Sample records for white rock creek

  1. 77 FR 1720 - Final Environmental Impact Statement for the White-Tailed Deer Management Plan, Rock Creek Park

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-11

    ...Impact Statement for the White-Tailed Deer Management Plan, Rock Creek Park AGENCY...Statement (FEIS) for the White-tailed Deer Management Plan (Plan), Rock Creek Park...alternatives for managing white- tailed deer in the park. The document describes...

  2. Impact of Urbanization on Storm Response of White Rock Creek, Dallas, Texas.

    NASA Astrophysics Data System (ADS)

    Williams, H.; Groening-Vicars, J.

    2005-12-01

    This study documents hydrological changes resulting from urbanization of the upper sub-basin of White Rock Creek watershed in Collin and Dallas counties, Texas. The 66.4 square mile watershed was transformed from 87% rural in 1961 to 95% urban in 2002, following construction of the Dallas suburbs of Richardson, Addison, Plano and Frisco. The objective of the study was to investigate changes in the storm response of White Rock Creek in terms of peak storm flow, storm flow volume and lag time. The approach employed to compare pre- and post-urbanization hydrology was to develop average unit hydrographs for each time period and use them to generate the creek's storm flow response to a set of six hypothetical precipitation events. The results suggest that substantial hydrological changes have occurred. The average infiltration capacity of the watershed was reduced by about 60%, so that storm flow was generated at lower precipitation intensities in the post-urbanization period. Storm flow peak discharge and volume were more than doubled for a hypothetical 10-year precipitation event. Average lag time was about 45 minutes faster in the post-urbanization period. It was concluded that urbanization has significantly impacted the storm response of the creek and increased the potential for flooding. It is anticipated that similar hydrological changes will occur in other rapidly urbanizing watersheds in the Dallas-Fort Worth Metropolitan region.

  3. Chemical and ecological health of white sucker (Catostomus Commersoni) in Rock Creek Park, Washington, D.C., 2003?04

    USGS Publications Warehouse

    Miller, C.V.; Weyers, H.S.; Blazer, V.S.; Freeman, M.E.

    2006-01-01

    Several classes of chemicals that are known or suspected contaminants were found in bed sediment in Rock Creek, including polyaromatic hydrocarbons (PAHs), phthalate esters, organochlorine pesticides, dioxins and furans, trace metals and metalloids (mercury, arsenic, cadmium, chromium, cobalt, copper, lead, nickel, silver, and zinc), and polychlorinated biphenyls (total PCBs and selected aroclors). Concentrations of many of these chemicals consistently exceeded thresholdor chronic-effects guidelines for the protection of aquatic life and often exceeded probable effects levels (PELs). Exceedance of PELs was dependent on the amount of total organic carbon in the sediments. Concurrent with the collection of sediment-quality data, white sucker (Catostomus commersoni) were evaluated for gross-external and internal-organ anomalies, whole-body burdens of chemical contaminants, and gut contents to determine prey. The histopathology of internal tissues of white sucker was compared to contaminant levels in fish tissue and bed sediment. Gut contents were examined to determine preferential prey and thus potential pathways for the bioaccumulation of chemicals from bed sediments. Male and female fish were tested separately. Lesions and other necroses were observed in all fish collected during both years of sample collection, indicating that fish in Rock Creek have experienced some form of environmental stress. No direct cause and effect was determined for chemical exposure and compromised fish health, but a substantial weight of evidence indicates that white sucker, which are bottom-feeding fish and low-order consumers in Rock Creek, are experiencing some reduction in vitality, possibly due to immunosuppression. Abnormalities observed in gonads of both sexes of white sucker and observations of abnormal behavior during spawning indicated some interruption in reproductive success.

  4. Chemical and Ecological Health of White Sucker (Catostomus Commersoni) in Rock Creek Park, Washington, D.C., 2003-04

    USGS Publications Warehouse

    Miller, Cherie V.; Weyers, Holly S.; Blazer, Vicki S.; Freeman, Mary E.

    2006-01-01

    Several classes of chemicals that are known or suspected contaminants were found in bed sediment in Rock Creek, including polyaromatic hydrocarbons (PAHs), phthalate esters, organochlorine pesticides, dioxins and furans, trace metals and metalloids (mercury, arsenic, cadmium, chromium, cobalt, copper, lead, nickel, silver, and zinc), and polychlorinated biphenyls (total PCBs and selected aroclors). Concentrations of many of these chemicals consistently exceeded threshold or chronic-effects guidelines for the protection of aquatic life and often exceeded probable effects levels (PELs). Exceedance of PELs was dependent on the amount of total organic carbon in the sediments. Concurrent with the collection of sediment-quality data, white sucker (Catostomus commersoni) were evaluated for gross-external and internal-organ anomalies, whole-body burdens of chemical contaminants, and gut contents to determine prey. The histopathology of internal tissues of white sucker was compared to contaminant levels in fish tissue and bed sediment. Gut contents were examined to determine preferential prey and thus potential pathways for the bioaccumulation of chemicals from bed sediments. Male and female fish were tested separately. Lesions and other necroses were observed in all fish collected during both years of sample collection, indicating that fish in Rock Creek have experienced some form of environmental stress. No direct cause and effect was determined for chemical exposure and compromised fish health, but a substantial weight of evidence indicates that white sucker, which are bottom-feeding fish and low-order consumers in Rock Creek, are experiencing some reduction in vitality, possibly due to immunosuppression. Abnormalities observed in gonads of both sexes of white sucker and observations of abnormal behavior during spawning indicated some interruption in reproductive success.

  5. White Rock

    NASA Technical Reports Server (NTRS)

    2002-01-01

    (Released 19 April 2002) The Science 'White Rock' is the unofficial name for this unusual landform which was first observed during the Mariner 9 mission in the early 1970's. As later analysis of additional data sets would show, White Rock is neither white nor dense rock. Its apparent brightness arises from the fact that the material surrounding it is so dark. Images from the Mars Global Surveyor MOC camera revealed dark sand dunes surrounding White Rock and on the floor of the troughs within it. Some of these dunes are just apparent in the THEMIS image. Although there was speculation that the material composing White Rock could be salts from an ancient dry lakebed, spectral data from the MGS TES instrument did not support this claim. Instead, the White Rock deposit may be the erosional remnant of a previously more continuous occurrence of air fall sediments, either volcanic ash or windblown dust. The THEMIS image offers new evidence for the idea that the original deposit covered a larger area. Approximately 10 kilometers to the southeast of the main deposit are some tiny knobs of similarly bright material preserved on the floor of a small crater. Given that the eolian erosion of the main White Rock deposit has produced isolated knobs at its edges, it is reasonable to suspect that the more distant outliers are the remnants of a once continuous deposit that stretched at least to this location. The fact that so little remains of the larger deposit suggests that the material is very easily eroded and simply blows away. The Story Fingers of hard, white rock seem to jut out like icy daggers across a moody Martian surface, but appearances can be deceiving. These bright, jagged features are neither white, nor icy, nor even hard and rocky! So what are they, and why are they so different from the surrounding terrain? Scientists know that you can't always trust what your eyes see alone. You have to use other kinds of science instruments to measure things that our eyes can't see . . . things like information about what kinds of minerals make up the landforms. Mars scientists once thought, for instance, that these unusual features might be vast hills of salt, the dried up remains of a long-ago, evaporated lake. Not so, said an instrument on the Mars Global Surveyor spacecraft, which revealed that the bright material is probably made up of volcanic ash or windblown dust instead. And talk about a cyclical 'ashes to ashes, dust to dust' story! Particles of this material fell and fell until they built up quite a sedimentary deposit, which was then only eroded away again by the wind over time, leaving the spiky terrain seen today. It looks white, but its apparent brightness arises from the fact that the surrounding material is so dark. Of course, good eyesight always helps in understanding. A camera on Mars Global Surveyor with close-up capabilities revealed that sand dunes are responsible for the smudgy dark material in the bright sediment and around it. But that's not all. The THEMIS camera on the Mars Odyssey spacecraft that took this image reveals that this ashy or dusty deposit once covered a much larger area than it does today. Look yourself for two small dots of white material on the floor of a small crater nearby (center right in this image). They preserve a record that this bright deposit once reached much farther. Since so little of it remains, you can figure that the material probably isn't very hard, and simply blows away. One thing's for sure. No one looking at this image could ever think that Mars is a boring place. With all of its bright and dark contrasts, this picture would be perfect for anyone who loves Ansel Adams and his black-and-white photography.

  6. White Rock

    NASA Technical Reports Server (NTRS)

    2005-01-01

    14 November 2005 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a portion of the famous 'White Rock' feature in Pollack Crater in the Sinus Sabaeus region of Mars. The light-toned rock is not really white, but its light tone caught the eye of Mars geologists as far back as 1972, when it was first spotted in images acquired by Mariner 9. The light-toned materials are probably the remains of a suite of layered sediments that once spread completely across the interior of Pollack Crater. Dark materials in this image include sand dunes and large ripples.

    Location near: 8.1oS, 335.1oW Image width: width: 3 km (1.9 mi) Illumination from: lower left Season: Southern Summer

  7. Metasedimentary Rocks at the Apple Creek Formation

    USGS Multimedia Gallery

    USGS scientist Art Bookstrom looks at puzzling sedimentary structures in metasedimentary rocks of the Apple Creek Formation, near the Jackass prospect, near Iron Creek, in the southeastern part of the Idaho cobalt belt, in east-central Idaho....

  8. 63. SURVEY OF RESERVOIR SITE ON LITTLE ROCK CREEK FOR ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    63. SURVEY OF RESERVOIR SITE ON LITTLE ROCK CREEK FOR PALMDALE WATER CO., J.B. LIPPINCOTT ENGINEERING OFFICES; OCTOBER, 1915. Palmdale Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  9. 20. DISTANT HELICOPTER VIEW TO SOUTHEAST UP LITTLE ROCK CREEK ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. DISTANT HELICOPTER VIEW TO SOUTHEAST UP LITTLE ROCK CREEK CANYON, WITH DAM AND RESERVOIR AT RIGHT CENTER. PALMDALE-LITTLEROCK DITCH, MARKED BY DENSE VEGETATION, CROSSES ROAD AT LOWER CENTER - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  10. 11. DETAIL VIEW OF DECK OF ROCK CREEK RAILWAY BRIDGE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. DETAIL VIEW OF DECK OF ROCK CREEK RAILWAY BRIDGE, FACING NORTHWEST - Oregon Electric Railway Westside Corridor, Hillsboro Extension, Between 185th Avenue & Hillsboro, Beaverton, Washington County, OR

  11. 10. DETAIL VIEW OF UNDERSIDE OF ROCK CREEK RAILWAY BRIDGE, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. DETAIL VIEW OF UNDERSIDE OF ROCK CREEK RAILWAY BRIDGE, FACING NORTHWEST - Oregon Electric Railway Westside Corridor, Hillsboro Extension, Between 185th Avenue & Hillsboro, Beaverton, Washington County, OR

  12. ROCK CREEK, IDAHO WATER QUALITY STATUS REPORT, 1970-1984

    EPA Science Inventory

    The study was designed to determine the characteristics and amounts of industrial and municipal wastes discharged to Rock Creek, Idaho (17040212) and subsequently into the Snake River and to evaluate the effects of these wastes on the biota and water quality of Rock Creek. Indus...

  13. "Bridge #6 Rock Creek: Castiron 48" pipe lines to ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    "Bridge #6 - Rock Creek: Cast-iron 48" pipe lines to Gravity - 1859." Construction photo of Pennsylvania Avenue Bridge, 1859. Photograph courtesy Washington Aqueduct Division, U.S. Army Corps of Engineers - Pennsylvania Avenue Bridge, Spanning Rock Creek & Potomac Parkway, Washington, District of Columbia, DC

  14. 8. VIEW OF ROCK CREEK RAILWAY BRIDGE FROM WEST SIDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. VIEW OF ROCK CREEK RAILWAY BRIDGE FROM WEST SIDE OF 216TH AVENUE, FACING WEST - Oregon Electric Railway Westside Corridor, Hillsboro Extension, Between 185th Avenue & Hillsboro, Beaverton, Washington County, OR

  15. 9. VIEW OF ROCK CREEK RAILWAY BRIDGE FROM WEST SIDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. VIEW OF ROCK CREEK RAILWAY BRIDGE FROM WEST SIDE OF 216TH AVENUE, FACING NORTHWEST - Oregon Electric Railway Westside Corridor, Hillsboro Extension, Between 185th Avenue & Hillsboro, Beaverton, Washington County, OR

  16. 7. VIEW OF ROCK CREEK RAILWAY BRIDGE FROM EAST SIDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. VIEW OF ROCK CREEK RAILWAY BRIDGE FROM EAST SIDE OF 216TH AVENUE, FACING WEST - Oregon Electric Railway Westside Corridor, Hillsboro Extension, Between 185th Avenue & Hillsboro, Beaverton, Washington County, OR

  17. Floodplain and wetlands assessment of the White Oak Creek Embayment

    SciTech Connect

    Not Available

    1991-07-01

    This report describes the proposed methods for dealing with contaminants that have accumulated in White Oak Creek, White Oak Lake, and the White Oak Creek Embayment as a result of process releases and discharges from the Oak Ridge National Laboratory. Alternative methods of cleaning up the area which were considered in accordance with regulatory guidelines are listed, and information supporting the selected methods is provided. Also included are results of a site survey conducted at the White Oak Creek Embayment and the expected effects of the proposed control structures on the floodplain and wetlands. The appendix contains figures showing the nine cross-sections of the stream channel surveyed during studies of the White Oak Creek area.

  18. White Oak Creek embayment sediment retention structure design and construction

    Microsoft Academic Search

    S. D. Van Hoesen; B. L. Kimmell; D. G. Page; R. B. Wilkerson; G. R. Hudson; J. L. Kauschinger; M. Zocolla

    1994-01-01

    White Oak Creek is the major surface water drainage throughout the Department of Energy (DOE) Oak Ridge National Laboratory (ORNL). Samples taken from the lower portion of the creek revealed high levels of Cesium 137 and lower level of Cobalt 60 in near surface sediment. Other contaminants present in the sediment included: lead, mercury, chromium, and PCBs. In October 1990,

  19. 76 FR 10938 - Notice of Final Federal Agency Actions on Sunrise Project, I-205 to Rock Creek Junction...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-28

    ...Actions on Sunrise Project, I-205 to Rock Creek Junction: Clackamas County, OR...project, Sunrise Project, I-205 to Rock Creek Junction, Clackamas County, Oregon...587-4716. The Sunrise Project, I-205 to Rock Creek Junction Final Environmental...

  20. Water quality monitoring report for the White Oak Creek Embayment

    Microsoft Academic Search

    C. J. Ford; M. T. Wefer

    1993-01-01

    Water quality monitoring activities that focused on the detection of resuspended sediments in the Clinch River were conducted in conjunction with the White Oak Creek Embayment (WOCE) time-critical Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) removal action to construct a sediment-retention structure at the mouth of White Oak Creek (WOC). Samples were collected by use of a 24-h composite

  1. ROCK CREEK, IDAHO RURAL CLEAN WATER PROGRAM TEN YEAR REPORT. 1981-1991

    EPA Science Inventory

    Prior to this program, water quality of Rock Creek, Idaho (170040212) was severely impacted by irrigated agriculture. Impairments included phosphate, organic nitrogen, suspended solids, turbidity, bacteria, and toxic chemicals. The uses of Rock Creek for recreation, drinking wa...

  2. ROCK CREEK RURAL CLEAN WATER PROGRAM, 1988 ANNUAL PROGRESS REPORT

    EPA Science Inventory

    Implementation of the Rock Creek (17040212) rural clean water program began in 1980, following a Section 208 planning study. Contracting phases concluded on September 30, 1986. Best Management Practices (BMP) implementation phase began in 1980. As of 1 Oct 88, 38% of the contr...

  3. White Rock in False Color

    NASA Technical Reports Server (NTRS)

    2005-01-01

    [figure removed for brevity, see original site]

    The THEMIS VIS camera is capable of capturing color images of the Martian surface using five different color filters. In this mode of operation, the spatial resolution and coverage of the image must be reduced to accommodate the additional data volume produced from using multiple filters. To make a color image, three of the five filter images (each in grayscale) are selected. Each is contrast enhanced and then converted to a red, green, or blue intensity image. These three images are then combined to produce a full color, single image. Because the THEMIS color filters don't span the full range of colors seen by the human eye, a color THEMIS image does not represent true color. Also, because each single-filter image is contrast enhanced before inclusion in the three-color image, the apparent color variation of the scene is exaggerated. Nevertheless, the color variation that does appear is representative of some change in color, however subtle, in the actual scene. Note that the long edges of THEMIS color images typically contain color artifacts that do not represent surface variation.

    This false color image shows the wind eroded deposit in Pollack Crater called 'White Rock'. This image was collected during the Southern Fall Season.

    Image information: VIS instrument. Latitude -8, Longitude 25.2 East (334.8 West). 0 meter/pixel resolution.

    Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

    NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

  4. 75 FR 55539 - Crooked Creek Reservoir Repair; White River National Forest, Eagle County, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-13

    ...DEPARTMENT OF AGRICULTURE Forest Service Crooked Creek Reservoir Repair; White River National Forest, Eagle County, CO AGENCY...environmental impact statement (ElS) for the Crooked Creek Reservoir Repair project on the Sopris Ranger District of the...

  5. 33 CFR 208.29 - Arbuckle Dam and Lake of the Arbuckles, Rock Creek, Okla.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Arbuckle Dam and Lake of the Arbuckles, Rock Creek...CONTROL REGULATIONS § 208.29 Arbuckle Dam and Lake of the Arbuckles, Rock Creek...designated agent, shall operate the Arbuckle Dam and Lake of the Arbuckles in the...

  6. 33 CFR 208.29 - Arbuckle Dam and Lake of the Arbuckles, Rock Creek, Okla.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2013-07-01 false Arbuckle Dam and Lake of the Arbuckles, Rock Creek...CONTROL REGULATIONS § 208.29 Arbuckle Dam and Lake of the Arbuckles, Rock Creek...designated agent, shall operate the Arbuckle Dam and Lake of the Arbuckles in the...

  7. 33 CFR 208.29 - Arbuckle Dam and Lake of the Arbuckles, Rock Creek, Okla.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Arbuckle Dam and Lake of the Arbuckles, Rock Creek...CONTROL REGULATIONS § 208.29 Arbuckle Dam and Lake of the Arbuckles, Rock Creek...designated agent, shall operate the Arbuckle Dam and Lake of the Arbuckles in the...

  8. 33 CFR 208.29 - Arbuckle Dam and Lake of the Arbuckles, Rock Creek, Okla.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Arbuckle Dam and Lake of the Arbuckles, Rock Creek...CONTROL REGULATIONS § 208.29 Arbuckle Dam and Lake of the Arbuckles, Rock Creek...designated agent, shall operate the Arbuckle Dam and Lake of the Arbuckles in the...

  9. 33 CFR 208.29 - Arbuckle Dam and Lake of the Arbuckles, Rock Creek, Okla.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Arbuckle Dam and Lake of the Arbuckles, Rock Creek...CONTROL REGULATIONS § 208.29 Arbuckle Dam and Lake of the Arbuckles, Rock Creek...designated agent, shall operate the Arbuckle Dam and Lake of the Arbuckles in the...

  10. Rock Creek methane from Multiple Coal Seams Completion Project. Topical report. Rock Creek coalbed methane data summary, December 1990

    SciTech Connect

    Dobscha, F.X.; Headley, A.L.; Lambert, S.W.; Lanier, J.B.; Robb, J.C.

    1990-12-01

    The Multiple Coal Seams Completion Project is a joint venture, investigating the drilling, completion, testing, stimulation, and production procedures for the economic production of methane from multiple coal seams. The report summarizes research conducted at Rock Creek to date. Much geologic and reservoir characterization of the project site has been performed to provide a basis for stimulation design, production analysis and reservoir testing. Geologic characterization included stratigraphic and structural evaluation along with coal cleat, rock joint, seam thickness, coal methane content, coal chemistry and coal petrography studies. Extensive reservoir data has been collected from permeability testing, hydrologic testing, stress testing, production and pressure monitoring, and a gas and water analysis program. Stimulation design and post testment diagnostics have been performed to optimize stimulation designs.

  11. Uranium-bearing coal and carbonaceous rocks in the Fall Creek area, Bonneville County, Idaho

    USGS Publications Warehouse

    Vine, James D.; Moore, George Winfred

    1952-01-01

    Uraniferous coal, carbonaceous shale, and carbonaceous limestone occur in the Bear River formation of Early Cretaceous age at the Fall Creek prospect, in the Fall Creek area, Bonneville County, Idaho. The uranium compounds are believed to have been derived from mildly radioactive silicic volcanic rocks of Tertiary age that rest unconformably on all older rocks and once overlay the Bear River formation and its coal. Meteoric water, percolating downward through the silicic volcanic rocks and into the older rocks along joints and faults, is believed to have brought the uranium compounds into contact with the coal and carbonaceous rocks in which the uranium was absorbed.

  12. ROCK CREEK, IDAHO RURAL CLEAN WATER PROGRAM COMPREHENSIVE WATER QUALITY MONITORING ANNUAL REPORT 1989

    EPA Science Inventory

    This report documents progress on for the Rock Creek Rural Clean Water Program, Twin Falls County, Idaho (17040212), initiated in 1981. Results through 1988 suggest that Best Management Practices (BMPs) implemented under the program have improved water quality in the creek. BMP...

  13. Spawning Behavior of the Shorthead Redhorse, Moxostoma macrolepidotum, in Big Rock Creek, Illinois

    Microsoft Academic Search

    Brooks M. Burr; Michael A. Morris

    1977-01-01

    Shorthead redhorse were observed spawning on 17 and 18 May 1976 in Big Rock Creek, Illinois, at 16 C in a manner similar to that described for other redhorse species. Spawning behavior and reproductive characteristics are described for the species.

  14. Water quality monitoring report for the White Oak Creek Embayment. Environmental Restoration Program

    Microsoft Academic Search

    C. J. Ford; M. T. Wefer

    1993-01-01

    Water quality monitoring activities that focused on the detection of resuspended sediments in the Clinch River were conducted in conjunction with the White Oak Creek Embayment (WOCE) time-critical Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) removal action to construct a sediment-retention structure at the mouth of White Oak Creek (WOC). Samples were collected by use of a 24-h composite

  15. Rock creek methane from multiple coal seams completion project: Rock Creek coalbed methane completion project data summary update. Topical report, December 1990-February 1995

    SciTech Connect

    Ellard, J.; Lambert, S.W.; Litzinger, L.A.; Saulsberry, J.L.; Steidl, P.F.

    1995-12-01

    The report provides a summary of the data collected from 12 production wells and 17 monitor wells that were present at the Rock Creek Project. Well testing, reservoir evaluation, experimental fracturing treatments, diagnostic testing, and production testing were conducted to optimize stimulation methods for multiple thin coal seams. Much geologic and reservoir characterization of the project site has been performed to provide a basis for stimulation design, production analysis and reservoir testing. Geologic characterization included stratigraphic and structural evaluation along with coal cleat, rock joint, seam thickness, coal methane content, coal chemistry and coal petrography studies. The report summarizes the data collected over the 10 year life of the project.

  16. Monitoring and modeling contaminated sediment transport in the White Oak Creek watershed. Environmental Restoration Program

    SciTech Connect

    Fontaine, T.A.

    1991-11-01

    Over the past 47 years, operations and waste disposal activities at Oak Ridge National Laboratory have resulted in the contamination of the White Oak Creek drainage system. The containments presenting the highest risk to human health and the environment are particle reactive and are associated with the soils and sediments in White Oak Creek. During floods, the erosion of these sediments results in the transport of contaminants out of the catchment into the Clinch River. A long-term strategy is required to monitor the movement of contaminated sediments and to predict the transport of these sediments that could occur during major floods. A monitoring program will provide the information required to (1) evaluate the existing off-site transport of contaminated sediments, (2) evaluate the need for short-term control measures, (3) set priorities for remediation of contaminated areas in White Oak Creek (4) verify the success of completed remedial actions intended to control the movement of contaminated sediments, and (5) develop a computer model to simulate the transport of contaminated sediments in White Oak Creek. A contaminant-transport model will be developed to (1) evaluate the potential for the off-site transport of contaminated sediments during major floods, (2) develop long term control measures and remediation solutions, (3) predict the impact of future land-use changes in White Oak Creek on the transport of contaminated sediment. This report contains a plan for the monitoring and modeling activities required to accomplish these objectives.

  17. Monitoring and modeling contaminated sediment transport in the White Oak Creek watershed

    SciTech Connect

    Fontaine, T.A.

    1991-11-01

    Over the past 47 years, operations and waste disposal activities at Oak Ridge National Laboratory have resulted in the contamination of the White Oak Creek drainage system. The containments presenting the highest risk to human health and the environment are particle reactive and are associated with the soils and sediments in White Oak Creek. During floods, the erosion of these sediments results in the transport of contaminants out of the catchment into the Clinch River. A long-term strategy is required to monitor the movement of contaminated sediments and to predict the transport of these sediments that could occur during major floods. A monitoring program will provide the information required to (1) evaluate the existing off-site transport of contaminated sediments, (2) evaluate the need for short-term control measures, (3) set priorities for remediation of contaminated areas in White Oak Creek (4) verify the success of completed remedial actions intended to control the movement of contaminated sediments, and (5) develop a computer model to simulate the transport of contaminated sediments in White Oak Creek. A contaminant-transport model will be developed to (1) evaluate the potential for the off-site transport of contaminated sediments during major floods, (2) develop long term control measures and remediation solutions, (3) predict the impact of future land-use changes in White Oak Creek on the transport of contaminated sediment. This report contains a plan for the monitoring and modeling activities required to accomplish these objectives.

  18. Portland Community College, Rock Creek: A Community Based Educational Shopping Center.

    ERIC Educational Resources Information Center

    De Bernardis, Amo

    An overview is presented of Portland Community College's plans to create the Rock Creek campus, scheduled to open in January 1976. The physical environment is considered to be an important factor in a student's cultural and aesthetic experience, and all facilities have been designed with this in mind. The philosophy guiding campus planning is one…

  19. ROCK CREEK RURAL CLEAN WATER PROGRAM, COMPREHENSIVE WATER QUALITY MONITORING, ANNUAL REPORT, 1988.

    EPA Science Inventory

    Water quality monitoring for the Rock Creek (17040212) rural clean water program was initiated by the ID Department of health and Welfare, Division of Environment in 1981. The results to date suggest that Best Management Practices (BMPs) implemented in the project area have impr...

  20. UPPER ROCK CREEK, IDAHO WATER QUALITY STATUS REPORT, 1976-1977

    EPA Science Inventory

    Water quality samples were collected monthly at 2 stations on Upper Rock Creek in Twin Falls and Cassia Counties, Idaho (17040212) from July 1975 through August 1977. Most parameters were within Idaho Water Quality Standards at the Sawtooth Forest Service boundary wIth the excep...

  1. White Oak Creek embayment sediment retention structure: The Oak Ridge model in action

    Microsoft Academic Search

    S. D. Van Hoesen; B. L. Kimmel; D. G. Page; G. R. Hudson; R. B. Wilkerson; M. Zocolla; J. L. Kauschinger

    1992-01-01

    White Oak Creek is the major surface-water drainage through the Department of Energy (DOE) Oak Ridge National Laboratory (ORNL). Samples taken from the lower portion of the creek revealed high levels of Cesium-137, and lower levels of Cobalt-60 in near-surface sediment. Other contaminants present in the sediment included: lead, mercury, chromium, and PCBS. In October 1990, DOE, US Environmental Protection

  2. Volunteers begin transforming Rock Creek-Clark Fork land back to prairie http://missoulian.com/news/state-and-regional/volunteers-begin-process-of-transforming-rock-creek-clark-fork-land/article_0a662764-afa2-11e2-bfb5-0019bb2963f4.html[4/28/2013 8:41:30

    E-print Network

    Vonessen, Nikolaus

    Volunteers begin transforming Rock Creek-Clark Fork land back to prairie http://missoulian.com/news/state-and-regional/volunteers-begin-process-of-transforming-rock-creek-clark-fork-land/article_0a662764) Comments Home / News / Montana & Regional CLEANUP Volunteers begin transforming Rock Creek-Clark Fork land

  3. Water balance dynamics of a boreal forest watershed: White Gull Creek basin, 1994–1996

    Microsoft Academic Search

    Bart Nijssen; Dennis P. Lettenmaier

    2002-01-01

    Field measurements from the Boreal Ecosystem-Atmosphere Study (BOREAS) were combined to calculate the water balance of the White Gull Creek basin for the three year period 1994–1996. Evapotranspiration was mapped from the observations made at the BOREAS flux towers to the basin using a simple evaporation model with a bulk canopy resistance based on tower observations. Runoff ratios were low,

  4. Water balance dynamics of a boreal forest watershed: White Gull Creek basin, 1994-1996

    Microsoft Academic Search

    Bart Nijssen; Dennis P. Lettenmaier

    2002-01-01

    Field measurements from the Boreal Ecosystem-Atmosphere Study (BOREAS) were combined to calculate the water balance of the White Gull Creek basin for the three year period 1994-1996. Evapotranspiration was mapped from the observations made at the BOREAS flux towers to the basin using a simple evaporation model with a bulk canopy resistance based on tower observations. Runoff ratios were low,

  5. Petrochemistry of Mafic Rocks Within the Northern Cache Creek Terrane, NW British Columbia, Canada

    NASA Astrophysics Data System (ADS)

    English, J. M.; Johnston, S. T.; Mihalynuk, M. G.

    2002-12-01

    The Cache Creek terrane is a belt of oceanic rocks that extend the length of the Cordillera in British Columbia. Fossil fauna in this belt are exotic with respect to the remainder of the Canadian Cordillera, as they are of equatorial Tethyan affinity, contrasting with coeval faunas in adjacent terranes that show closer linkages with ancestral North America. Preliminary results reported here from geochemical studies of mafic rocks within the Nakina area of NW British Columbia further constrain the origin of this enigmatic terrane. The terrane is typified by tectonically imbricated slices of chert, argillite, limestone, wacke and volcaniclastic rocks, as well as mafic and ultramafic rocks. These lithologies are believed to represent two separate lithotectonic elements: Upper Triassic to Lower Jurassic, subduction-related accretionary complexes, and dismembered basement assemblages emplaced during the closure of the Cache Creek ocean in the Middle Jurassic. Petrochemical analysis revealed four distinct mafic igneous assemblages that include: magmatic 'knockers' of the Nimbus serpentinite mélange, metabasalts of 'Blackcaps' Mountain, augite-phyric breccias of 'Laughing Moose' Creek, and volcanic pediments to the reef-forming carbonates of the Horsefeed Formation. Major and trace element analysis classifies the 'Laughing Moose' breccias and the carbonate-associated volcanics as alkaline in nature, whereas the rest are subalkaline. Tectonic discrimination diagrams show that the alkaline rocks are of within-plate affinity, while the 'Blackcaps' basalts and 'knockers' from within the mélange typically straddle the island-arc tholeiite and the mid-ocean ridge boundaries. However, primitive mantle normalized multi-element plots indicate that these subalkaline rocks have pronounced negative Nb anomalies, a characteristic arc signature. The spatial association of alkaline volcanic rocks with extensive carbonate domains points to the existence of seamounts within the Cache Creek ocean. However, the precise origin of the 'Laughing Moose' breccias remains somewhat uncertain and may be related to a subsequent rifting event. To conclude, preliminary data from the Nakina region show it to be dominated by two different petrogenetic components: alkaline volcanic rocks of within-plate affinity, and primitive arc-related, subalkaline mafic rocks. An accretionary complex/ oceanic arc origin may provide a mechanism to explain the lithological diversity within the Nakina area.

  6. February 24, 2014 Thank you for inquiring about the Castle Rock (Plum Creek Valley) Farmers' Market.

    E-print Network

    February 24, 2014 Thank you for inquiring about the Castle Rock (Plum Creek Valley) Farmers' Market. The market will begin July12, 2014 and run through October 4, 2014. The hours will be 8:00 a.m. to 12:00 noon (VENDORS need to be in their designated spot and set up by 7:30 a.m.). The market is located at 3rd

  7. February 15, 2013 Thank you for inquiring about the Castle Rock (Plum Creek Valley) Farmers' Market.

    E-print Network

    Stephens, Graeme L.

    February 15, 2013 Thank you for inquiring about the Castle Rock (Plum Creek Valley) Farmers' Market. The market will begin July13, 2013 and run through October 5, 2013. The hours will be 8:00 a.m. to 12:00 noon (VENDORS need to be in their designated spot and set up by 7:30 a.m.). The market has moved to a new

  8. Extent and bioavailability of trace metal contamination due to acid rock drainage in Pennask Creek, British Columbia, Canada

    NASA Astrophysics Data System (ADS)

    Walls, L. D.; Li, L. Y.; Hall, K. J.

    2010-05-01

    Pennask Creek is one of the most important rainbow trout producing streams in British Columbia (BC). Much of the Pennask Creek watershed is located within a BC Parks Protected Area, which was set aside to protect the spawning and rearing habitat of this wild rainbow trout population. Construction of Highway 97C, which bisects the Pennask Creek watershed, resulted in the exposure of a highly pyritic rock formation, which began releasing acid rock drainage and causing metals to be leached into Highway Creek, a tributary of Pennask Creek. Previous studies commissioned by the BC Ministry of Transportation and Infrastructure indicate that Highway Creek yields fewer invertebrates and elevated levels of some metals in the water when compared with downstream sites in Pennask Creek. This study examines the impacts of this acid rock drainage and metal leaching by determining the extent of trace metal contamination in the water and sediments of the Pennask Creek watershed and determining the bioavailability of these trace metals. Preliminary results indicate concentrations of Al, Cu, and Zn in the water as well as levels of total As, Cu, Fe, Ni, and Zn in the sediments that are above the BC Water and Sediment Quality Guidelines for the Protection of Aquatic Life. The highest level of trace metal contamination is found in Highway Creek, downstream of Highway 97C, with concentrations generally returning to near background levels downstream of the confluence with Pennask Creek. Levels of Cu in the water and Zn in the sediments appear to be of greatest concern in areas furthest from the highway.

  9. Post-rock-avalanche dam outburst flood sedimentation in Ram Creek, Southern Alps, New Zealand

    NASA Astrophysics Data System (ADS)

    Harrison, Lisa M.; Dunning, Stuart A.; Woodward, John; Davies, Timothy R. H.

    2015-07-01

    Rock avalanches are common in mountainous regions that are tectonically active. They are capable of forming natural dams of uncertain persistence that have significant impacts on the river system over wide spatial scales and possibly over geological time scales. Here we combine field data and digital elevation model (DEM) analysis to show the response of Ram Creek, New Zealand, to 28 years of sediment dispersion following the 1968 emplacement of a co-seismic, rock-avalanche dam that breached catastrophically in 1981. The results show a system that has not attained equilibrium, being unable to move the quantity of dam-derived sediments, and will likely not attain equilibrium before the next major sediment input; it is in a state of persistent disturbance where localised reworking dominates. Erosion in Ram Creek is focussed on lateral bevelling and bedrock gorge widening rather than vertical incision to keep pace with tectonic uplift. Importantly for studies of tectonic geomorphology, this widening - which if sustained will form a strath terrace - does not represent a period of reduced uplift. Stream metrics (concavity and steepness) are unable to differentiate the identified rock-avalanche-induced knickpoint from tectonic and lithological knickpoints.

  10. Eocene sedimentary and volcanic rocks and their use in dating Mesozoic and Tertiary structures in the southern Deep Creek range, Nevada and Utah

    SciTech Connect

    Nutt, C.J.; Thorman, C.H. (Geological Survey, Denver, CO (United States))

    1993-04-01

    Lower Eocene White Sage Formation and upper Eocene volcanic rocks are used to date Mesozoic to middle-Tertiary structures in and near the Goshute Indian Reservation, southern Deep Creek Range. Outcrops of conglomerate, limestone, and dolomite that are correlated with the White Sage type section at Gold Hill are scarce and confined to the eastern part of the map area. Voluminous volcanic rocks (39.5-- 39 Ma) are exposed in the western part of the map area. The relationships between these structures and the lower and upper Eocene rocks indicate that the attenuation faults are Paleocene or older, the broad folds are early to late Eocene, and the high-angle faults are post-late Eocene. Low-angle attenuation faults are most prominent at the Pennsylvanian Ely Limestone-Mississippian Chainman Shale contact, at the Mississippian-Devonian Pilot Shale-Devonian Guilmette Formation contact, and at the top of the Ordovician Eureka Quartzite. The White Sage overlies an attenuated section of Pilot Shale and Guilmette, establishing that the faults are pre-early Eocene. Deposition of White Sage on both Pennsylvanian and Devonian rocks indicates that by early Eocene time the attenuated Paleozoic rocks had been deeply eroded. Broad, N-NE-trending folds deform the White Sage and older rocks but are overlain unconformably by a 39.5-Ma basal tuff, restricting the age of folding to the middle Eocene. Deformation of this age has also been documented at Gold Hill and on the east side of the Elko Basin. Erosion followed folding and stripped the White Sage from most of the area. High-angle, down-to-the-west faults cut all Eocene rocks and are therefore younger than about 39 Ma. Near the southern boundary of the Reservation, the faults die out, and, where present, become near bedding-parallel in moderately to steeply dipping and thinly bedded rocks. These faults can be distinguished from the older attenuation faults by their association with numerous, small-scale, listic normal faults.

  11. Overview of GRI research at the Rock Creek Site, Black Warrior Basin. Overview of GRI research at Rock Creek: Eight years of cooperative research, coalbed methane shortcourse. Held in Abingdon, Virginia on October 23, 1992. Topical report

    SciTech Connect

    Schraufnagel, R.

    1992-10-01

    The presentation slides from the October 23, 1992 workshop on coalbed methane exploration and production are assembled in this volume. They illustrate the following discussions: Overview of GRI Research at Rock Creek: Eight Years of Cooperative Research, Drilling and Completing Coalbed Methane Wells: Techniques for Fragile Formations, Connecting the Wellborne to the Formation: Perforations vs. Slotting, Coalbed Methane Well Testing in the Warrior Basin, Reservoir Engineering: A Case Study at Rock Creek, Fraccing of Multiple Thin Seams: Considerations and Constraints, Implementing Coal Seam Stimulations: Requirements for Successful Treatments, Coal-Fluid Interactions, Mine-Through Observations of Coal Seam Stimulations: Reality vs. Theory, and Recompleting Coalbed Methane Wells: The Second Try at Success.

  12. Overview of GRI research at the Rock Creek Site, Black Warrior Basin. Overview of GRI research at Rock Creek: Eight years of cooperative research, coalbed methane shortcourse. Held in Birmingham, Alabama on October 21, 1992. Topical report

    SciTech Connect

    Schraufnagel, R.

    1992-10-01

    The presentation slides from the October 21, 1992 workshop on coalbed methane exploration and production are assembled in this volume. They illustrate the following discussions Overview of GRI Research at Rock Creek: Eight Years of Cooperative Research, Drilling and Completing Coalbed to the Formation: Perforations vs. Slotting, Coalbed Methane Well Testing in the Warrior Basin, Reservoir Engineering: A Case Study at Rock Creek, Fraccing of Multiple Thin Seams: Considerations and Constraints, Implementing Coal Seam Stimulations: Requirements for Successful Treatments, Coal-Fluid Interactions, Mine-Through Observations of Coal Seam Stimulations: Reality vs. Theory, and Improving Gas Production: Techniques of Operations.

  13. Analyses of geochemical samples and descriptions of rock samples, Adams Gap and Shinbone Creek Roadless Areas, Clay County, Alabama

    USGS Publications Warehouse

    Erickson, M.S.; Hanley, J.T.; Kelley, D.L.; Sherlock, L.J.

    1983-01-01

    Semiquantitative spectrographic analyses for 31 elements on 105 rocks, 47 stream-sediment, and 70 soil samples from the Adams Gap and Shinbone Creek Roadless Areas and vicinity, Talladega National Forest, Clay County, Alabama are reported here in detail. Atomic-absorption analyses for zinc in all samples and for gold in 5 selected rock samples are also reported. Localities for all sables are given in Universal Transverse Mercator (UTM) coordinates. A brief description of each rock sample is included. Rocks analyzed include quartzite, phyllite, vein quartz, and schist.

  14. Impacts on water quality and biota from natural acid rock drainage in Colorado's Lake Creek watershed

    USGS Publications Warehouse

    Bird, D.A.; Sares, Matthew A.; Policky, Greg A.; Schmidt, Travis S.; Church, Stanley E.

    2006-01-01

    Colorado's Lake Creek watershed hosts natural acid rock drainage that significantly impacts surface water, streambed sediment, and aquatic life. The source of the ARD is a group of iron-rich springs that emerge from intensely hydrothermally altered, unexploited, low-grade porphyry copper mineralization in the Grizzly Peak Caldera. Source water chemistry includes pH of 2.5 and dissolved metal concentrations of up to 277 mg/L aluminum, 498 mg/L iron, and 10 mg/L copper. From the hydrothermally altered area downstream for 27 kilometers to Twin Lakes Reservoir, metal concentrations in streambed sediment are elevated and the watershed experiences locally severe adverse impacts to aquatic life due to the acidic, metal-laden water. The water and sediment quality of Twin Lakes Reservoir is sufficiently improved that the reservoir supports a trout fishery, and remnants of upstream ARD are negligible.

  15. Overview of the Lithophile Element-Bearing Magmatic-Hydrothermal System at Birch Creek, White Mountains, California

    E-print Network

    Barton, Mark D.

    9 Overview of the Lithophile Element-Bearing Magmatic-Hydrothermal System at Birch Creek, White of Arizona, Tucson, Arizona 85721 Abstract A large lithophile element-bearing hydrothermal system, these occurrences resemble other Mesozoic W-Sn-F-Be bearing systems in circum- Pacific; however, these seemingly

  16. The development of an aquatic spill model for the White Oak Creek watershed, Oak Ridge National Laboratory, Oak Ridge, Tennessee

    SciTech Connect

    Johnson, R.O.

    1996-05-01

    This study develops an aquatic spill model applicable to the White Oak Creek watershed draining the Oak Ridge National Laboratory. Hazardous, toxic, and radioactive chemicals are handled and stored on the laboratory reservation. An accidental spill into the White Oak Creek watershed could contaminate downstream water supplies if insufficient dilution did not occur. White Oak Creek empties into the Clinch River, which flows into the Tennessee River. Both rivers serve as municipal water supplies. The aquatic spill model provides estimates of the dilution at sequential downstream locations along White Oak creek and the Clinch River after an accidental spill of a liquid containing a radioactively decaying constituent. The location of the spill on the laboratory is arbitrary, while hydrologic conditions range from drought to extreme flood are simulated. The aquatic spill model provides quantitative estimates with which to assess water quality downstream from the site of the accidental spill, allowing an informed decision to be made whether to perform mitigating measures so that the integrity of affected water supplies is not jeopardized.

  17. Streamflow characteristics of small tributaries of Rock Creek, Milk River basin, Montana, base period water years 1983-87

    USGS Publications Warehouse

    Parrett, Charles; Hull, J.A.

    1990-01-01

    Five streamflow-gaging stations were installed in the Rock Creek basin north of the Milk River near Hinsdale, Montana. Streamflow was monitored at these stations and at an existing gaging station upstream on Rock Creek from May 1983 through September 1987. The data collected were used to describe the flow characteristics of four small tributary streams. Annual mean streamflow ranges from 2.8 to 57 cu ft/sec in the mainstem and from 0 to 0.60 cu ft/sec in the tributaries. Monthly mean streamflow ranged from 0 to 528 cu ft/sec in Rock Creek and from zero to 5.3 cu ft/sec in the four tributaries. The six gaged sites show similar patterns of daily mean streamflow during periods of large runoff, but substantial individual variations during periods of lesser runoff. During periods of lesser runoff , the small tributaries may have small daily mean streamflows. At other times, daily mean streamflow at the two mainstem sites decreased downstream. Daily mean streamflow in the tributaries appears to be closely related to daily mean streamflow in the mainstem only during periods of substantial area-wide runoff. Thus, streamflow in the tributaries resulting from local storms or local snowmelt may not contribute to streamflow in the mainstem. (USGS)

  18. Rock-Eval pyrolysis and vitrinite reflectance results from the Sheep Creek 1 well, Susitna basin, south-central Alaska

    USGS Publications Warehouse

    Stanley, Richard G.; Lillis, Paul G.; Pawlewicz, Mark J.; Haeussler, Peter J.

    2014-01-01

    We used Rock-Eval pyrolysis and vitrinite reflectance to examine the petroleum source potential of rock samples from the Sheep Creek 1 well in the Susitna basin of south-central Alaska. The results show that Miocene nonmarine coal, carbonaceous shale, and mudstone are potential sources of hydrocarbons and are thermally immature with respect to the oil window. In the samples that we studied, coals are more organic-rich and more oil-prone than carbonaceous shales and silty mudstones, which appear to be potential sources of natural gas. Lithologically similar rocks may be present in the deeper parts of the subsurface Susitna basin located west of the Sheep Creek 1 well, where they may have been buried deeply enough to generate oil and (or) gas. The Susitna basin is sparsely drilled and mostly unexplored, and no commercial production of hydrocarbons has been obtained. However, the existence of potential source rocks of oil and gas, as shown by our Rock-Eval results, suggests that undiscovered petroleum accumulations may be present in the Susitna basin.

  19. White Oak Creek watershed: Melton Valley area Remedial Investigation report, at the Oak Ridge National Laboratory, Oak Ridge, Tennessee: Volume 2, Appendixes A and B

    SciTech Connect

    NONE

    1996-11-01

    This document contains Appendixes A ``Source Inventory Information for the Subbasins Evaluated for the White Oak Creek Watershed`` and B ``Human Health Risk Assessment for White Oak Creek / Melton Valley Area`` for the remedial investigation report for the White Oak Creek Watershed and Melton Valley Area. Appendix A identifies the waste types and contaminants for each subbasin in addition to the disposal methods. Appendix B identifies potential human health risks and hazards that may result from contaminants present in the different media within Oak Ridge National Laboratory sites.

  20. Rock magnetic properties of a soil developed on an alluvial deposit at Buttermilk Creek, Texas, USA

    NASA Astrophysics Data System (ADS)

    Lindquist, Anna K.; Feinberg, Joshua M.; Waters, Michael R.

    2011-12-01

    The evolution of magnetization within a floodplain soil begins with initial deposition of magnetic particles during sedimentation and continues via subsequent alteration and growth of iron-bearing compounds by pedogenic and biologic processes. Measurements of soil magnetic properties capture information about the developmental history of the soil and are a convenient method by which to investigate environmental change and pedogenesis. Using a range of magnetic measurements, a comprehensive scenario for soil development was constructed for floodplain sediments at the Debra L. Friedkin site, an important archeological site near Buttermilk Creek, Texas. Floodplain deposits have traditionally been avoided for soil magnetism studies because it is thought that the episodic input of sediment would form soils characterized by discrete sedimentary units rather than a continuous record of pedogenesis. We demonstrate that alluvial deposits can sometimes carry a straightforwardly interpretable magnetic signal similar to those typically seen in loess deposits. Smooth variation of rock magnetic parameters as a function of depth also leads us to conclude that the soil at this site is largely undisturbed and that the age of lithic artifacts found within the soil may be interpreted within stratigraphic context.

  1. Isotopic composition of ice cores and meltwater from upper fremont glacier and Galena Creek rock glacier, Wyoming

    USGS Publications Warehouse

    DeWayne, Cecil L.; Green, J.R.; Vogt, S.; Michel, R.; Cottrell, G.

    1998-01-01

    Meltwater runoff from glaciers can result from various sources, including recent precipitation and melted glacial ice. Determining the origin of the meltwater from glaciers through isotopic analysis can provide information about such things as the character and distribution of ablation on glaciers. A 9.4 m ice core and meltwater were collected in 1995 and 1996 at the glacigenic Galena Creek rock glacier in Wyoming's Absaroka Mountains. Measurements of chlorine-36 (36Cl), tritium (3H), sulphur-35 (35S), and delta oxygen-18 (??18O) were compared to similar measurements from an ice core taken from the Upper Fremont Glacier in the Wind River Range of Wyoming collected in 1991-95. Meltwater samples from three sites on the rock glacier yielded 36Cl concentrations that ranged from 2.1 ?? 1.0 X 106 to 5.8??0.3 X 106 atoms/l. The ice-core 36Cl concentrations from Galena Creek ranged from 3.4??0.3 X 105 to 1.0??0.1 X 106 atoms/l. Analysis of an ice core from the Upper Fremont Glacier yielded 36Cl concentrations of 1.2??0.2 X 106 and 5.2??0.2 X 106 atoms/l for pre- 1940 ice and between 2 X 106 and 3 X 106 atoms/l for post-1980 ice. Purdue's PRIME Lab analyzed the ice from the Upper Fremont Glacier. The highest concentration of 36Cl in the ice was 77 ?? 2 X 106 atoms/l and was deposited during the peak of atmospheric nuclear weapons testing in the late 1950s. This is an order of magnitude greater than the largest measured concentration from both the Upper Fremont Glacier ice core that was not affected by weapons testing fallout and the ice core collected from the Galena Creek rock glacier. Tritium concentrations from the rock glacier ranged from 9.2??0.6 to 13.2??0.8 tritium units (TU) in the meltwater to -1.3??1.3 TU in the ice core. Concentrations of 3H in the Upper Fremont Glacier ice core ranged from 0 TU in the ice older than 50 years to 6-12 TU in the ice deposited in the last 10 years. The maximum 3H concentration in ice from the Upper Fremont Glacier deposited in the early 1960s during peak weapons testing fallout for this isotope was 360 TU. One meltwater sample from the rock glacier was analyzed for 35S with a measured concentration of 5.4??1.0 millibecquerel per liter (mBeq/l). Modern precipitation in the Rocky Mountains contains 35S from 10 to 40 mBeq/L. The ??18O results in meltwater from the Galena Creek rock glacier (-17.40??0.1 to -17.98??0.1 per mil) are similar to results for modern precipitation in the Rocky Mountains. Comparison of these isotopic concentrations from the two glaciers suggest that the meltwater at the Galena Creek site is composed mostly of melted snow and rain that percolates through the rock debris that covers the glacier. Additionally, this water from the rock debris is much younger (less than two years) than the reported age of about 2000 years for the subsurface ice at the mid-glacier coring site. Thus the meltwater from the Galena Creek rock glacier is composed primarily of melted surface snow and rain water rather than melted glacier ice, supporting previous estimates of slow ablation rates beneath the surface debris of the rock glacier.

  2. Comagmatic contact relationships between the Rock Creek Gabbro and Round Valley Peak granodiorite, central Sierra Nevada, CA

    SciTech Connect

    Christensen, C.C.; Bown, C.J. (Hampshire College, Amherst, MA (United States). School of Natural Science)

    1993-03-01

    The Rock Creek Gabbro (RCG) in Little Lakes Valley, near Tom's Place, CA abuts three granodiorites with distinctive contact characteristics. Against within a cm in most places. The contact with Round Valley Peak (RVP) on the north, however, is a zone at least 3 km wide and records a mode of mafic magmatic enclave formation. A northward traverse of the zone begins 300--400 m within the RCG with progressively lighter, though still uniform rock. Next is a 100--200m wide jumble of sharp-edged angular 10--30m gabbroic xenoliths, variable in grainsize and plastic deformation and interspersed with stretched partially disaggregated enclaves in normal RVP granodiorite. Xenoliths are essentially absent from the RVP from here north; stretched enclaves with very consistent strikes paralleling (within 20[degree]) the mapped RCG-RVP contact and high angle dips (70--90[degree]), occur singly and in dense swarms and fall from 4% to 0.5% of outcrop area in the remaining traverse. Rock Creek gabbros including xenoliths at the contact cluster chemically with RVP enclaves on all major and trace element plots, suggesting a common parentage; some of each group show evidence of plagioclase flotation. Trace element data (esp. Zr/Nb) suggests that fractional crystallization dominates mixing in the evolution of the gabbroic/enclave magma.

  3. Food of white perch, rock bass and yellow perch in eastern Lake Ontario

    USGS Publications Warehouse

    Elrod, Joseph H.; Busch, Wolf-Dieter N.; Griswold, Bernard L.; Schneider, Clifford P.; Wolfert, David R.

    1981-01-01

    The contents of stomachs from 1,485 white perch, 218 rock bass and 1,399 yellow perch collected in eastern Lake Ontario from May to October in 1972 and in May 1973 were examined. All three species fed primarily on amphipods, but they also ate chironomids and trichopterans regularly. Rock bass ate more trichopterans than chironomids, whereas white perch and yellow perch ate more chironomids. Snails and crayfish were significant items in the diet of rock bass, but occurred infrequently in stomachs of white perch and yellow perch. White perch and yellow perch frequently ate fish eggs during early summer, but rock bass seldom ate fish eggs. Fish were important in the diets of white perch longer than 300 millimeters and rock bass and yellow perch longer than 200 millimeters. Similarities in the diets of fish 1 year old or older suggest that the potential for competition between white perch and yellow perch is greater than that between rock bass and either white perch or yellow perch.

  4. Selenium and Other Elements in Water and Adjacent Rock and Sediment of Toll Gate Creek, Aurora, Arapahoe County, Colorado, December 2003 through March 2004

    USGS Publications Warehouse

    Herring, J.R.; Walton-Day, Katherine

    2007-01-01

    Streamwater and solid samples (rock, unconsolidated sediment, stream sediment, and efflorescent material) in the Toll Gate Creek watershed, Colorado, were collected and analyzed for major and trace elements to determine trace-element concentrations and stream loads from December 2003 through March 2004, a period of seasonally low flow. Special emphasis was given to selenium (Se) concentrations because historic Se concentrations exceeded current (2004) stream standards. The goal of the project was to assess the distribution of Se concentration and loads in Toll Gate Creek and to determine the potential for rock and unconsolidated sediment in the basin to be sources of Se to the streamwater. Streamwater samples and discharge measurements were collected during December 2003 and March 2004 along Toll Gate Creek and its two primary tributaries - West Toll Gate Creek and East Toll Gate Creek. During both sampling periods, discharge ranged from 2.5 liters per second to 138 liters per second in the watershed. Discharge was greater in March 2004 than December 2003, but both periods represent low flow in Toll Gate Creek, and results of this study should not be extended to periods of higher flow. Discharge decreased moving downstream in East Toll Gate Creek but increased moving downstream along West Toll Gate Creek and the main stem of Toll Gate Creek, indicating that these two streams gain flow from ground water. Se concentrations in streamwater samples ranged from 7 to 70 micrograms per liter, were elevated in the upstream-most samples, and were greater than the State stream standard of 4.6 micrograms per liter. Se loads ranged from 6 grams per day to 250 grams per day, decreased in a downstream direction along East Toll Gate Creek, and increased in a downstream direction along West Toll Gate Creek and Toll Gate Creek. The largest Se-load increases occurred between two sampling locations on West Toll Gate Creek during both sampling periods and between the two sampling locations on the main stem of Toll Gate Creek during the December 2003 sampling. These load increases may indicate that sources of Se exist between these two locations; however, Se loading along West Toll Gate Creek and Toll Gate Creek primarily was characterized by gradual downstream increases in load. Linear regressions between Se load and discharge for both sampling periods had large, significant values of r2 (r2 > 0.96, p < 0.0001) because increases in Se load (per unit of flow increase) were generally constant. This relation is evidence for a constant addition of water having a relatively constant Se concentration over much of the length of Toll Gate Creek, a result which is consistent with a ground-water source for the Se loads. Rock outcroppings along the stream were highly weathered, and Se concentrations in rock and other solid samples ranged from below detection (1 part per million) to 25 parts per million. One sample of efflorescence (a surface encrustation produced by evaporation) had the greatest selenium concentration of all solid samples, was composed of thenardite (sodium sulfate), gypsum (calcium sulfate) and minor halite (sodium chloride), and released all of its Se during a 30-minute water-leaching procedure. Calculations indicate there was an insufficient amount of this material present throughout the watershed to account for the observed Se load in the stream. However, this material likely indicates zones of ground-water discharge that contain Se. This report did not identify an unequivocal source of Se in Toll Gate Creek. However, multiple lines of evidence indicate that ground-water discharge supplies Se to Toll Gate Creek: (1) the occurrence of elevated Se concentrations in the stream throughout the watershed and in the headwater regions, upstream from industrial sources; (2) the progressive increase in Se loads moving downstream, which indicates a continuous input of Se along the stream rather than input from point sources; (3) the occurr

  5. Geohydrology of White Rock Canyon of the Rio Grande from Otowi to Frijoles Canyon

    SciTech Connect

    Purtymun, W.D.; Peters, R.J.; Owens, J.W.

    1980-12-01

    Twenty-seven springs discharge from the Totavi Lentil and Tesuque Formation in White Rock Canyon. Water generally acquires its chemical characteristics from rock units that comprise the spring aquifer. Twenty-two of the springs are separated into three groups of similar aquifer-related chemical quality. The five remaining springs make up a fourth group with a chemical quality that differs due to localized conditions in the aquifer. Localized conditions may be related to recharge or discharge in or near basalt intrusion or through faults. Streams from Pajarito, Ancho, and Frijoles Canyons discharge into the Rio Grande in White Rock Canyon. The base flow in the streams is from springs. Sanitary effluent in Mortandad Canyon from the treatment plant at White Rock also reaches the Rio Grande.

  6. Oak Ridge National Laboratory Biological Monitoring and Abatement Program for White Oak Creek Watershed and the Clinch River

    SciTech Connect

    Loar, J.M.; Adams, S.M.; Allison, L.J.; Blaylock, B.G.; Boston, H.L.; Huston, M.A.; Kimmel, B.L.; Smith, J.G.; Southworth, G.R.; Stewart, A.J.; Walton, B.T.; Kitchings, J.T.; Olsen, C.R.

    1991-09-01

    On April 1, 1986, a National Pollutant Discharge Elimination System (NPDES) permit was issued for the Oak Ridge National Laboratory (ORNL) (EPA 1986). As specified in Part 3: Special Conditions (Item H) of the permit, a plan for biological monitoring of the Clinch River, White Oak Creek (WOC), Northwest Tributary (NWT) of WOC, Melton Branch (MB), Fifth Creek, and First Creek shall be submitted for approval to the US Environmental Protection Agency (EPA) and the Tennessee Department of Health and Environment (TDHE) within 90 days of the effective date of the permit. The plan, which is referred to in Part 3 (H) of the permit as the Biological Monitoring Plan and Abatement Program (BMPAP), describes characterization monitoring studies to be conducted for the duration of the permit (5 years). In order to be consistent with the terminology used for the Biological Monitoring and Abatement Programs for the Oak Ridge Y-12 Plan and the Oak Ridge K-25 Plant, BMPAP will subsequently be referred to as the Biological Monitoring and Abatement Program (BMAP). The proposed BMAP outlined in this document is based on preliminary discussions held on December 9, 1985, between staff of Martin Marietta Energy Systems, Inc. (ORNL and Central Management), the US Department of Energy (DOE), EPA, and TDHE. 232 refs., 11 figs., 7 tabs.

  7. 68. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    68. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: STRESS SHEET, SHEET 4; MAY, 1918. Littlerock Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  8. 69. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    69. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: REINFORCEMENT SHEET, SHEET 5; MAY, 1918. Littlerock Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  9. 66. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    66. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: DIMENSION SHEET, SECTION THROUGH CROWN, SHEET 6, APRIL, 1918. Littlerock Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  10. 65. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    65. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: UPSTREAM ELEVATION, SHEET 3; APRIL, 1918. Littlerock Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  11. 67. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    67. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: OUTLET GATES, CROWN SECTION, UPSTREAM ELEVATION AND DOWNSTREAM ELEVATION SHEET, SHEET 7; APRIL, 1918. Littlerock Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  12. 64. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    64. LITTLE ROCK AND PALMDALE IRRIGATION DISTRICT, LITTLE ROCK DAM: PLAN VIEW, SHEET 2; APRIL, 1918. Palmdale Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  13. Lower Rock Creek Enjoy a variety of seasons in Inyo National Forest

    E-print Network

    Harris, David Money

    to a cottonwood grove at 1.3 miles, where the black-and-white speckled granite walls of White Wash extend on your of The Trinity Alps: A Hiking and Backpacking Guide (Wilderness Press) Hike provided by David Money Harris

  14. Roof-rock contamination of Taylor Creek Rhyolite, New Mexico, as recorded in hornblende phenocrysts and biotite xenocrysts

    USGS Publications Warehouse

    Wittke, J.H.; Duffield, W.A.; Jones, C.

    1996-01-01

    The Taylor Creek Rhyolite, a group of coeval, mid-Tertiary, silica-rich rhyolite lava domes in southwestern New Mexico, is notable for recording bulk-rock evidence of minor, yet easily measurable, contamination of its source magma reservoir resulting from assimilation of Proterozoic roof rock. Most of the evidence is recorded in trace element concentrations and 87Sr/86Sri ratios, which are far different in unconlaminated magma and roof rocks. Hornblende phenocrysts and biotite xenocrysts also record the effects of contamination. Electron microprobe analyses show that all hornblende grains are zoned to Mg-rich and Fe- and Mn-poor rims. Rim MgO content is typically about 10 wt% greater than core MgO content. Other hornblende constituents are not measurably variable. Biotite xenocrysts, trace mineral constituents, are present only in the domes that are most contaminated, as judged by bulk-rock variations in trace element concentrations and 87Sr/ 86Sri. Biotite grains are invariably partly to almost completely altered. Microprobe analyses of the cores of the least-altered grains show that large variations in Fe and Mg and that biotite contains 2-20 times as much Mg as fresh biotite phenocrysts in other silica-rich rhyolite lavas. Fe and Mg are negatively correlated in hornblende and biotite, consistent with mixing two end-member compositions. The mass ratio of contaminant to magma was probably less than 1:100, and major constituents, including Al, were not measurably affected in hornblende. Al-in-hornblende barometry yields essentially a constant calculated pressure of about 1.5 kbar, which is consistent with the interpretation that all contamination occurred in a boundary zone about 300 m thick at the top of the magma reservoir.

  15. Paleomagnetism, Paleointensity, and Rock Magnetism of the 9.5 ka volcanics of Sulfur Creek, Mt. Baker, WA

    NASA Astrophysics Data System (ADS)

    Housen, B. A.; Burmester, R. F.; Deboer, C. J.; Hart, A.; Mcguire, Z. J.; Novak, B.; Zyczynski, J.

    2011-12-01

    We report results obtained from an initial study of the paleomagnetism and rock-magnetism of basaltic to basaltic-andesite flows- the volcanics of Sulfur Creek associated with the Mt. Baker composite volcano, in NW Washington State. The age of these rocks are constrained by the ages of 8800 14C yrs BP tephra deposits that underlie the lava flows, and 8500 14C years BP from lahar deposits that overlie the flows (see Tucker and Scott, 2009). For this study, 21 oriented samples were collected from 3 sites located along a 100 m wide road-cut exposure of the basalts. Thermal and a.f. demagnetization were successful- yielding well-defined magnetization vectors. The characteristic remanence was removed between 140 and 500 C in the majority of the samples. Most of the samples have normal polarity, and yield a combined mean direction from the 3 sites with Dec = 12, Incl = 51, k = 116, ?95 = 11. One sample has an upward-directed characteristic magnetization (D = 178 and Incl = -45) that is essentially antipodal to the directions found in the other samples. Given the age of these rocks, we concluded that a recording of a geomagnetic excursion was not likely. An investigation of the rock-magnetism, mainly of the Curie temperatures, found that the Tc of these rocks is ~540 C, with some samples also having a drop in Ms between 200 and 300 C. To test more definitively for the possibility of self-reversed TRM, we conducted laboratory TRM acquisition experiments on samples from each site- all, including a specimen from the sample with reversed directions, acquired a laboratory TRM that was parallel to the applied field in the oven- ruling out self-reversed TRM. Examination of the NRM intensities found that the sample with reversed direction was markedly more magnetic than the other samples- we thus attribute the anomalous direction to lightning-produced magnetization. Because these samples have well-behaved magnetic properties, we conducted an initial set of paleointensity experiments using the modified Thellier-Thellier method. The samples were heated in an oven with an Ar atmosphere, using steps from 140 to 450 C for the demagnetization and pTRM steps. The results from 9/10 samples yielded well-defined linear relationships between the NRM demagnetization and pTRM gain, over the range from 140 to 400 C. Using 6 to 7 temperature steps, best-fit lines were used to estimate the paleointensity of the geomagnetic field, obtaining a paleofield of 35.1 +/- 6 ?T. We conclude that the apparently reversed polarity direction found in one portion of the lava flow we sampled may suggest a note of caution in the use of NRMs (especially measured in the field using a portable magnetometer) to map and correlate among different volcanic flows, or in investigations that use small numbers of samples to define magnetic polarity. Finally, the basaltic flows of Mt. Baker have well-behaved magnetizations- this suggests that these and other similar Holocene volcanics in the Cascades Arc may be attractive targets of full-vector investigations of the geomagnetic field in this region.

  16. Breeding habitat selection of sympatric White-tailed, Rock and Willow Ptarmigan in the southern Yukon Territory, Canada

    Microsoft Academic Search

    Scott Wilson; Kathy Martin

    2008-01-01

    We examined breeding habitat selection at two scales for White-tailed (Lagopus leucura), Rock (L. muta), and Willow Ptarmigan (L. lagopus) at an alpine site in the Ruby Range Mountains of the Yukon Territory, Canada. To infer species-specific preferences, we\\u000a used logistic regression and AIC model selection to compare nest habitat of White-tailed (n = 43) and Rock Ptarmigan (n = 58). Only descriptive statistics

  17. Rocks

    NSDL National Science Digital Library

    Mrs. Woodruff

    2010-06-21

    This year we are going to learn about rocks. Do you like to collect rocks? Rocks are the most common material on earth. We will learn about the parts that make up the rocks and sort rocks based upon color, hardness, texture, layering, and particle size. So you want to learn about rocks? Go to Intro to Rocks for some fascinating facts about rocks! Now lets learn about some of the different kinds of rocks. Igneous Rocks Metamorphic Rocks Sedimentary Rocks Click here to see the differences between the types of rocks that you have learned about What Type Of Rock Do I Have?. After doing all the activities above, ...

  18. Long-term water quality and biological responses to multiple best management practices in Rock Creek, Idaho

    USGS Publications Warehouse

    Maret, T.R.; MacCoy, D.E.; Carlisle, D.M.

    2008-01-01

    Water quality and macroinvertebrate assemblage data from 1981 to 2005 were assessed to evaluate the water quality and biological responses of a western trout stream to the implementation of multiple best management practices (BMPs) on irrigated cropland. Data from Rock Creek near Twin Falls, Idaho, a long-term monitoring site, were assembled from state and federal sources to provide the evaluation. Seasonal loads of the nonpoint source pollutants suspended sediment (SS), total phosphorus (TP), and nitrate-nitrite (NN) were estimated using a regression model with time-series streamflow data and constituent concentrations. Trends in the macroinvertebrate assemblages were evaluated using a number of biological metrics and nonmetric multidimensional scaling ordination. Regression analysis found significant annual decreases in TP and SS flow-adjusted concentrations during the BMP implementation period from 1983 to 1990 of about 7 and 10%, respectively. These results are coincident with the implementation of multiple BMPs on about 75% of the irrigated cropland in the watershed. Macroinvertebrate assemblages during this time also responded with a change in taxa composition resulting in improved biotic index scores. Taxon specific TP and SS optima, empirically derived from a large national dataset, predicted a decrease in SS concentrations of about 37% (52 to 33 mg/l) and a decrease in TP concentrations of about 50% (0.20 to 0.10 mg/l) from 1981 to 1987. Decreasing trends in TP, SS, and NN pollutant loads were primarily the result of naturally low streamflow conditions during the BMP post-implementation period from 1993 to 2005. Trends in macroinvertebrate responses during 1993 to 2005 were confounded by the introduction of the New Zealand mudsnail (Potamopyrgus antipodarum), which approached densities of 100,000 per m 2 in riffle habitat. The occurrence of this invasive species appears to have caused a major shift in composition and function of the macroinvertebrate assemblages. ?? 2008 American Water Resources Association.

  19. White Oak Creek Watershed: Melton Valley Area Remedial Investigation Report, Oak Ridge National Laboratory, Oak Ridge, Tennessee: Volume 3 Appendix C

    SciTech Connect

    NONE

    1996-11-01

    This report provides details on the baseline ecological risk assessment conducted in support of the Remedial Investigation (RI) Report for the Melton Valley areas of the White Oak Creek watershed (WOCW). The RI presents an analysis meant to enable the US Department of Energy (DOE) to pursue a series of remedial actions resulting in site cleanup and stabilization. The ecological risk assessment builds off of the WOCW screening ecological risk assessment. All information available for contaminated sites under the jurisdiction of the US Department of Energy`s Comprehensive Environmental Response, Compensation, and Liability Act Federal Facilities Agreement within the White Oak Creek (WOC) RI area has been used to identify areas of potential concern with respect to the presence of contamination posing a potential risk to ecological receptors within the Melton Valley area of the White Oak Creek watershed. The risk assessment report evaluates the potential risks to receptors within each subbasin of the watershed as well as at a watershed-wide scale. The WOC system has been exposed to contaminant releases from Oak Ridge National Laboratory and associated operations since 1943 and continues to receive contaminants from adjacent waste area groupings.

  20. Landslides and other mass movements near TA-33, northern White Rock Canyon, New Mexico. Final report

    SciTech Connect

    Dethier, D.P.

    1993-09-01

    Massive slump complexes and at least two rock avalanches flank the eastern rim of the Pajarito Plateau along northern White Rock Canyon, north of TA-33. Landslides failed along mechanically weak rocks in the Santa Fe Group, within the Puye Formation, or in Pliocene alluvial and lacustrine units. The landslides are mainly of early or middle Pleistocene age. The toe area of at least,one slump complex has been active in the late Pleistocene, damming White Rock Canyon near the mouth of Water Canyon. Lacustrine sediment that filled this lake, or series of lakes, to an elevation of at least 1710 m is preserved at a number of upstream sites, including a deposit near the Buckman townsite that exposes 30 m of lacustrine sediment. Charcoal collected at several sites has been submitted for {sup 14}C dating. Landslides, however, probably do not represent a significant short-term threat to the material disposal areas at TA-33. Bedrock that lies beneath the TA-33 mesa is relatively stable, the mesa shows no signs of incipient failure, and past periods of slide activity were responses to rapid downcutting of the Rio Grande and climate change, probably over periods of several decades, at least. Rockfall and headward erosion of gullies do not represent significant decadal hazards on canyon rims near TA-33. Gully migration near MDA-K is a potential threat, but the gullies were not examined in detail. A system of north-trending faults, at least one of which displays Pleistocene activity, bisects the TA-33 mesa. If these faults are capable of producing significant seismic shaking, generalizations about landslide and rockfall hazards must be reevaluated.

  1. Effective porosity and density of carbonate rocks (Maynardville Limestone and Copper Ridge Dolomite) within Bear Creek Valley on the Oak Ridge Reservation based on modern petrophysical techniques

    SciTech Connect

    Dorsch, J.

    1997-02-01

    The purpose of this study is to provide quantitative data on effective porosity of carbonate rock from the Maynardville Limestone and Copper Ridge Dolomite within Bear Creek Valley based on modern petrophysical techniques. The data will be useful for groundwater-flow and contaminant-flow modeling in the vicinity of the Y-12 Plant on the Oak Ridge Reservation (ORR). Furthermore, the data provides needed information on the amount of interconnected pore space potentially available for operation of matrix diffusion as a transport process within the fractured carbonate rock. A second aspect of this study is to compare effective porosity data based on modern petrophysical techniques to effective porosity data determined earlier by Goldstrand et al. (1995) with a different technique. An added bonus of the study is quantitative data on the bulk density and grain density of dolostone and limestone of the Maynardville Limestone and Copper Ridge Dolomite which might find use for geophysical modeling on the ORR.

  2. 75 FR 8895 - Basin Electric Power Cooperative: Deer Creek Station

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-26

    ...Service Basin Electric Power Cooperative: Deer Creek Station AGENCY: Rural Utilities...Impact Statement (DEIS) for the proposed Deer Creek Station in White, Brookings County...construct the proposed 300 megawatt (MW) Deer Creek Station in Brookings and Deuel...

  3. Waste area grouping 2 Phase I task data report: Ecological risk assessment and White Oak Creek watershed screening ecological risk assessment

    SciTech Connect

    Efroymson, R.A.; Jackson, B.L.; Jones, D.S. [and others] [and others

    1996-05-01

    This report presents an ecological risk assessment for Waste Area Grouping (WAG) 2 based on the data collected in the Phase I remedial investigation (RI). It serves as an update to the WAG 2 screening ecological risk assessment that was performed using historic data. In addition to identifying potential ecological risks in WAG 2 that may require additional data collection, this report serves to determine whether there are ecological risks of sufficient magnitude to require a removal action or some other expedited remedial process. WAG 2 consists of White Oak Creek (WOC) and its tributaries downstream of the Oak Ridge National Laboratory (ORNL) main plant area, White Oak Lake (WOL), the White Oak Creek Embayment of the Clinch River, associated flood plains, and the associated groundwater. The WOC system drains the WOC watershed, an area of approximately 16.8 km{sup 2} that includes ORNL and associated WAGs. The WOC system has been exposed to contaminants released from ORNL and associated operations since 1943 and continues to receive contaminants from adjacent WAGs.

  4. Geohydrology and simulation of ground-water flow in the carbonate rocks of the Valley Creek basin, eastern Chester County, Pennsylvania

    USGS Publications Warehouse

    Sloto, R.A.

    1990-01-01

    Sixty-eight percent of the 22.6-square-mile Valley Creek basin is underlain by Cambrian and Ordovician limestone and dolomite. Ground water flows through a network of interconnected secondary openings; primary porosity is virtually nonexistent. Some of these openings have been enlarged by solution. Secondary porosity and permeability exhibit great spatial variability, and the yield and specific capacity of wells are highly variable. The number of water-bearing zones decreases with depth. Fifty percent of water-bearing zones are encountered within 100 feet of the land surface, and 81 percent are within 200 feet. Most ground-water flow in the Valley Creek basin is local and discharges to nearby streams. Ground-water discharge comprised an average of 76 percent of the flow of Valley Creek during 1983--87, including both natural ground- water discharge and quarry pumpage discharged to Valley Creek. Discharge from the Cedar Hollow quarry comprised 21 to 26 percent of the base flow of Valley Creek; the average was 23 percent. The average natural base flow of Valley Creek would be 8 percent lower if the quarry were not operating. Regional ground-water flow is to the northeast to the Schuylkill River. On the western side of the Valley Creek basin, the ground-water divide is 1/2 mile west of the surface-water divide. An estimated 0.75 million gallons per day of ground water flows from the adjacent West Valley Creek basn eastward into the Valley Creek basin. A ground-water divide is not present on the eastern side of the basin; the water table slopes gently eastward toward the Schuylkill River. On the northeaster side, an estimated 1.76 million gallons per day of ground water flows northeastward out of the basin to the Schuylkill River beneath the surface-water divide. On the southeaster side, an estimated 0.85 million gallons per day of ground water flows beneath the surface-water divide into the basin. Annual water budgets and an average water budget were calculated for 1983-87 for the 20.8-square-mile area bove the streamflow-gaging station. Annual precipitation for 1983-87 ranged from 40.61 to 56.55 inches and averaged 47.25 inches; annual streamflow ranged from 15.55 to 28.57 inches and averaged 22.31 inches; annual evapotranspiration ranged from 18.21 to 24.83 inches and averaged 22.90 inches; and annual recharge ranged from 15.89 to 26.84 inches and averaged 21.04 inches. The Valley Creek basin was modeled as a two-dimensional water-table aquifer. Recharge to, ground-water flow through, and discharge from the rocks of Chester valley were simulated. In order to include the natural hydrologic boundaries of the ground-water-flwo system, the 66.4-square-mile area between the Brandywine Creek and the Schuylkill River was modeled. The model was calibrated under stead-state conditions using avareage recharge and evapotranspiration rates. Aquifer hydraulic conductivity was estimated from specific-capacity and quifer-test data. The average (1983-87) annual water budget for hte Valley Creek basin was simualted. The effect of increased ground-water development on base flow and underflow was simulated by locating a hypothetical well field produceing 4 million gallons per day in different parts of the basin. Pumpage from a well field near surface-water divides would induce as much as an additional 1.41 inches per year of underflow from an adjacent surface-water basin. Pumpage from a well field near the center of the basin would affect base flow more than underflow. Increased seepage of ground water into quarries as a result of their expansion was simulated as increased withdrawal by pumping. A 100-percent increase in the pumping rate of the Cedar Hollow quarry, from 3.93 to 7.86 million gallons per day, owuld reduce the natural base flow of Valley Creek by 18 percent. However, the quarry pumpage would be discharged to Valley Creek, thereby increasing the base flow at the gaging station by

  5. Hydrogeology and ground-water flow, fractured Mesozoic structural-basin rocks, Stony Brook, Beden Brook, and Jacobs Creek drainage basins, west-central New Jersey

    USGS Publications Warehouse

    Lewis, Jean C.; Jacobsen, Eric

    1995-01-01

    This study was undertaken to characterize ground- water flow in the Stony Brook, Beden Brook, and Jacobs Creek drainage basins in west-central New Jersey. The 89-square-mile study area is underlain by dipping beds of fractured siltstone, shale, and sandstone and by massive diabase sills. In all of the rocks, the density of interconnected fractures decreases with depth. A major fault extends through the study area, and rocks on both sides of the fault are extensively fractured. The average annual rates of precipitation and ground-water recharge in the study area are 45.07 inches and 8.58 inches, respectively. The rate of recharge to diabase rocks is about one-half the rate of recharge to other rocks. Part of the surface runoff from diabase rocks enters the ground-water system where it encounters more permeable rocks. Most ground water in the study area follows short, shallow flow paths. A three- dimensional finite-difference model of ground-water flow was developed to test hypotheses concerning geologic features that control ground-water flow in the study area. The decrease in the density of interconnected fractures with depth was represented by dividing the model into two layers with different hydraulic conductivity. The pinching out of water- bearing beds in the dip direction at land surface and at depth was simulated as a lower hydraulic conductivity in the dip direction than in the strike direction. This model can be used to analyze ground-water flow if the area of interest is more than about 0.5 square mile.

  6. Geology of the Bee Branch-Mill Creek area, Mason County, Texas 

    E-print Network

    Miller, George Howard

    1957-01-01

    Creak Area contains approxhsately twenty square niles on the extrene southwest flank of the Llano up- lift, The suri'aoe rocks oonsist of line, "-tones, dolonites, sbslas, silt stones, and sandstones that range in age fron Late Csnbrian to Pennsyl... strata found in structural depressicns. LOCATION ABD ACCESSIBILITY Mason County is located in Central Texas, The Bee Branch- Xill Creek area lies approxinately seven niles southwest of Mason& Texas. white&s Crossing on the Llano river ad...

  7. Audiomagnetotelluric data to characterize the Revett-type copper-silver deposits at Rock Creek in the Cabinet Mountains Wilderness, Montana

    USGS Publications Warehouse

    Sampson, Jay A.; Rodriguez, Brian D.

    2011-01-01

    The Revett-type deposits at Rock Creek are part of the concealed stratabound copper-silver deposits located in the Cabinet Mountains Wilderness of Montana. The U.S. Geological Survey is conducting a series of multidisciplinary studies as part of the Assessment Techniques for Concealed Mineral Resources project. Geologic, geochemical, geophysical, and mineral resources data are being evaluated with existing and new mineral deposit models to predict the possibility and probability of undiscovered deposits in covered terranes. To help characterize the size, resistivity, and depth of the mineral deposit concealed beneath thick overburden, a regional southwest-northeast audiomagnetotelluric sounding profile was acquired. Further studies will attempt to determine if induced polarization parameters can be extracted from the magnetotelluric data to determine the size of the mineralized area. The purpose of this report is to release the audiomagnetotelluric sounding data collected along that southwest-northeast profile. No interpretation of the data is included.

  8. Rocks

    NSDL National Science Digital Library

    Michael Passow

    This slide show provides basic information on the three major rock types and the rock cycle. Diagrams of the rock cycle explain the processes and changes that connect the three rock types and illustrate how one type can be changed into another. Each of the three types (sedimentary, igneous, metamorphic) are described and illustrated with photographs. Addresses for websites with additional information are also included.

  9. Multifractal magnetic susceptibility distribution models of hydrothermally altered rocks in the Needle Creek Igneous Center of the Absaroka Mountains, Wyoming

    USGS Publications Warehouse

    Gettings, M.E.

    2005-01-01

    Magnetic susceptibility was measured for 700 samples of drill core from thirteen drill holes in the porphyry copper-molybdenum deposit of the Stinkingwater mining district in the Absaroka Mountains, Wyoming. The magnetic susceptibility measurements, chemical analyses, and alteration class provided a database for study of magnetic susceptibility in these altered rocks. The distribution of the magnetic susceptibilities for all samples is multi-modal, with overlapping peaked distributions for samples in the propylitic and phyllic alteration class, a tail of higher susceptibilities for potassic alteration, and an approximately uniform distribution over a narrow range at the highest susceptibilities for unaltered rocks. Samples from all alteration and mineralization classes show susceptibilities across a wide range of values. Samples with secondary (supergene) alteration due to oxidation or enrichment show lower susceptibilities than primary (hypogene) alteration rock. Observed magnetic susceptibility variations and the monolithological character of the host rock suggest that the variations are due to varying degrees of alteration of blocks of rock between fractures that conducted hydrothermal fluids. Alteration of rock from the fractures inward progressively reduces the bulk magnetic susceptibility of the rock. The model introduced in this paper consists of a simulation of the fracture pattern and a simulation of the alteration of the rock between fractures. A multifractal model generated from multiplicative cascades with unequal ratios produces distributions statistically similar to the observed distributions. The reduction in susceptibility in the altered rocks was modelled as a diffusion process operating on the fracture distribution support. The average magnetic susceptibility was then computed for each block. For the purpose of comparing the model results with observation, the simulated magnetic susceptibilities were then averaged over the same interval as the measured data. Comparisons of the model and data from drillholes show good but not perfect agreement. ?? 2005 Author(s). This work is licensed under a Creative Commons License.

  10. Rocks.

    ERIC Educational Resources Information Center

    Lee, Alice

    This science unit is designed for limited- and non-English speaking students in a Chinese bilingual education program. The unit covers rock material, classification, characteristics of types of rocks, and rock cycles. It is written in Chinese and simple English. At the end of the unit there is a list of main terms in both English and Chinese, and…

  11. Yosemite Creek

    USGS Multimedia Gallery

    In this image, Yosemite Creek may be seen just below the base of Yosemite Falls. Yosemite Creek is a 31.2 mile long creek in Yosemite National Park. It eventually joins with the Merced River in Yosemite Valley....

  12. Clinoptilolite and associated authigenic minerals in Miocene tuffaceous rocks in the Goose Creek Basin, Cassia County, Idaho

    SciTech Connect

    Brownfield, M.E.; Hildebrand, R.T.

    1985-01-01

    Miocene tuffaceous fluviolacustrine deposits in the southeastern part of the Goose Creek basin contain a variety of authigenic minerals, including clinoptilolite, smectite, pyrite, gypsum, and calcite. Clinoptilolite is the primary mineral in the diagenetically altered rhyolitic vitric tuffs in the study area. These zeolitic tuffs locally attain thicknesses of as much as 30 meters. Examinations of samples of the altered tuff beds using the scanning electron microscope reveal that the clinoptilolite usually occurs as clean, well-formed tabular crystals about 0.005 mm across in a matrix of smectite. Prismatic clinoptilolite crystals, as much as 0.06 mm long, are present in the larger vugs. During the Miocene, thick beds of air-fall rhyolitic vitric volcanic ash accumulated in the Goose Creek basin in a coalescing fluviolacustrine depositional setting. In the southeastern part of the basin, the volcanic ash was deposited in a lacustrine fan delta, where it was partly reworked and interbedded with sandstone and siltstone. Diagenetic alteration of the ash beds proceeded in an open hydrologic system. Solution and hydrolysis by ground water initially altered the glass shards to form smectite and silica gel. Clinoptilolite subsequently precipitated on the altered shard surfaces. The paragenesis of pyrite, gypsum, and calcite in the zeolitic tuffs is uncertain.

  13. Yuccas in Pine Creek Canyon

    USGS Multimedia Gallery

    The Mojave Desert, home to drought-tolerant plants like yuccas, gradually mixes with loblolly pine ecosystems in Pine Creek Canyon. Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Cany...

  14. Rocks

    NSDL National Science Digital Library

    This lesson plan is part of the DiscoverySchool.com lesson plan library for grades 6-8. This lesson focuses on sedimentary rocks and how they are formed. Students review the rock cycle and three rock types: igneous, metamorphic and sedimentary. They then write children's books about sedimentary rocks to explain the process to a younger audience. Included are objectives, materials, procedures, discussion questions, evaluation ideas, performing extensions, suggested readings, and vocabulary. Also available are videos which complement this lesson, audio vocabulary, and links to teaching tools for making custom quizzes, worksheets, puzzles and lesson plans.

  15. PALMDALE WATER COMPANY, LITTLE ROCK DAM: REINFORCEMENT, SECTION THROUGH ARCH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    PALMDALE WATER COMPANY, LITTLE ROCK DAM: REINFORCEMENT, SECTION THROUGH ARCH RING, AMENDED SHEET 6; SEPTEMBER, 1922. Palmdale Water District files - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  16. 81. PALMDALE WATER COMPANY, LITTLE ROCK DAM: REINFORCEMENT, SECTION THROUGH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    81. PALMDALE WATER COMPANY, LITTLE ROCK DAM: REINFORCEMENT, SECTION THROUGH ARCH RING, AMENDED SHEET 6; SEPTEMBER, 1922. Palmdale Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  17. 80. LITTLE ROCK DAM: DIMENSIONS, SECTION THROUGH ARCH RING, AMENDED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    80. LITTLE ROCK DAM: DIMENSIONS, SECTION THROUGH ARCH RING, AMENDED SHEET 5; SEPTEMBER, 1922. Palmdale Water District files. - Little Rock Creek Dam, Little Rock Creek, Littlerock, Los Angeles County, CA

  18. Maintenance action readiness assessment plan for White Oak Creek and Melton Branch Weir Stilling Pool cleanout at Oak Ridge National Laboratory

    SciTech Connect

    NONE

    1995-08-01

    This Readiness Assessment Plan has been prepared to document operational readiness for the following maintenance action: (1) removal of sediment from the White Oak Creek and Melton Branch Weir Stilling Pools and (2) disposal of the radiologically contaminated sediment in another location upstream of the weirs in an area previously contaminated by stream overflow from Melton Branch in Waste Area Grouping 2 (WAG) at Oak Ridge National Laboratory. This project is being performed as a maintenance action rather than an action under the Comprehensive Environmental Response, Compensation, and Liability Act because the risk to human health and environment is well below the US Environmental Protection Agency`s level of concern. The decision to proceed as a maintenance action was documented by an interim action proposed plan, which is included in the administrative record. The administrative record is available for review at the US Department of Energy Information Resource Center, 105 Broadway Avenue, Oak Ridge, Tennessee 37830.

  19. Multifractal magnetic susceptibility distribution models of hydrothermally altered rocks in the Needle Creek Igneous Center of the Absaroka Mountains, Wyoming

    Microsoft Academic Search

    M. E. Gettings

    2005-01-01

    Magnetic susceptibility was measured for 700 samples of drill core from thirteen drill holes in the porphyry copper-molybdenum deposit of the Stinkingwater mining district in the Absaroka Mountains, Wyoming. The mag- netic susceptibility measurements, chemical analyses, and alteration class provided a database for study of magnetic susceptibility in these altered rocks. The distribution of the magnetic susceptibilities for all samples

  20. Multifractal magnetic susceptibility distribution models of hydrothermally altered rocks in the Needle Creek Igneous Center of the Absaroka Mountains, Wyoming

    Microsoft Academic Search

    M. E. Gettings

    2005-01-01

    Magnetic susceptibility was measured for 700 samples of drill core from thirteen drill holes in the porphyry copper-molybdenum deposit of the Stinkingwater mining district in the Absaroka Mountains, Wyoming. The magnetic susceptibility measurements, chemical analyses, and alteration class provided a database for study of magnetic susceptibility in these altered rocks. The distribution of the magnetic susceptibilities for all samples is

  1. Rocks

    NSDL National Science Digital Library

    National Science Teachers Association (NSTA)

    2009-07-01

    This guide explores rocks, from processes that can change them (such as weathering), to what can happen to them as they move through the rock cycle. Using this guide, teachers of middle school students will focus on the tangible process of sedimentary roc

  2. Water-Quality Characteristics of Cottonwood Creek, Taggart Creek, Lake Creek, and Granite Creek, Grand Teton National Park, Wyoming, 2006

    USGS Publications Warehouse

    Clark, Melanie L.; Wheeler, Jerrod D.; O'Ney, Susan E.

    2007-01-01

    To address water-resource management objectives of the National Park Service in Grand Teton National Park, the U.S. Geological Survey in cooperation with the National Park Service has conducted water-quality sampling on streams in the Snake River headwaters area. A synoptic study of streams in the western part of the headwaters area was conducted during 2006. Sampling sites were located on Cottonwood Creek, Taggart Creek, Lake Creek, and Granite Creek. Sampling events in June, July, August, and October were selected to characterize different hydrologic conditions and different recreational-use periods. Stream samples were collected and analyzed for field measurements, major-ion chemistry, nutrients, selected trace elements, pesticides, and suspended sediment. Water types of Cottonwood Creek, Taggart Creek, Lake Creek, and Granite Creek were calcium bicarbonate. Dissolved-solids concentrations were dilute in Cottonwood Creek and Taggart Creek, which drain Precambrian-era rocks and materials derived from these rocks. Dissolved-solids concentrations ranged from 11 to 31 milligrams per liter for samples collected from Cottonwood Creek and Taggart Creek. Dissolved-solids concentrations ranged from 55 to 130 milligrams per liter for samples collected from Lake Creek and Granite Creek, which drain Precambrian-era rocks and Paleozoic-era rocks and materials derived from these rocks. Nutrient concentrations generally were small in samples collected from Cottonwood Creek, Taggart Creek, Lake Creek, and Granite Creek. Dissolved-nitrate concentrations were the largest in Taggart Creek. The Taggart Creek drainage basin has the largest percentage of barren land cover of the basins, and subsurface waters of talus slopes may contribute to dissolved-nitrate concentrations in Taggart Creek. Pesticide concentrations, trace-element concentrations, and suspended-sediment concentrations generally were less than laboratory reporting levels or were small for all samples. Water-quality characteristics of streams in the western part of the Snake River headwaters area were compared to water-quality characteristics of streams sampled in 2002 in the eastern part of the headwaters area. The median dissolved-solids concentration (55 milligrams per liter) for samples collected from western streams was smaller than the median dissolved-solids concentration (125 milligrams per liter) for samples collected from eastern streams. The small dissolved-solids concentrations in the western streams are a result of the large areas underlain by resistant Precambrian-era rocks that compose the Teton Range compared to the more erodable Mesozoic-era sedimentary rocks that compose the mountains in the eastern part of the headwaters area. The Teton Range also receives higher annual precipitation than the mountains in the east. The median total-nitrogen concentration (0.17 milligram per liter) in samples collected from streams in the western part of the Snake River headwaters area was larger than the median concentration (0.10 milligram per liter) for samples collected from streams in the eastern part of the headwaters area, in part because of larger dissolved-nitrate concentrations in samples from the western streams compared to the eastern streams. In contrast, total-phosphorus concentrations generally were larger for samples collected from eastern streams. Large total-phosphorus concentrations in the eastern streams were associated with large suspended-sediment concentrations. The source of the phosphorus and sediment probably is Mesozoic-era sedimentary rocks of marine origin that underlie parts of the eastern drainage basins.

  3. Effect of Tribulus terrestris extract on semen quality and serum total cholesterol content in White Plymouth Rock-mini cocks

    Microsoft Academic Search

    S. Grigorova; B. Kashamov; V. Sredkova; S. Surdjiiska; H. Zlatev

    2008-01-01

    Tribulus terrestris extract was added to the water of 10 cocks from the population White Plymouth Rock - mini cocks once daily in dose 10mg\\/kg body weight for a period of 11weeks. The trial lasted 20 weeks-1week preparatory and 19 weeks experimental period. Eight weeks of the experimental period were intended to measure the aftereffect of the tested product. It

  4. 40Ar/39Ar Data for White Mica, Biotite, and K-Feldspar Samples from Low-Grade Metamorphic Rocks in the Westminster Terrane and Adjacent Rocks, Maryland

    USGS Publications Warehouse

    Kunk, Michael J.; McAleer, Ryan

    2008-01-01

    This report contains reduced 40Ar/39Ar data of white mica and K-feldspar mineral separates and matrix of a whole rock phyllite, all from low-grade metamorphic rocks of the Westminster terrane and adjacent strata in central Maryland. This report presents these data in a preliminary form, but in more detail than can be accommodated in todays professional journals. Also included in this report is information on the location of the samples and a brief description of the samples. The data contained herein are not interpreted in a geological context, and care should be taken by readers unfamiliar with argon isotopic data in the use of these results; many of the individual apparent ages are not geologically meaningful. This report is primarily a detailed source document for subsequent publications that will integrate these data into a geological context.

  5. Aquia Creek Sandstone

    USGS Multimedia Gallery

    This Aquia Creek Sandstone originated from a quarry about 40 miles south of Washington, D.C., in Stafford County, Va. This type of stone was used in the construction of many of D.C.'s most famous landmarks, including the White House and the U.S. Capitol building....

  6. Validated analytical data summary report for White Oak Creek Watershed remedial investigation supplemental sampling, Oak Ridge National Laboratory, Oak Ridge, Tennessee

    SciTech Connect

    NONE

    1996-09-01

    CDM Federal Programs Corporation (CDM Federal) was tasked by the Environmental Restoration Program of Lockheed Martin Energy Systems Inc. (Energy Systems), to collect supplemental surface soil data for the remedial investigation/feasibility study (RI/FS) for the White Oak Creek (WOC) watershed. The WOC watershed RI/FS is being conducted to define a remediation approach for complying with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) at Oak Ridge National Laboratory (ORNL). The data generated from these supplemental sampling activities will be incorporated into the RUFS to aid decision makers and stakeholders with the selection of remedial alternatives and establish remediation goals for the WOC watershed. A series of Data Quality Objective (DQO) meetings were held in February 1996 to determine data needs for the WOC watershed RI/FS. The meetings were attended by representatives from the Tennessee Department of Environment and Conservation, the U.S. Environmental Protection Agency (EPA), the U.S. Department of Energy (DOE), and contractors to DOE. During the DQO meetings, it was determined that the human health risk associated with exposure to radionuclides was high enough to establish a baseline for action; however, it was also determined that the impacts associated with other analytes (mainly metals) were insufficient for determining the baseline ecological risk. Based on this premise, it was determined that additional sampling would be required at four of the Waste Area Groupings (WAGs) included in the WOC watershed to fulfill this data gap.

  7. Annual hydrologic data summary for the White Oak Creek Watershed: Water Year 1990 (October 1989--September 1990)

    SciTech Connect

    Borders, D.M.; Gregory, S.M.; Clapp, R.B.; Frederick, B.J.; Moore, G.K.; Watts, J.A.; Broders, C.C.; Bednarek, A.T.

    1991-09-01

    This report summarizes, for the Water Year 1990 (October 1989-- September 1990), the dynamic hydrologic data collected on the Whiteoak Creek (WOC) Watershed's surface and subsurface flow systems. These systems affect the quality or quantity of surface water and groundwater. The collection of hydrologic data is one component of numerous, ongoing Oak Ridge National Laboratory (ORNL) environmental studies and monitoring programs and is intended to 1. characterize the quantity and quality of water in the flow system, 2. plan and assess remedial action activities, and 3. provide long-term availability of data and assure quality. Characterizing the hydrology of the WOC watershed provides a better understanding of the processes which drive contaminant transport in the watershed. Identifying of spatial and temporal trends in hydrologic parameters and mechanisms that affect the movement of contaminants supports the development of interim corrective measures and remedial restoration alternatives. Hydrologic monitoring supports long-term assessment of the effectiveness of remedial actions in limiting the transport of contaminants across Waste Area Grouping boundaries and ultimately to the off-site environment. The majority of the data summarized in this report are available from the Remedial Action Programs Data and Information Management System data base. Surface water data available within the WOC flow system include discharge and runoff, surface water quality, radiological and chemical contamination of sediments, and descriptions of the outfalls to the WOC flow system. Climatological data available for the Oak Ridge area include precipitation, temperature, humidity, wind speed, and wind direction. Information on groundwater levels, aquifer characteristics, and groundwater quality are presented. Anomalies in the data and problems with monitoring and accuracy are discussed. 58 refs., 54 figs., 15 tabs.

  8. A Peek into 'Alamogordo Creek'

    NASA Technical Reports Server (NTRS)

    2006-01-01

    [figure removed for brevity, see original site] [figure removed for brevity, see original site] [figure removed for brevity, see original site] Figure 1Figure 2Figure 3

    On its 825th Martian day (May 20, 2006), NASA's Mars Exploration Rover Opportunity stopped for the weekend to place its instrument arm onto the soil target pictured here, dubbed 'Alamogordo Creek.' Two views from the panoramic camera, acquired at about noon local solar time, are at the top. Below them is a close-up view from the microscopic imager.

    At upper left, a false-color view emphasizes differences among materials in rocks and soil. It combines images taken through the panoramic camera's 753-nanometer, 535-nanometer and 432-nanometer filters. At upper right is an approximately true-color rendering made with the panoramic camera's 600-nanometer, 535-nanometer and 480-nanometer filters. The microscopic-imager frame covers the area outlined by the white boxes in the panoramic-camera views, a rectangle 3 centimeters (1.2 inches) across.

    As Opportunity traverses to the south, it is analyzing soil and rocks along the way for differences from those seen earlier. At this site, the soil contains abundant small spherical fragments, thought to be hematite-rich concretions, plus finer-grained basaltic sand. Most of the spherical fragments seen in the microscopic image are smaller than those first seen at the rover's landing site in 'Eagle Crater,' some five kilometers (3.1 miles) to the north. However, a few larger spherical fragments and other rock fragments can also be seen in the panoramic-camera images.

  9. When did movement begin on the Furnace Creek fault zone

    SciTech Connect

    Reheis, M. (Geological Survey, Denver, CO (United States))

    1993-04-01

    About 50 km of post-Jurassic right-lateral slip has occurred on the northern part of the Furnace Creek fault zone (FCFZ). The sedimentology, stratigraphy, and structure of Tertiary rocks suggest that movement on the fault began no earlier than 12--8 Ma and possibly as late as 5--4 Ma. Large remnants of erosion surfaces occur on both sides of the FCFZ in the southern White Mountains and Fish Lake Valley and are buried by rhyolite and basalt, mostly 12--10 Ma; the ash flows and welded tuffs were likely erupted from sources at least 40 km to the east. Thus, the area probably had gentle topography, suggesting a lengthy period of pre-late Miocene tectonic stability. On the west side of the FCFZ, Cambrian sedimentary rocks are buried by a fanglomerate with an [sup [minus

  10. Sunset over Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  11. Sunset in Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  12. Manzanita in Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  13. Yucca in Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  14. Bridalveil Creek

    USGS Multimedia Gallery

    In this image, Bridalveil Creek is seen flowing just beneath the base of Bridalveil Fall. The waterfall is 617 ft (188 m) in height and is one of the most well-known of Yosemite National Park's waterfalls....

  15. Hell Creek

    USGS Multimedia Gallery

    The Hell Creek and underlying Fox Hills Formations are present at the land surface along the margins of the Williston Basin, but otherwise are the deepest bedrock aquifers that are commonly used in the basin....

  16. Rocks, Rocks, Rocks

    NSDL National Science Digital Library

    2014-09-18

    Students test rocks to identify their physical properties (such as luster, hardness, color, etc.) and classify them as igneous, metamorphic or sedimentary. They complete a worksheet table to record all of the rock properties, and then answer worksheet questions to deepen their understanding of rock properties and relate them to the cavern design problem.

  17. Rocks, Rocks, Rocks

    NSDL National Science Digital Library

    Adventure Engineering,

    Continuing the Asteroid Impact challenge, student teams test rocks to identify their physical properties (such as luster, hardness, color, etc.) and classify them as igneous, metamorphic or sedimentary. They complete a worksheet table to record all of the rock properties, and then answer worksheet questions to deepen their understanding of rock properties and relate them to the cavern design problem.

  18. Science Rocks!

    ERIC Educational Resources Information Center

    Prestwich, Dorothy; Sumrall, Joseph; Chessin, Debby A.

    2010-01-01

    It all began one Monday morning. Raymond could not wait to come to large group. In his hand, he held a chunk of white granite he had found. "Look at my beautiful rock!" he cried. The rock was passed around and examined by each student. "I wonder how rocks are made?" wondered one student. "Where do they come from?" asked another. At this moment, a…

  19. Spring Database for the Basin and Range Carbonate-Rock Aquifer System, White Pine County, Nevada, and Adjacent Areas in Nevada and Utah

    USGS Publications Warehouse

    Pavelko, Michael T.

    2007-01-01

    A database containing nearly 3,400 springs was developed for the Basin and Range carbonate-rock aquifer system study area in White Pine County, Nevada, and adjacent areas in Nevada and Utah. The spring database provides a foundation for field verification of springs in the study area. Attributes in the database include location, geographic and general geologic settings, and available discharge and temperature data for each spring.

  20. Sailing to White Boat

    NASA Technical Reports Server (NTRS)

    2004-01-01

    This is a composite red-green-blue image of the rock called White Boat. It is the first rock target that Spirit drove to after finishing a series of investigations on the rock Adirondack. White Boat stood out to scientists due to its light color and more tabular shape compared to the dark, rounded rocks that surround it.

  1. Geologic Map of the Upper Wolf Island Creek Watershed, Reidsville Area, Rockingham County, North Carolina

    USGS Publications Warehouse

    Horton, J. Wright, Jr.; Geddes, Donald J., Jr.

    2006-01-01

    This geologic map provides a foundation for hydrogeologic investigations in the Reidsville area of Rockingham County, north-central North Carolina. The 16-mi2 area within the Southeast Eden and Reidsville 7.5-min quadrangles includes the watershed of Wolf Island Creek and its tributary, Carroll Creek, upstream of their confluence. Layered metamorphic rocks in this area of the Milton terrane, here informally named the Chinqua-Penn metamorphic suite, include a heterogeneous mica gneiss and schist unit that contains interlayers and lenses of white-mica schist, felsic gneiss, amphibolite, and ultramafic rock; a felsic gneiss that contains interlayers of amphibolite, white-mica schist, and minor ultramafic lenses; and a migmatitic biotite gneiss. Crushed stone is produced from an active quarry in the felsic gneiss. Igneous intrusive rocks include a mafic-ultramafic assemblage that may have originated as mafic intrusive bodies containing ultramafic cumulates, a foliated two-mica granite informally named the granite of Reidsville, and unmetamorphosed Jurassic diabase dikes. The newly recognized Carroll Creek shear zone strikes roughly east-west and separates heterogeneous mica gneiss and schist to the north from structurally overlying felsic gneiss to the south. Regional amphibolite-facies metamorphism accompanied polyphase ductile deformation in the metamorphic rocks. Two phases of isoclinal to tight folding and related penetrative deformation, described as D1 and D2, were followed by phases of high-strain mylonitic deformation in shear zones and late gentle to open folding. Later brittle deformation produced minor faults, steep joints, foliation-parallel parting, and sheeting joints. The metamorphic and igneous rocks are mantled by saprolite and residual soil derived from weathering of the underlying bedrock, and unconsolidated Quaternary alluvium occupies the flood plains of Wolf Island Creek and its tributaries. The geologic map delineates lithologic and structural features that may act as barriers or conduits for ground-water flow. It provides a hydrogeologic framework for the upper Wolf Island Creek drainage basin, including coreholes and ground-water monitoring wells along two transects. Collaborative hydrogeologic investigations by the North Carolina Department of Environment and Natural Resources and the U.S. Geological Survey are in progress to increase understanding of the influence of geological features on ground-water quality, availability, and transport in an area representative of large areas in the west-central Piedmont.

  2. Geology of the Upper Schep Creek area, Mason County, Texas 

    E-print Network

    Marshall, Hollis Dale

    1959-01-01

    slliptioal in shape, ?hose dinensions are approninstely 80 niles ~ ast~t and 50 silas ncrth-south. The basin floor consists of a very rugged hilly terrain forned by outcrops of Precanbrian and Psleosoic rocks, ?harass its rin is ccnposed of rocks... Sobep Creek Area and Fora Part of the Rtn of the Topographio Basin 33 V. Faults Exposed Along the West Branoh of Paatber Creek . . 43 Vi. Typical Fault Pattern of tbe Upper Sobep Creek Area. . . 45 O&EOLOOY OF TRE UPPER SCHEP CREEK AREA& HASON...

  3. Rock Creek methane from Multiple-Coal-Seams Completion Project. Annual report, January-December 1990. 1. 1. 4 Coalbed-Methane Multiple-Coal-Seam project 305

    SciTech Connect

    Dobscha, F.X.; Durden, A.H.; Robb, J.C.; Saulsberry, J.L.; Spafford, S.D.

    1991-10-01

    The Multiple Coal Seams Completion Project is a joint venture developing drilling, completion, testing, stimulation, and production procedures for economic production of methane from multiple coal seams. During the report period, extensive well testing was conducted. Slug tests and injection tests were performed on Wells P6 and P7 in addition to slug tests on several offsite wells. Wells P6 and P7 were stimulated in the Black Creek Group with cross-linked gel treatments. Production peaked at 175 MCFD and 46 MCFD for Wells P6 and P7, respectively. Pressure has been reduced so much in the project area that production was declining for all of the wells through the later half of 1990. Corehole C4 was completed in June 1990. Desorption tests from cores show that, in an area 500 to 600 feet from production wells, up to 80% of the original methane resource has been recovered. Additional Wells P3A (Pratt), M6 (Mary Lee and Black Creek monitor well), and P8 (originally M8) were drilled and cased. Permeability and compressibility testing will be conducted on these wells in 1991 and Well P3A will be stimulated in the Pratt Coal Group with unconventional treatments. Water, gas analyses, rate, and pressure data for 10 wells and reservoir for 18 monitor wells was recorded and distributed to various project support contractors for analysis.

  4. Water quality in the Anacostia River, Maryland and Rock Creek, Washington, D.C.: Continuous and discrete monitoring with simulations to estimate concentrations and yields of nutrients, suspended sediment, and bacteria

    USGS Publications Warehouse

    Miller, Cherie V.; Chanat, Jeffrey G.; Bell, Joseph M.

    2013-01-01

    Concentrations and loading estimates for nutrients, suspended sediment, and E. coli bacteria were summarized for three water-quality monitoring stations on the Anacostia River in Maryland and one station on Rock Creek in Washington, D.C. Both streams are tributaries to the Potomac River in the Washington, D.C. metropolitan area and contribute to the Chesapeake Bay estuary. Two stations on the Anacostia River, Northeast Branch at Riverdale, Maryland and Northwest Branch near Hyattsville, Maryland, have been monitored for water quality during the study period from 2003 to 2011 and are located near the shift from nontidal to tidal conditions near Bladensburg, Maryland. A station on Paint Branch is nested above the station on the Northeast Branch Anacostia River, and has slightly less developed land cover than the Northeast and Northwest Branch stations. The Rock Creek station is located in Rock Creek Park, but the land cover in the watershed surrounding the park is urbanized. Stepwise log-linear regression models were developed to estimate the concentrations of suspended sediment, total nitrogen, total phosphorus, and E. coli bacteria from continuous field monitors. Turbidity was the strongest predictor variable for all water-quality parameters. For bacteria, water temperature improved the models enough to be included as a second predictor variable due to the strong dependence of stream metabolism on temperature. Coefficients of determination (R2) for the models were highest for log concentrations of suspended sediment (0.9) and total phosphorus (0.8 to 0.9), followed by E. coli bacteria (0.75 to 0.8), and total nitrogen (0.6). Water-quality data provided baselines for conditions prior to accelerated implementation of multiple stormwater controls in the watersheds. Counties are currently in the process of enhancing stormwater controls in both watersheds. Annual yields were estimated for suspended sediment, total nitrogen, total phosphorus, and E. coli bacteria using the U.S. Geological Survey model LOADEST with hourly time steps of turbidity, flow, and time. Yields of all four parameters were within ranges found in other urbanized watersheds in Chesapeake Bay. Annual yields for all four watersheds over the period of study were estimated for suspended sediment (65,500 – 166,000 kilograms per year per square kilometer; kg/yr/km2), total nitrogen (465 - 911 kg/yr/km2), total phosphorus (36 - 113 kg/yr/km2), and E. coli bacteria (6.0 – 38 x 1012 colony forming units/yr/km2). The length of record was not sufficient to determine trends for any of the water-quality parameters; within confidence intervals of the models, results were similar to loads determined by previous studies for the Northeast and Northwest Branch stations of the Anacostia River.

  5. Archean rock homologs in the Kola superdeep borehole section in the northern part of the White Sea mobile belt, Voche-Lambina test site

    NASA Astrophysics Data System (ADS)

    Morozova, L. N.; Mitrofanov, F. P.; Bayanova, T. B.; Vetrin, V. R.; Serov, P. A.

    2012-01-01

    The Archean Complex homologs of the Kola superdeep borehole (SG-3) were identified in the northern part of the White Sea mobile belt. Tonalite-trondhjemite-granodiorite gneisses of the Voche-Lambina test site and metavolcanic dacite-rhyodacite rocks of the borehole SG-3 were formed at the stages of 2.97-2.82, ˜2.81, and 2.78-2.79 Ga. The Sm-Nd model ages of the studied rocks do not exceed 3.1 Ga, and their positive ?Nd(t) values vary from +0.5 to +3.34. They are characterized by Mg# = 0.20-0.44, similar concentrations (HFSE) of Zr, Nb, Y, and also Rb, Cr, and Ni, and sharply differentiated spectra of the REE distribution (Ce/Sm = 3.2-5.8; Gd/Yb = 2.6-7.1). Primary melts were formed in balance with garnetamphibole restite under P ? 15-16 kbar.

  6. Barrel Cactus in Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  7. Sunset Panorama in Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  8. Loblolly Pines in Pine Creek Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  9. Geologic map of the Skull Creek Quadrangle, Moffat County Colorado

    USGS Publications Warehouse

    Van Loenen, R. E.; Selner, Gary; Bryant, W.A.

    1999-01-01

    The Skull Creek quadrangle is in northwestern Colorado a few miles north of Rangely. The prominent structural feature of the Skull Creek quadrangle is the Skull Creek monocline. Pennsylvanian rocks are exposed along the axis of the monocline while hogbacks along its southern flank expose rocks that are from Permian to Upper Cretaceous in age. The Wolf Creek monocline and the Wolf Creek thrust fault, which dissects the monocline, are salient structural features in the northern part of the quadrangle. Little or no mineral potential exists within the quadrangle. A geologic map of the Lazy Y Point quadrangle, which is adjacent to the Skull Creek quadrangle on the west, is also available (Geologic Investigations Series I-2646). This companian map shows similar geologic features, including the western half of the Skull Creek monocline. The geology of this quadrangle was mapped because of its proximity to Dinosaur National Monument. It is adjacent to quadrangles previously mapped to display the geology of this very scenic and popular National Monument. The Skull Creek quadrangle includes parts of the Skull Creek Wilderness Study Area, which was assessed for its mineral resource potential.

  10. Mercury contamination in East Fork Poplar Creek and Bear Creek

    SciTech Connect

    Van Winkle, W.; Counts, R.W.; Dorsey, J.G.; Elwood, J.W.; Lowe, V.W. Jr.; McElhaney, R.; Schlotzhauer, S.D.; Taylor, F.G. Jr.; Turner, R.R.

    1984-02-01

    A one-month study was performed to determine the concentration of mercury in sediment, fish, moss, and pasture grass in the East Fork Poplar Creek (EFPC) and Bear Creek drainages and to determine whether mercury is still being released from the Y-12 Plant. Total mercury concentration in a sediment core from New Hope Pond was 100 ..mu..g/g dry wt at the surface and up to 300 ..mu..g/g dry wt in subsurface sediments, relative to background concentrations of less than 0.3 ..mu..g/g dry wt. There has been an apparent decrease since 1973 in mercury concentration of sediment entering New Hope Pond. Total mercury concentration in muscle tissue of bluegill from EFPC was positively correlated with body weight, as expected. Total mercury concentration averaged 3.5 and 0.2 ..mu..g/g fresh wt for dead and live foliage in pasture grass, respectively, on the flood plain of EFPC. Results for Bear Creek indicate that this drainage is considerably less contaminated with mercury than East Fork Poplar Creek. The concentration in the sediment was 13 ..mu..g/g dry wt near the settling basins at the west end of the Y-12 Plant area, but decreased to background concentrations before the confluence of Bear Creek with EFPC. Total mercury concentration in fish, except for one rock bass, did not exceed the FDA action level. Recommendations are made (1) to limit the quantity of mercury released from the Y-12 Plant area into EFPC, (2) to consider notifying the responsible state agencies and fishermen concerning mercury concentrations found in fish in EFPC, and (3) to measure mercury concentration in hair from cattle grazing on pasture grasses along EFPC. Recommendations concerning further monitoring are also made. 15 references, 3 figures, 8 tables.

  11. St. Vrain Creek

    USGS Multimedia Gallery

    St. Vrain Creek below Boulder Creek at Hwy 119 near Longmont, CO; Bob Brandle, Cory Stephens, Matt Nicotra, and Kevin Scofield measure discharge and install temporary streamgage replacing nearby damaged streamgage....

  12. Hydrological and water quality characteristics of three rock glaciers: Blanca Massif, Colorado, USA 

    E-print Network

    DeMorett, Joseph Lawrence

    1989-01-01

    Creek Rock Glacier (Dutch Creek). 6. Stzeam issuing from the base of the California Rock Glacier. . . . . . , 7 The California Rock Glacier 8. Longitudinal profile of the California Rock Glacier study site. . . . . . 9. Cmss sectional profile... literature. A brief review of the rock glacier knowledge base is presented first, followed by an in-depth discussion of specific rock glacier studies pertinent to the thesis objectives. The physical setting in terms of geographic location, access, natural...

  13. Restoring Fossil Creek

    ERIC Educational Resources Information Center

    Flaccus, Kathleen; Vlieg, Julie; Marks, Jane C.; LeRoy, Carri J.

    2004-01-01

    Fossil Creek had been dammed for the past 90 years, and plans were underway to restore the stream. The creek runs through Central Arizona and flows from the high plateaus to the desert, cutting through the same formations that form the Grand Canyon. This article discusses the Fossil Creek monitoring project. In this project, students and teachers…

  14. Water Resources of the Basin and Range Carbonate-Rock Aquifer System, White Pine County, Nevada, and Adjacent Areas in Nevada and Utah

    USGS Publications Warehouse

    Welch, Alan H., (Edited By); Bright, Daniel J.; Knochenmus, Lari A.

    2008-01-01

    INTRODUCTION This report summarizes results of a water-resources study for White Pine County, Nevada, and adjacent areas in east-central Nevada and western Utah. The Basin and Range carbonate-rock aquifer system (BARCAS) study was initiated in December 2004 through Federal legislation (Section 301(e) of the Lincoln County Conservation, Recreation, and Development Act of 2004; PL108-424) directing the Secretary of the Interior to complete a water-resources study through the U.S. Geological Survey, Desert Research Institute, and State of Utah. The study was designed as a regional water-resource assessment, with particular emphasis on summarizing the hydrogeologic framework and hydrologic processes that influence ground-water resources. The study area includes 13 hydrographic areas that cover most of White Pine County; in this report however, results for the northern and central parts of Little Smoky Valley were combined and presented as one hydrographic area. Hydrographic areas are the basic geographic units used by the State of Nevada and Utah and local agencies for water-resource planning and management, and are commonly defined on the basis of surface-water drainage areas. Hydrographic areas were further divided into subbasins that are separated by areas where bedrock is at or near the land surface. Subbasins are the subdivisions used in this study for estimating recharge, discharge, and water budget. Hydrographic areas are the subdivision used for reporting summed and tabulated subbasin estimates.

  15. Oxygen Isotopes and the Cooling History of the Mount Barcroft Area, Central White Mountains, Easternmost California

    NASA Astrophysics Data System (ADS)

    Ernst, W. G.; Rumble, D.

    2001-12-01

    The White-Inyo Range + Owens Valley marks the western limit of the Basin and Range province, directly east of the Sierra Nevada. At Mount Barcroft, mid-Mesozoic, alkaline, bimodal White Mountain Peak metavolcanic + metaclastic rocks on the N are separated from Lower Cambrian siliciclastic + carbonate metasedimentary strata on the S by the NE-trending Middle Jurassic Barcroft mafic granodioritic pluton. It consists of mineralogically/chemically intergradational gabbro/diorite, granodiorite, metadiorite, and alaskite. Eastward, the section is intruded by the Late Cretaceous, ternary-minimum McAfee Creek Granite. Ignoring altered dikes, bulk-rock analyses of plutonic rocks indicate that metaluminous, I-type rocks of the Barcroft comagmatic suite possess an av(12) d18O value of 7.5. Slightly peraluminous, apparently S-type granitic rocks sensu stricto of the McAfee Creek series have an av(8) d18O value of 8.6. Evidence is lacking for large-scale bulk-rock interaction with near-surface waters, suggesting intermediate crustal depths of intrusion and cooling for these plutons. Coexisting Barcroft minerals exhibit consistent oxygen isotopic partitioning from high to low d18O in the sequence quartz > plagioclase > K-feldspar >> amphibole = biotite. Wall-rock quartz and biotite are richer in 18O than analogous phases in the plutonic rocks, and show slightly greater fractionations than igneous counterparts. Along its borders, late-stage exchange with heated aqueous fluids, derived from recrystallized wall rocks due to emplacement of the Middle Jurassic magma, increased 18O/16O ratios of dikes, and some Barcroft igneous plagioclase and subsolidus tremolite-actinolite. Oxygen isotope geothermometry for Barcroft quartz-amphibole and quartz-biotite pairs yields broadly similar temperatures; the combined average of 13 pairs is 519oC. A single quartz-biotite pair analyzed from a Lower Cambrian quartzite within the inner metamorphic aureole of the Barcroft pluton yields a temperature of 511oC, in agreement with values based on wall-rock metamorphic parageneses. Barcroft quartz, feldspars, biotite, and clinoamphiboles were subjected to exchange with deuteric fluid, and re-equilibrated under subsolidus conditions. Quartz-plagioclase pairs from two Barcroft granodiorites possess similar temperatures of 519 and 515oC, so also re-equilibrated at subsolidus temperatures. Areal distributions for quartz-plagioclase, quartz-clinoamphibole, and quartz-biotite pairs reveal that annealing temperatures are lowest in axial portions of the Barcroft granodioritic pluton. Late Cretaceous emplacement of the McAfee Creek Granite had little effect on d18O values of Barcroft minerals and bulk rocks.

  16. SPECIAL MINING MANAGEMENT ZONE - CLEAR CREEK, IDAHO.

    USGS Publications Warehouse

    Lund, Karen; Esparza, Leon E.

    1984-01-01

    On the basis of mineral-resource surveys, a substantiated resource potential for sediment-hosted cobalt-copper-gold-silver deposits has been identified in the Elkhorn and upper Garden Creek areas of the Special Mining Management Zone - Clear Creek, Idaho. Areas of favorable host rock, but with less strong evidence of mineralization, were classified as having probable resource potential for the same kind of deposit. A probable resource potential for porphyry-type copper-molybdenum deposits is assigned to areas along Clear Creek and upper Squaw Gulch based on the presence of extensive stockwork fracturing and alteration of the nonporphyritic granite, introduced disseminated magnetite, and the close proximity of known Tertiary plutons. The nature of the geologic terrain makes the occurrence of organic fuels on geothermal resources extremely unlikely.

  17. 5. Laurel Creek Road, revetment wall and creek. Great ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Laurel Creek Road, revetment wall and creek. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

  18. Cache Creek ocean: Closure or enclosure?

    NASA Astrophysics Data System (ADS)

    Nelson, Joanne; Mihalynuk, Mitch

    1993-02-01

    Exotic Tethyan faunas within the Cache Creek terrane contrast markedly with faunas and lithologic associations in the adjacent Quesnel and Stikine terranes. In northern British Columbia and southeast Yukon, all three terranes are enveloped in the north by pericontinental rocks of the Yukon-Tanana terrane, a geometry that imposes severe constraints on terrane assembly models for the northern Canadian Cordillera. Our solution to the problem invokes a northern join between the Stikinia and Quesnellia arcs through the Yukon-Tanana terrane, forming an orocline that encloses the Cache Creek terrane. This model involves (1) collision of a linear oceanic plateau at the cusp between Quesnellia and Stikinia, (2) anticlockwise rotation of Stikinia about an axis in the Yukon-Tanana terrane, (3) simultaneous enclosure of the Cache Creek ocean, and (4) emplacement of Quesnellia onto the margin of ancestral North America and the Cache Creek terrane onto Stikinia during final closure of the orocline. Early Mesozoic Paleomagnetic declinations in Stikinia are permissive of the large anticlockwise rotations predicted by the model. Similar large-scale rotations and ocean-basin enclosure are common features in the southwest Pacific. This model accounts for Paleozoic and younger linkages between Yukon-Tanana and both northern Stikinia and Quesnellia, the striking similarity between Triassic-Jurassic arcs east and west of the Cache Creek terrane, and the profound early Mesozoic deformational event in the Yukon-Tanana terrane.

  19. Guardians of Tradition and Handmaidens to Change: Women's Roles in Creek Economic and Social Life during the Eighteenth Century.

    ERIC Educational Resources Information Center

    Braund, Kathryn E. Holland

    1990-01-01

    Argues that, during the eighteenth century, Creek women were central elements in both cultural preservation and adaptation to white ways. Discusses the deerskin trade, matrilineal customs, male and female roles, sexuality, marriage, intermarriage between Creek women and white traders, and the role of mixed bloods as cultural intermediaries. (SV)

  20. In-situ Ar-Ar white mica ages reveal differences in mica crystallization behaviour in quartz-rich and calcite-rich rocks of the same shear zone

    NASA Astrophysics Data System (ADS)

    Cossette, Élise; Schneider, David; Warren, Clare; Grasemann, Bernhard

    2013-04-01

    Conventional Ar-Ar dating of tectonites can result in equivocal ages due to mixed mineral populations, excess 40Ar (decoupled from its parent 40K), or partial resetting of the K-Ar systematics. In-situ Ar-Ar dating was performed on white micas from footwall marbles and schists of the Western Cycladic Detachment System (WCDS) of the Aegean. These rocks are part of the Cycladic Blueschist Unit, which experienced HP conditions during the Eocene and strong extension during the Miocene. The rocks contain undeformed, kinked, and neocrystallized micas with the mica phases recording higher strain (elongated grains and mica-fish structures) in quartz-dominated rocks compared to the calcite-dominated assemblages. In both quartzitic and calcitic rocks, deformed white micas are chemically zoned. Two chemical populations were identified: (1) a high component of Al-celadonite in undeformed portions of grains that likely crystallized during high pressure metamorphism; (2) enrichment in muscovite in deformed portions of grains as a result of Tschermak substitution that took place during deformation-induced neocrystallization under shallow crustal conditions. Neocrystallization occurs preferentially in zones of localized deformation and in zones of enhanced fluid availability. The latter is supported by stable isotope (O, C, H) analyses of calcite, dolomite and white micas that suggest a moderate fluid-rock interaction resulting in a coupled depletion of ?18O vs ?13C and ?18O vs ?D. Recrystallized quartz exhibits planar indentation structures, also consistent with fluid-assisted deformation. Completely neocrystallized grains, in quartzitic rocks from Kea Island at the center of the WCDS yield Ar-Ar deformation ages of c. 18-21 Ma, which are interpreted as dating the timing of ductile extension along the detachment system. Undeformed (unkinked, prismatic) portions of white micas in calcitic rocks from Serifos Island at the southern end of the WCDS yield Ar-Ar ages of c. 40-45 Ma, whereas deformed (kinked or strained) portions of the same grains yield younger ages of c. 31-36 Ma. Calcitic rocks are intrinsically less permeable than quartzitic rocks, thus are less affected by fluid-induced recrystallization. Moreover, in calcite-muscovite aggregates, strain is accommodated in calcite (by dislocation creep) whereas in quartz-muscovite aggregates, strain is accommodated in mica (as mica-fish structures). Hence, ductily deformed and completely neocrystallized micas occur more often in quartzitic rocks, whereas calcitic rocks contain micas that are only partially neocrystallized due to a lack of deformation and fluid infiltration. Consequently, consistent with our empirical results, the minimum age of ductile deformation is more likely to be preserved in quartzitic rocks, such as the c. 18-21 Ma obtained on Kea. Similarly, inherited or partially reset ages are likely to be found in calcitic rocks, such as the c. 31-36 Ma from Serifos.

  1. Shell Creek Summers

    ERIC Educational Resources Information Center

    Seier, Mark; Goedeken, Suzy

    2005-01-01

    In 2002 Shell Creek Watershed Improvement Group turned to the Newman Grove Public Schools' science department to help educate the public on water quality in the watershed and to establish a monitoring system that would be used to improve surface and groundwater quality in the creek's watershed. Nebraska Department of Environmental Quality provided…

  2. Stratigraphic and structural relations of Lower Triassic rocks within the frontal fold-and-thrust zone of southwestern Montana

    Microsoft Academic Search

    R. K. Paull; R. A. Paull

    1991-01-01

    New sections of Lower Triassic rocks were measured within the frontal fold-and-thrust zone of southwestern Montana at Garfield Canyon, Horse Prairie Creek, Kennison Spring, and Birch Creek to clarify stratigraphic and structural relations. Triassic rocks disconformably overlie Upper Permian units and unconformably underlie younger rocks. From oldest to youngest, they include the Dinwoody, Woodside, and Thaynes formations. The Dinwoody consists

  3. SOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER

    E-print Network

    Ryan, Joe

    the Standard Mine and the naturally occurring iron fen and gossan in the Coal Creek watershed in Gunnison, and zinc to Coal Creek. Elk Creek (containing Standard Mine drainage) was identified as a major sourceSOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER

  4. Mill Creek Summit Lovejoy Buttes

    E-print Network

    Mill Creek Summit Lovejoy Buttes Piute Butte Alpine Butte near-Black Butte Lovejoy Buttes Mill Creek Summit Piute Butte Alpine Butte near-Black Butte Lovejoy Buttes Mill Creek Summit Piute Butte Llano Figure 6. Sample Seismogram from M3 Hector Mine Aftershock Mill Creek Summit Lovejoy Buttes Piute

  5. Sunset over Red Rock Canyon

    USGS Multimedia Gallery

    Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Rock Canyon is a National Conservation Area managed by the Bureau of Land Management, located just outside of Las Vegas, Nevada. It is part of...

  6. Irrigated Acreage Within the Basin and Range Carbonate-Rock Aquifer System, White Pine County, Nevada, and Adjacent Areas in Nevada and Utah

    USGS Publications Warehouse

    Welborn, Toby L.; Moreo, Michael T.

    2007-01-01

    Accurate delineations of irrigated acreage are needed for the development of water-use estimates and in determining water-budget calculations for the Basin and Range carbonate-rock aquifer system (BARCAS) study. Irrigated acreage is estimated routinely for only a few basins in the study area. Satellite imagery from the Landsat Thematic Mapper and Enhanced Thematic Mapper platforms were used to delineate irrigated acreage on a field-by-field basis for the entire study area. Six hundred and forty-three fields were delineated. The water source, irrigation system, crop type, and field activity for 2005 were identified and verified through field reconnaissance. These data were integrated in a geodatabase and analyzed to develop estimates of irrigated acreage for the 2000, 2002, and 2005 growing seasons by hydrographic area and subbasin. Estimated average annual potential evapotranspiration and average annual precipitation also were estimated for each field.The geodatabase was analyzed to determine the spatial distribution of field locations, the total amount of irrigated acreage by potential irrigation water source, by irrigation system, and by crop type. Irrigated acreage in 2005 totaled nearly 32,000 acres ranging from less than 200 acres in Butte, Cave, Jakes, Long, and Tippett Valleys to 9,300 acres in Snake Valley. Irrigated acreage increased about 20 percent between 2000 and 2005 and increased the most in Snake and White River Valleys. Ground-water supplies as much as 80 percent of irrigation water during dry years. Almost 90 percent of the irrigated acreage was planted with alfalfa.

  7. LOST COVE AND HARPER CREEK ROADLESS AREAS, NORTH CAROLINA.

    USGS Publications Warehouse

    Griffitts, W.R.; Crandall, T.M.

    1984-01-01

    An investigation indicated that a part of the Lost Cove and Harper Creek Roadless Areas, North Carolina has a probable mineral-resource potential for uranium, niobium, and beryllium. The study areas lie within the Blue Ridge physiographic province and are predominantly underlain by Precambrian plutonic and metasedimentary rocks of low metamorphic grade. The uranium occurs in vein-type deposits and in supergene-enriched foliated rocks. The geologic setting precludes the presence of fossil fuel resources.

  8. Stratigraphy and structure of the Williams Creek area, Hinsdale, Mineral, and Archuleta counties, Colorado

    E-print Network

    Moore, George Edwards

    1964-01-01

    rocks and the granite are unconformably overlain by the Entrada Sandstone of Late Jurassic age. MESOZOIC ROCKS The Mesozoic units cropping out in the Williams Creek area are widespread in the Four Corners region. In Table 2, the stratigraphic... Vegetation Land Use . PHYSIOGRAPHY Topography Drainage . STRATIGRAPHY General Statement . Precambrian Rocks Uncompahgre Formation Eolus Granite Mesozoic Rocks Jurassic System Entrada Formation. Wanakah Formation Pony Express Member Middle...

  9. BUCKS LAKE AND CHIPS CREEK ROADLESS AREAS, CALIFORNIA.

    USGS Publications Warehouse

    Sorensen, Martin L.; Linne, J. Mitchell

    1984-01-01

    The results of a mineral-resource assessment of the Bucks Lake and Chips Creek Roadless Areas, California indicate several areas with mineral-resource potential. The presence or absence of these potentially auriferous deposits can best be determined by drilling through the relatively thin cover of volcanic rocks.

  10. Hot Springs Creek

    USGS Multimedia Gallery

    USGS scientist Jennifer Lewicki measures the discharge along a tributary to Hot Springs Creek, Akutan Island, Alaska. Steam (upper left) rises from 3 high-temperature springs that discharge into the tributary....

  11. The Silver Creek Preserve

    USGS Multimedia Gallery

    Before The Nature Conservancy established the Silver Creek Preserve, the watershed had been degraded by years of livestock grazing and overfishing. Preserve managers have been concerned about sedimentation, increasing stream temperatures, and invasive species. To measure the effectiveness of their ...

  12. Regional significance of recurrent faulting and intracanyon volcanism at Oak Creek Canyon, southern Colorado Palteau, Arizona

    SciTech Connect

    Holm, R.F. (Northern Arizona Univ., Flagstaff (USA)); Cloud, R.A. (Exxon Company, International, Houston, TX (USA))

    1990-10-01

    Measured sections of late Miocene basalt lava flows, Tertiary gravel, and Paleozoic strata are the basis for stratigraphic reconstructions that provide evidence for pre- and post-volcanic movements on the Oak Creek fault, and for the existence of a prevolcanic ancestral Oak Creek Canyon, Arizona. Recurrent faulting, recording Laramide compression and Basin and Range extension, suggests probable control by an ancestral Oak Creek fault that would belong to a regional system of basement faults hat have controlled Colorado Plateau structures in Phanerozoic rocks. Locally derived Tertiary gravel and overlying lavas filled a canyon eroded in Paleozoic strata along the Oak Creek fault. Southward flow of ancestral Oak Creek, indicated y the lithology and geomorphic position of the gravel, valley reconstruction, and lava vents to the north, northeast, or east, requires that the regional drainage reversal on the southern Colorado Plateau occurred before late Miocene time in the Oak Creek area.

  13. Occurrence of uranium-bearing coal, carbonaceous shale, and carbonaceous limestone in the Fall Creek area, Bonneville County, Idaho

    USGS Publications Warehouse

    Vine, James D.; Moore, George W.

    1952-01-01

    Uraniferous coal, carbonaceous shale, and carbonaceous limestone occur in the Bear River formation of Upper Crestaceous age at the Fall Creek prospect, in the Fall Creek area, Bonneville County, IDaho. The uranium compounds are believed to have been derived from mildly radioactive silicic volcanic rocks of the Tertiary age that rest unconformably on all older rocks and once overlay the Bear River formation and its coal. Meteoric water, percolating downward through the silicic volcanic rocks and into the older rocks along joints and faults, is believed to have brought the uranium compounds into contact with the coal and carbonaceous rocks in which the uranium was absorbed.

  14. Early riparian wells along Oil Creek, Northwest Pennsylvania

    SciTech Connect

    Pees, S.T. [Samuel T. Pees and Associates, Meadville, PA (United States)

    1995-09-01

    The early oil booms beginning in the 1860`s in Northwest Pennsylvania saw a multitude of derricks crowding the narrow flats of Oil Creek between Titusville and Oil City. Oil Creek is a shallow watercourse with gravel bars and islands. At low water one can wade it without wetting the kneecaps. In wet seasons the stream can quickly become a torrent, flooding its banks. In winter it can pile high with jagged ice blocks creating crystal mountains, especially at its mouth where it empties into the Allegheny River at Oil City. Well spacing in the bottoms finally became so close that some oil men headed for the gravel bars an small islands. Others drilled directly in the creek. The objectives were the Upper Devonian Venango Group sandstones, particularly the Third sand, at depths of only 450-550 feet (137-168 m). Early initial production rates of the best wells were 1000, 3000, even 4000 barrels per day. This was the incentive. Piles of rocks and logs were made for some wells on floodable land along Oil Creek. The jacks and well heads stood high above the flats on these artificial mounds. Protective V walls of wood or concrete were made for creek and bank wells. The V pointed upstream and the wooden separator tank was nuzzled inside it. Another approach was a pier built out into the creek to support drilling. Some of these silent reminders of earlier days are still out there.

  15. Water quality and chemistry of an alpine stream: a case study of Sneffels Creek, Yankee Boy Basin, Colorado 

    E-print Network

    Heggie, Tracey Michelle

    2002-01-01

    debris from Atlas Mine, . 4 Looking down from Mount Sncffels at the head of Sneffels Creek. . . . . . . . . . . 29 5 Glacial features: horns, aretes, rock glacier, till, tarns, cols and cirques. . . . . 31 6 Columnar jointing. 7 Mean monthly...

  16. Rock Climbing

    NSDL National Science Digital Library

    2006-01-01

    Join Jesse and Gordon on their rock climbing adventures. In this video you will learn about metamorphic, sedimentary, and igneous rocks. Learn what types of rocks are best for climbing and how to determine each rock type.

  17. Rad Rocks

    NSDL National Science Digital Library

    2010-04-26

    Why do we have rocks? How are rocks formed? Why do we have rock cycles? There are all differnt kinds of rocks. What parts make up rocks? Can you sort rocks based on color, hardness, texture, layering, and particle size? How do the things rocks are made of determine how people use them? Organize rocks by color, weight, shape, and sizes. Click here to find out the basics about ...

  18. 75 FR 39926 - Deer Creek Station Energy Facility Project (DOE/EIS-0415)

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-13

    ...Deer Creek, and the water would be transmitted...site by a 1.25-mile water pipeline. White Site...generation facility footprint, White Site 2 would...from the site. Cooling water would be provided by...construction-related emissions and transportation-related...

  19. Death in Indiana: "The Massacre at Fall Creek" by Jessamyn West.

    ERIC Educational Resources Information Center

    Rout, Kathleen

    1985-01-01

    Interpreted is the novel, "The Massacre at Fall Creek," that dramatizes an event that occurred in Indiana in 1824 in which White men killed unarmed Seneca Indians. The Whites were brought to trial, convicted, and hanged. The novel demonstrates the moral ambiguity that often characterizes responses toward crime and punishment. (RM)

  20. Boulder Creek Study

    NSDL National Science Digital Library

    Deirdre Bingaman

    2010-02-01

    Boulder Creek runs literally in the backyard of Donnelly Elementary School and happens to be on the EPA list of impaired water bodies. Therefore, a unique opportunity for problem solving opened the door to an exciting chance for students to become scienti

  1. The Paint Creek Project.

    ERIC Educational Resources Information Center

    Northrop, David; Vonck, Beth

    1998-01-01

    Describes a summer program project designed and conducted by a mixed-age group of elementary children. Students collected data to determine whether a local stream was polluted, and interpretations of the data varied. An informational video about the project and the creek was produced. (PVD)

  2. Waller Creek Urban Redevelopment 

    E-print Network

    McDonald, S.

    2013-01-01

    curtipendula - Sideoats Grama Muhlenbergia lindheimeir - Creek Muhly Panicum Virgatum - Switchgrass Schizachyrium scoparium - Little Bluestem Sorghastrum nutans - Indiangrass Elymus virginicus - Virginia Wildrye Rhizomaceous Plants, Grasses, Wildflowers Ruellia... drummondiana - Drummond Ruellia Justicia americana - Waterwillow Elymus virginicus - Virginia Wildrye Physostegia correllii - Correll's False Dragonhead Cephalanthus occidentalis - Buttonbush Cinna arundinacea - Woodland Cane Deep-rooted Shrubs and Perennials...

  3. Geochemical Data for Stream-Sediment, Surface-Water, Rock, and Vegetation Samples from Red Mountain (Dry Creek), an Unmined Volcanogenic Massive Sulfide Deposit in the Bonnifield District, Alaska Range, East-Central Alaska

    USGS Publications Warehouse

    Giles, Stuart A.; Eppinger, Robert G.; Granitto, Matthew; Zelenak, Philip P.; Adams, Monique G.; Anthony, Michael W.; Briggs, Paul H.; Gough, Larry P.; Hageman, Philip L.; Hammarstrom, Jane M.; Horton, John D.; Sutley, Stephan J.; Theodorakos, Peter M.; Wolf, Ruth E.

    2007-01-01

    North-central and northeast Nevada contains numerous large plutons and smaller stocks but also contains many small, shallowly emplaced intrusive bodies, including dikes, sills, and intrusive lava dome complexes. Decades of geologic investigations in the study area demonstrate that many ore deposits, representing diverse ore deposit types, are spatially, and probably temporally and genetically, associated with these igneous intrusions. However, despite the number and importance of igneous instrusions in the study area, no synthesis of geochemical data available for these rocks has been completed. This report presents a synthesis of composition and age data for these rocks. The product represents the first phases of an effort to evaluate the time-space-compositional evolution of Mesozoic and Cenozoic magmatism in the study area and identify genetic associations between magmatism and mineralizing processes in this region.

  4. Rock Hounds

    NSDL National Science Digital Library

    The Rock Hounds web site offers information for younger students on how igneous, sedimentary, and metamorphic rocks are formed, safety tips for collectors, and illustrated pages describing a selection of rock types. After studying these pages, kids can take a quiz or work rock-themed puzzles. For teachers, there is a lesson plan about the rock cycle, a set of activities, ideas for collaborative activities, and a review of some literature on rocks and rock collecting.

  5. Sedimentary Rocks

    NSDL National Science Digital Library

    Pamela Gore

    1995-10-18

    Sedimentary Rocks is a course handout that accompanies the discussion of sedimentary rocks. The objectives of the handout are: to explain the formation of sedimentary rocks in terms of the rock cycle; explain and give examples of the various sedimentary depositional environments; discuss the textural characteristics of sediments; explain why sedimentary rocks are important in the study of Earth history; contrast the basic groups of sedimentary rocks; describe the principle characteristics of common sedimentary rocks; and describe the ways in which sedimentary rocks are lithified. There are many photos, which show examples of different types of sedimentary rocks. Links are provided to the online Physical Geology resources at Georgia Perimeter College.

  6. Recurrent faulting and petroleum accumulation, Cat Creek Anticline, central Montana

    SciTech Connect

    Nelson, W.J. (Illinois State Geological Survey, Champaign (United States))

    1991-06-01

    The Cat Creek anticline, scene of central Montana's first significant oil discovery, is underlain by a south-dipping high-angle fault (Cat Creek fault) that has undergone several episodes of movement with opposite sense of displacement. Borehole data suggest that the Cat Creek fault originated as a normal fault during Proterozoic rifting concurrent with deposition of the Belt Supergroup. Reverse faulting took place in Late Cambrian time, and again near the end of the Devonian Period. The Devonian episode, coeval with the Antler orogeny, raised the southern block several hundred feet. The southern block remained high through Meramecian time, then began to subside. Post-Atokan, pre-Middle Jurassic normal faulting lowered the southern block as much as 1,500 ft. During the Laramide orogeny (latest Cretaceous-Eocene) the Cat Creek fault underwent as much as 4,000 ft of reverse displacement and a comparable amount of left-lateral displacement. The Cat Creek anticline is a fault-propagation fold; en echelon domes and listric normal faults developed along its crest in response to wrenching. Oil was generated mainly in organic-rich shales of the Heath Formation (upper Chesterian Series) and migrated upward along tectonic fractures into Pennsylvanian, Jurassic, and Cretaceous reservoir rocks in structural traps in en echelon domes. Production has been achieved only from those domes where structural closure was retained from Jurassic through Holocene time.

  7. Restoring Fossil Creek

    NSDL National Science Digital Library

    Carri J. LeRoy

    2004-07-01

    As part of an ongoing environmental project and partnership with a local university, high school students monitor changes to Fossil Creek in Arizona. Components of the project include fish behavior studies, responses to fishing, water chemistry measurements, aquatic invertebrate studies, photographic recording, riparian habitat transects, and small mammal trapping transects. The data collected will ultimately provide an invaluable annual record for students, working scientists, and the wider community as changes are monitored over time.

  8. Rock Cycle

    NSDL National Science Digital Library

    Moorland School

    This site, from Moorland School in England, describes the rock cycle. Topics briefly discussed include rock formation, erosion, transportation, and deposition, plus various types of rocks. The page is directed towards a middle-school audience.

  9. Rock Cycle

    NSDL National Science Digital Library

    Smoothstone

    This interactive Flash animation about the rock cycle is suitable for a review or overview in an introductory level Physical Geology class. It includes animations, photos, and descriptions involving rock types and processes in the rock cycle.

  10. 33 CFR 117.331 - Snake Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 1 2013-07-01 2013-07-01 false Snake Creek. 117.331 Section 117.331 Navigation... Specific Requirements Florida § 117.331 Snake Creek. The draw of the Snake Creek bridge, at Islamorada, Florida,...

  11. 33 CFR 117.331 - Snake Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 1 2010-07-01 2010-07-01 false Snake Creek. 117.331 Section 117.331 Navigation... Specific Requirements Florida § 117.331 Snake Creek. The draw of the Snake Creek bridge, at Islamorada, Florida,...

  12. 33 CFR 117.331 - Snake Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 1 2012-07-01 2012-07-01 false Snake Creek. 117.331 Section 117.331 Navigation... Specific Requirements Florida § 117.331 Snake Creek. The draw of the Snake Creek bridge, at Islamorada, Florida,...

  13. 33 CFR 117.331 - Snake Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 1 2014-07-01 2014-07-01 false Snake Creek. 117.331 Section 117.331 Navigation... Specific Requirements Florida § 117.331 Snake Creek. The draw of the Snake Creek bridge, at Islamorada, Florida,...

  14. 33 CFR 117.331 - Snake Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 1 2011-07-01 2011-07-01 false Snake Creek. 117.331 Section 117.331 Navigation... Specific Requirements Florida § 117.331 Snake Creek. The draw of the Snake Creek bridge, at Islamorada, Florida,...

  15. ADAMS GAP AND SHINBONE CREEK ROADLESS AREAS, ALABAMA.

    USGS Publications Warehouse

    Klein, T.L.; Harrison, Donald K.

    1984-01-01

    The Adams Gap and Shinbone Creek Roadless Areas in Alabama were evaluated for their mineral potential. The only resource within the established boundary of the roadless area is quartzite suitable for crushed rock or refractory-grade aggregate. The quartzite contains deleterious impurities and is found in abundance outside the areas. Natural gas or petroleum may exist at depth. Detailed seismic studies and deep drilling tests are needed before a reasonable estimate of hydrocarbon potential can be made.

  16. Tectonic significance of Currant Creek formation, north-central Utah

    SciTech Connect

    Isby, J.S.; Picard, M.D.

    1984-07-01

    The Currant Creek Formation is composed of conglomerate, sandstone, and fine-grained clastic rocks that crop out along the northwestern margin of the Uinta basin in north-central Utah. Lateral gradations in grain size define proximal, medial, and distal parts of coalescing alluvial-fan deposits that prograded eastward from the active Sevier-Laramide orogenic belt during Maestrichtian through Paleocene (.) time. Paleocurrent directions indicate a dominant southerly transport direction and a minor easterly component. Strong east and southeasterly directions, measured in imbricated clasts and in sand lenses in conglomerate, indicate multiple source areas for the detritus. Source of the coarse-grained detritus in the Currant Creek Formation was the Charleston thrust sheet. Conglomeratic clasts are composed of Precambrian and Cambrian quartzite, chert derived from Cambrian and Mississippian carbonate beds, and Pennsylvanian sandstone. These rocks are exposed in the upper plate of the Charleston thrust near Deer Creek Reservoir, Mount Timpanogos, and Strawberry Reservoir. At Big and Little Cottonwood Canyons, the same rocks are exposed in the lower plate.

  17. 40Ar– 39Ar white mica ages reveal Neoproterozoic\\/Paleozoic provenance and an Alleghanian overprint in coeval Upper Ordovician–Lower Devonian rocks of Meguma and Avalonia

    Microsoft Academic Search

    J. Brendan Murphy; Alan S. Collins

    2008-01-01

    40Ar–39Ar analyses (IR single grain, total fusion) of white micas from Upper Ordovician–Lower Devonian sedimentary strata in the Meguma (Annapolis section) and Avalon (Arisaig section) terranes of the Canadian Appalachians complement recent detrital zircon studies by providing constraints on local source areas and identifying the age of low temperature (<350 °C) events along this portion of the northern margin of the

  18. Fault tectonics and earthquake hazards in the Peninsular Ranges, Southern California. [including San Diego River, Otay Mts., Japatul Valley, Barrett Lake, Horsethief Canyon, Pine Valley Creek, Pine Creek, and Mojave Desert

    NASA Technical Reports Server (NTRS)

    Merifield, P. M. (principal investigator)

    1975-01-01

    The author has identified the following significant results. Thin sections of rock exposed along the San Diego River linear were prepared and determined to be fault breccia. Single band and ratio images of the western Mojave Desert were prepared from the multispectral scanner digital tapes. Subtle differences in color of soil and rock are enhanced on the ratio images. Two north-northeast trending linears (Horsethief Canyon and Pine Valley Creek) and an east-west linear (Pine Creek) were concluded to have resulted from erosion along well-developed foliation in crystalline basement rocks.

  19. Igneous Rocks

    NSDL National Science Digital Library

    This interactive lesson on igneous rocks begins with a comparison of intrusive and extrusive igneous rocks with diagrams to show their origin. This leads to a discussion of intrusive rock formations including dikes, sills, laccoliths and batholiths and a block diagram to show their location. Basaltic rocks are described to include basalt, pumice, and gabbro and are contrasted with granitic rhyolite and obsidian.

  20. Chollas in Pine Creek Canyon

    USGS Multimedia Gallery

    The Mojave Desert, home to drought-tolerant plants like Cholla cacti, gradually mixes with loblolly pine ecosystems in Pine Creek Canyon. Pine Creek Canyon is a remnant ecosystem of loblolly pines. A remnant ecosystem is the last vestige of an ecosystem type that used to be more widespred. Red Roc...

  1. REVIEW PLAN PINE CREEK LAKE

    E-print Network

    US Army Corps of Engineers

    #12;REVIEW PLAN PINE CREEK LAKE McCurtain County, Oklahoma DAM SAFETY MODIFICATION STUDY TULSA LEFT BLANK #12;REVIEW PLAN Pine Creek Lake, Oklahoma Dam Safety Modification Study TABLE OF CONTENTS Chapter # Chapter Title Page # 1. Purpose and Requirements 1 2. Review Management Organization (RMO

  2. Oxley Creek Common Brisbane, Australia

    E-print Network

    Queensland, University of

    Oxley Creek. The gate is always open. Amenities The main development at Oxley Creek Common is the Red Shed, which is beside the car park (plenty of space). The Red Shed has toilets (composting), water dogs, which scare a few species, often arrive at the Common very early. After heavy rain there can

  3. Igneous Rocks

    NSDL National Science Digital Library

    Lynn Fichter

    This site explores igneous rocks in-depth through descriptions and pictures. The formation and distribution of this rock type are covered, as well as magma types associated with them (mafic to felsic). Classification of igneous rocks covers their texture and composition, including the difference between intrusive and extrusive. An alphabetical listing of rocks connects the user with a description, picture, tectonic association, and mineral composition of the rock. Bowen's Reaction Series is covered as well, with associated rock types. A self-test allows the user to identify rocks by picture alone. Links are provided to sites with further information.

  4. Rock Cycle

    NSDL National Science Digital Library

    National Science Teachers Association (NSTA)

    2007-03-21

    The Rock Cycle SciPack explores different kinds and categories of rocks, the major processes through which they form and the cyclical nature of the formation and transformation of rock materials. The focus is on topics supporting Standards and Benchmarks related to the rock cycle as part of the transfer and transformation of matter and energy in Earth's system as well as a sense of the time scales involved and how rocks provide information about their own development and the history of Earth.In addition to comprehensive inquiry-based learning materials tied to Science Education Standards and Benchmarks, the SciPack includes the following additional components:? Pedagogical Implications section addressing common misconceptions, teaching resources and strand maps linking grade band appropriate content to standards. ? Access to one-on-one support via e-mail to content "Wizards".? Final Assessment which can be used to certify mastery of the concepts.Learning Outcomes:Rock Cycle: Categories by Process? List the three different types of rock. ? Make appropriate observations about rocks (e.g. describe rock composition and texture).? Make appropriate observations about the general environments in which the rocks formed.Rock Cycle: Environments of Formation? Realize that different rocks have specific origins, and that they are the product of any number of processes.? Identify the processes through which igneous, sedimentary, and metamorphic rock form.? Explain the role of intermediary materials such as sediment and magma in the formation of different kinds of rock.? Provide an overarching description of the steps in the rock cycle, the formation of sedimentary rock, the re-forming of rock by heat and pressure, and the process by which re-formed rock can return to the surface.Rock Cycle: Cycling? Recognize the formation and transformation processes as part of a continuing cycle.? Identify that while the form and location of different rocks change over time, the amount of material and the distribution among the elements remains constant.? Explain the different processes or paths that each type of rock may take in the rock cycle.Rock Cycle: Earth's Autobiography? State the amount of time over which the rock cycle has been in operation (4 billion years rather than 40 million or 400 million).? Recognize that the processes at work in the present are the same as those at work in the distant past.? Describe how rock formations and characteristics can be used to determine how different rock formed, making appropriate interpretations about the source of the rock, history and processes, and the environment of formation.? Describe how rocks provide a history of the changing surface of Earth and its lifeforms.

  5. Investigaing Rocks

    NSDL National Science Digital Library

    Tiffany A. Lindsey

    2010-06-21

    Your mission is to look at different types of rocks and be able to sort them based on color, feel, hardness, texture, layering they may have, and particle size they are made of. Identify how the properties of rocks determine how people use them. Click below to find out more about different kinds of rocks there are: Types of Rocks Now, Start Your Rock Collection! It's a race against time! Can you do it? Identify Rock Types How are rocks made? Check out: The Rock Cycle Now take the quiz: Diagram the rock cycle quiz Next, click the link to view the Virtual Quarry website. Here, you will be able to look at different rock ...

  6. Discoveries at Willow Creek

    NSDL National Science Digital Library

    In this storybook, students learn about making observations, taking scientific measurements and recording their findings in a science journal. In the story, students Simon, Anita and Dennis join Hannah, a local scientist, as they comparing spring and fall observations of changes they see at Willow Creek. This science-based storybook is the one of four under the title Elementary GLOBE. Each book also has companion learning activities that complement the science covered in each story. GLOBE (Global Learning and Observation to Benefit the Environment) is a worldwide, hands-on, K-12 school-based science education program.

  7. Bryant Creek Watershed Atlas

    NSDL National Science Digital Library

    The Bryant Creek Watershed Project created this online atlas filled with a wealth of information on every aspect of this Missouri watershed -- even for those who do not live near the site. Teachers can find interactive, fun lesson plans for kindergarten through twelfth grade dealing with many aspects of the physical environment. Students will find an abundance of games, quizzes, and interactive modules. By taking the photo tour, visitors can learn about the fascinating unique places connected to the watershed. Users can also find materials on the biologic, historic, social, and recreational aspects of the watershed.

  8. Wallace Creek Field Exercises

    NSDL National Science Digital Library

    This site contains model class exercises which instructors may find useful as class assignments to accompany class trips to the Wallace Creek site. These exercises are designed for college-level students who have had some background in geology and a general background of fault mechanics and earthquake geology. Particular questions in these exercises requires the students to conduct certain exercises or participate in appropriate discussions regarding geomorphology and slip rates. Five figures necessary to complete certain parts of the exercises are available for downloading.

  9. Discovering Rocks

    NSDL National Science Digital Library

    Mrs. Rollins

    2010-04-26

    Utah 2nd grade core, Standard 2, Objective 3: Investigate the properties and uses of rocks. Go to Mineral Identification to learn about identifying minerals. Make sure you take notes. Then go to About Rocks to learn a little more about rocks. See if you can identify some of the minerals in these rocks. Choose at least ten different rocks to learn about and write down what you think their ...

  10. Earth Rocks!

    NSDL National Science Digital Library

    Miss Ramirez

    2008-09-13

    You are Miss Ramirez\\'s scientist on a mission to identify the three types of rocks found on Earth! By the end of this web journey, you will be able to: define what a rock is and where they are found. identify the three types of rocks. recognize the three types of rock based on their characteristics. Here are the materials you will need: Box of rocks (provided by Miss Ramirez) Identification Worksheet (provided by ...

  11. Metals in Devonian kerogenous marine strata at Gibellini and Bisoni properties in southern Fish Creek Range, Eureka County, Nevada

    USGS Publications Warehouse

    Desborough, George A.; Poole, F.G.; Hose, R.K.; Radtke, A.S.

    1979-01-01

    A kerogen-rich sequence of siliceous mudstone, siltstone, and chert as much as 60 m thick on ridge 7129 in the southern Fish Creek Range, referred to as Gibellini facies of the Woodruff Formation, has been evaluated on the surface and in drill holes principally for its potential resources of vanadium, zinc, selenium, molybdenum, and syncrude oil content. The strata are part of a strongly deformed allochthonous mass of eugeosynclinal Devonian marine rocks that overlie deformed allochthonous Mississippian siliceous rocks and relatively undeformed autochthonous Mississippian Antler flysch at this locality. The vanadium in fresh black rocks obtained from drill holes and fresh exposures in trenches and roadcuts occurs chiefly in organic matter. Concentrations of vanadium oxide (V2O5) in unoxidized samples range from 3,000 to 7,000 ppm. In oxidized and bleached rock that is prevalent at the surface, concentrations of vanadium oxide range from 6,000 to 8,000 ppm, suggesting a tendency toward enrichment due to surficial weathering and ground-water movement. Zinc occurs in sphalerite, and selenium occurs in organic matter; molybdenum appears to occur both in molybdenite and in organic matter. Concentrations of zinc in unoxidized rock range from 4,000 to 18,000 ppm, whereas in oxidized rock they range from 30 to 100 ppm, showing strong depletion due to weathering. Concentrations of selenium in unoxidized rock range from 30 to 200 ppm, whereas in oxidized rock they range from 200 to 400 ppm, indicating some enrichment upon weathering. Concentrations of molybdenum in unoxidized rock range from 70 to 960 ppm, whereas in oxidized rock they range from 30 to 80 ppm, indicating strong depletion upon weathering. Most fresh black rock is low-grade oil shale, and yields as much as 12 gallons/short ton of syncrude oil. Metahewettite is the principal vanadium mineral in the oxidized zone, but it also occurs sparsely as small nodules and fillings of microfractures in unweathered strata. In fresh rock, bluish-white opaline-like silica (chalcedonic quartz) fills microfractures, and is believed to have originated by diagenetic mobilization of opaline silica from radiolarian tests and sponge spicules. As revealed by microscopic study, the Gibellini facies originally consisted of siliceous muds, slimes, and oozes high in organic constituents. The organic matter is amorphous flaky and stringy sapropel, and probably includes remains of bacteria, phytoplankton, zooplankton, and minor higher plants. Recognizable organic remnants include radiolarian tests, sponge spicules, conodonts, brachiopod shells, algae, and humic debris. Diagnostic radiolarians indicate a Late Devonian age for the Gibellini facies of the Woodruff Formation. Some pyrite is disseminated through the rock and may be primary (syngenetic) but significant pyrite and marcasite occur in chalcedonic quartz veinlets and appear to be diagenetic. In fresh rock, black solid bitumen and liquid oil fill voids and microfractures. These early phase hydrocarbons probably were released during diagenesis from complex nonhydrocarbon molecular structures originating from living organisms, and formed without any major thermal degradation of the kerogen. Gas chromatographic analysis of the saturated hydrocarbon fraction indicates a very complex mixture dominated by branched and cyclic compounds. Conodont and palynomorph color alteration, vitrinite reflectance, and other organic geochemical data suggest that the organic matter in the rock is thermally immature and has not been subjected to temperatures greater than 60?C since deposition in Devonian time. All of these characteristics are consistent with the interpretation of a relatively low temperature and a shallow-burial history for the Gibellini facies on ridge 7129.

  12. Figure S1. Rock backgrounds of Lake Malawi plotted in the colour space of the UV-sensitive visual system of the lake's rock dwelling cichlids. Excrement covered rock (triangles), brown rock (diamonds), other rocky patches (other

    E-print Network

    Carleton, Karen L.

    UVUV M L 445 425 351 650520 Erock1 Erock2 Erock3 Brock Figure S1. Rock backgrounds of Lake Malawi plotted in the colour space of the UV-sensitive visual system of the lake's rock dwelling cichlids. Excrement covered rock (triangles), brown rock (diamonds), other rocky patches (other symbols), and white

  13. Experimental study of opening-mode crack growth in rock. Progress report and renewal proposal

    SciTech Connect

    Gordon, R.B.

    1981-01-01

    The objective is to relate fracture toughness to rock microstructure. Crack propagation measurements are made on samples of stockbridge marble and Stony Creek granite. Force-displacement curves are recorded and the texture of the fracture surfaces observed. (ACR)

  14. Coyote Creek Geologic Map

    NSDL National Science Digital Library

    Timothy R. Walsh

    Students are required to make field observations, collect data and then create a detailed geologic map and report for a small area (approximately 1 sq. mile) on the edge of the Tularosa Basin in south central New Mexico. The study area is located within the Tularosa NE quadrangle, but maps from the Cat Mountain quadrangle to the East are also useful. Gently dipping carbonate and siliciclastic beds, igneous intrusions, bioherms and a normal fault are present in the study area along Coyote Creek, a few miles north of Tularosa, NM. The creek generally runs parallel to dip, allowing relatively easy access to inclined strata. Bioherm(s) are present in the lower section. Several dikes are present running both parallel and perpendicular to sedimentary bed strike. One is very non-resistant to weathering, creating unusual troughs as it passes through the carbonate bioherms. A sill is present in the upper section and a N/S trending normal fault roughly parallels strike of sedimentary beds.

  15. Ship Creek bioassessment investigations

    SciTech Connect

    Cushing, C.E.; Mueller, R.P.; Murphy, M.T.

    1995-06-01

    Pacific Northwest Laboratory (PNL) was asked by Elmendorf Air Force Base (EAFB) personnel to conduct a series of collections of macroinvertebrates and sediments from Ship Creek to (1) establish baseline data on these populations for reference in evaluating possible impacts from Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) activities at two operable units, (2) compare current population indices with those found by previous investigations in Ship Creek, and (3) determine baseline levels of concentrations of any contaminants in the sediments associated with the macroinvertebrates. A specific suite of indices established by the US Environmental Protection Agency (EPA) was requested for the macroinvertebrate analyses; these follow the Rapid Bioassessment Protocol developed by Plafkin et al. (1989) and will be described. Sediment sample analyses included a Microtox bioassay and chemical analysis for contaminants of concern. These analyses included, volatile organic compounds, total gasoline and diesel hydrocarbons (EPA method 8015, CA modified), total organic carbon, and an inductive-coupled plasma/mass spectrometry (ICP/MS) metals scan. Appendix A reports on the sediment analyses. The Work Plan is attached as Appendix B.

  16. FLINT CREEK RANGE WILDERNESS STUDY AREA, MONTANA.

    USGS Publications Warehouse

    Ericksen, George E.; Marks, Lawrence Y.

    1984-01-01

    A mineral survey of the Flint Creek Range Wilderness study area, Montana shows the presence of mineral deposits. By far the most important are low-grade, potentially large, contact-metamorphic tungsten deposits. A large stockwork molybdenum deposit is probably low in grade. The areas of these tungsten and molybdenum deposits have substantiated mineral-resource potential. A multimillion ton phosphate-rock deposit occurs in an area of substantiated resource potential in the Permian Phosphoria Formation in the south-central part of the study area. Deposits of massive quartz, perhaps suitable for smelter flux, a demonstrated resource. Small scattered silver- and gold-bearing veins are present, but no resource potential was identified.

  17. This Rock is Your Rock, This Rock is My Rock

    NSDL National Science Digital Library

    In this activity students discover that the types and relative proportion of minerals that occur together in a rock tell scientists the story of how that rock was formed. They also learn that rocks are named based on how they formed and by the types, amounts, and sizes of minerals in the rocks. Students will realize that one of the most important skills a geologist needs when studying a rock is the ability to observe and describe what he or she sees. As a result of this activity students will improve their observational skills and learn that rocks are made up of one or more minerals.

  18. Mineralogy of the deadhorse creek volcaniclastic breccia complex, northwestern Ontario, Canada

    NASA Astrophysics Data System (ADS)

    Potter, Eric G.; Mitchell, Roger H.

    2005-09-01

    The Proterozoic Deadhorse Creek volcaniclastic breccia complex was emplaced in Archean metasedimentary and metavolcanic rocks of the Schreiber-White River greenstone belt adjacent to the Proterozoic Coldwell alkaline complex. The western sub-complex of the Deadhorse Creek breccia consists of metasomatically-altered breccia, a U-Be-Zr-rich main mineralized zone and a Zr-Y-Th-rich carbonate vein. The main mineralized zone is enriched in beryllium, thorium, uranium, first and second row transition elements, and rare earth elements. The major minerals present include: albite; potassium feldspar; quartz; calcite; apatite; and phenakite. Accessory minerals include: aegirine-jervisite; aegirine-natalyite; allanite; barite; barylite; coffinite; Ca-Mn-silicate; magnetite; monazite-(Ce); niobian vanadian rutile; pyrite; thorite; thorogummite; thortveitite; uraninite; vanadian crichtonite; xenotime-(Y); zircon and hydrated zircon; and zircon-thorite-coffinite solid solutions. The carbonate vein consists of dolomite-ankerite and calcite with accessory zircon, xenotime, and monazite. Barite, baotite and Ba-rich feldspars, were formed during metasomatism of the earlier-formed and genetically-unrelated volcaniclastic breccia adjacent to the main mineralized zone. The complex mineral assemblage of the fault-controlled main mineralized zone is considered to have formed in three stages. An initial emplacement of a “granitic” melt/fluid was followed by introduction of CO2-bearing Cr-Nb-V-Ti-enriched alkaline fluids. The latter reacted with minerals which had crystallized from the “granitic” melt/fluid to produce the exotic V-, Sc- and Nb-bearing mineral assemblage. Subsequently, a supergene suite of minerals, consisting principally of calcite, thorogummite, hollandite and tyuyamanite, formed during post-Pleistocene alteration was superimposed onto the pre-existing Proterozoic age mineral assemblage. The major mineralogy of the main mineralized zone is essentially ‘granitic” and the melts/fluids are considered to be derived from an A-type granite source. However, the Deadhorse Creek mineralization is older (1129±6 Ma) than the A-type quartz syenites of the adjacent Coldwell complex (1108±1 Ma) which are the nearest potential sources of such melts. Thus, the source of the “granitic” melt together with that of the Cr-Nb-V-Ti-bearing alkaline fluids remains enigmatic.

  19. Lagrangian Sampling of Wastewater Treatment Plant Effluent in Boulder Creek, Colorado, and Fourmile Creek,

    E-print Network

    Lagrangian Sampling of Wastewater Treatment Plant Effluent in Boulder Creek, Colorado, and Fourmile of wastewater treatment plant effluent in Boulder Creek, Colorado, and Fourmile Creek, Iowa, during the summer...................................................................................................................... 5 Acidic Organic Wastewater Compounds

  20. Rock Cycle

    NSDL National Science Digital Library

    Maryland Virtual High School

    The purpose of this activity is to demonstrate the principle of conservation of mass through the rock cycle. When students create the model, the various parts and processes in the rock cycle are reinforced for them.

  1. Byrne Creek Power Project

    SciTech Connect

    Humphrey, A.E.; Fischer, D.D.; Whitman, D.L.

    1985-06-01

    The Byrne Creek Power Project was submitted in response to the US Synthetic Fuels Corporation's (SFC) 4th General Solicitation. The project represents the first commercial application of underground coal gasification (UCG) technology in the US. A 2 phase approach consisting of an engineering burn (EVB) prior to design finalization and construction of the commercial facility has been proposed to the SFC. The UCG plant produces sufficient raw intermediate-Btu gas such that a total of 38.3 Megawatts electric (MWe) of power are produced with 31.6 MWe for sale and the remaining 6.7 MWe for internal plant consumption. The project requires government loan and price guarantees prior to initiation of construction. The project, the current plant design, the costs associated with the project, the organizational structure and project participants, the EVB, and the status of the project with the SFC are discussed.

  2. 1. OVERALL VIEW OF WHITE MILLER LAKE AND UPSTREAM FACE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. OVERALL VIEW OF WHITE MILLER LAKE AND UPSTREAM FACE OF DAM, LOOKING NORTH - High Mountain Dams in Upalco Unit, White Miller Lake Dam, Ashley National Forest, 6.9 miles North of Swift Creek Campground, Mountain Home, Duchesne County, UT

  3. Collecting Rocks.

    ERIC Educational Resources Information Center

    Barker, Rachel M.

    One of a series of general interest publications on science topics, the booklet provides those interested in rock collecting with a nontechnical introduction to the subject. Following a section examining the nature and formation of igneous, sedimentary, and metamorphic rocks, the booklet gives suggestions for starting a rock collection and using…

  4. Metamorphic Rocks

    NSDL National Science Digital Library

    2007-12-12

    Here is an in-depth description of metamorphic rocks, from their classification to formation and identification. It covers types of metamorphism (including Barrovian, or regional rock changes), classification by foliation, and metamorphic processes (facies and zones). An alphabetical list of rocks with picture, composition, description, tectonic association, and type of metamorphism is given. Common metamorphic minerals are covered as well.

  5. Sedimentary Rocks

    NSDL National Science Digital Library

    Mrs. Walls

    2011-01-30

    Create a poster about sedimentary rocks! Directions: Make a poster about sedimentary rocks. (20 points) Include at least (1) large picture (15 points) on your poster complete with labels of every part (10 points). (15 points) Include at least three (3) facts about sedimentary rocks. (5 points each) (15 points) Write at least a three sentence summary of your poster ...

  6. Rock Finding

    ERIC Educational Resources Information Center

    Rommel-Esham, Katie; Constable, Susan D.

    2006-01-01

    In this article, the authors discuss a literature-based activity that helps students discover the importance of making detailed observations. In an inspiring children's classic book, "Everybody Needs a Rock" by Byrd Baylor (1974), the author invites readers to go "rock finding," laying out 10 rules for finding a "perfect" rock. In this way, the…

  7. Rock Art

    ERIC Educational Resources Information Center

    Henn, Cynthia A.

    2004-01-01

    There are many interpretations for the symbols that are seen in rock art, but no decoding key has ever been discovered. This article describes one classroom's experiences with a lesson on rock art--making their rock art and developing their own personal symbols. This lesson allowed for creativity, while giving an opportunity for integration…

  8. Igneous Rocks

    NSDL National Science Digital Library

    Mrs. Walls

    2011-01-30

    Create a poster about Igneous Rocks! Directions: Make a poster about Igneous Rocks. (20 points) Include at least (1) large picture (15 points) on your poster complete with labels of every part (10 points). (15 points) Include at least three (3) facts about igneous rocks. (5 points each) (15 points) Write at least a three sentence summary ...

  9. Sedimentary Rocks

    NSDL National Science Digital Library

    This interactive lesson about sedimentary rocks begins with weathering and sediments and shows a sediment size chart. Next, it covers the three processes by which sediments are changed to rock: compaction, cementation, and recrystallization. Stream deposits along with the difference between clastic and non-clastic rocks are discussed and the formation of coal, shale, sandstone, limestone, conglomerate, and breccia is explained.

  10. Rock Jeopardy!

    NSDL National Science Digital Library

    2014-09-18

    Students reinforce their understanding of rocks, the rock cycle, and geotechnical engineering by playing a trivia game. They work in groups to prepare Jeopardy-type trivia questions (answers) and compete against each other to demonstrate their knowledge of rocks and engineering.

  11. Mapping Evapotranspiration Units in the Basin and Range Carbonate-Rock Aquifer System, White Pine County, Nevada, and Adjacent Areas in Nevada and Utah

    USGS Publications Warehouse

    Smith, J. LaRue; Laczniak, Randell J.; Moreo, Michael T.; Welborn, Toby L.

    2007-01-01

    Accurate estimates of ground-water discharge are crucial in the development of a water budget for the Basin and Range carbonate-rock aquifer system study area. One common method used throughout the southwestern United States is to estimate ground-water discharge from evapotranspiration (ET). ET is a process by which water from the Earth's surface is transferred to the atmosphere. The volume of water lost to the atmosphere by ET can be computed as the product of the ET rate and the acreage of vegetation, open water, and moist soil through which ET occurs. The procedure used in the study groups areas of similar vegetation, water, and soil conditions into different ET units, assigns an average annual ET rate to each unit, and computes annual ET from each ET unit within the outer extent of potential areas of ground-water discharge. Data sets and the procedures used to delineate the ET-unit map used to estimate ground-water discharge from the study area and a qualitative assessment of the accuracy of the map are described in this report.

  12. Texture analysis for mapping Tamarix parviflora using aerial photographs along the Cache Creek, California

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Natural color photographs were used to detect the coverage of tamarix parviflora and other vegetation along a 40 km portion of Cache Creek in Northern California in 2001. Color aerial photos were digitized and georeferenced. Eight types of ground cover (tamarix patches, crops, roads, rocks, water bo...

  13. The Lyons Creek boat remains 

    E-print Network

    Neyland, Robert Stephen

    1990-01-01

    and artifacts dating to the colonial era were discovered during a dredging operation at Lyons Creek, a tributary of the Patuxent River, Calvert County, Maryland. Also recovered from the spoil area were ceramics, wine bottles, and kaolin tobacco pipes, which... Lyons Creek A Shortage of Boats 17 Ferriage 33 Lightering Tobacco Small Craft on the Patuxent River 35 Shallops and Sloops 48 Flats 61 Other Colonial-Era Small Craft 64 III ARTIFACTS AND DATING 68 A Lack of Provenience 68 Cannonballs 69...

  14. Dissepimental rugose corals of Upper Pennsylvanian (Missourian) rocks of Kansas

    E-print Network

    Cocke, J. M.

    1970-10-13

    Member and Raytown Limestone. In the Kansas City area the Paola is an algal calcilutite but differs from typical mound rock in containing encrusting blue-green algae and the Muncie Creek is a black shale. The Raytown has a relatively prolific fauna... Member and Raytown Limestone. In the Kansas City area the Paola is an algal calcilutite but differs from typical mound rock in containing encrusting blue-green algae and the Muncie Creek is a black shale. The Raytown has a relatively prolific fauna...

  15. The Elk Creek Carbonatite, Southeast Nebraska-An Overview

    SciTech Connect

    Carlson, M. P., E-mail: mcarlson1@unl.edu; Treves, S. B. [University of Nebraska, Nebraska Geological Survey (United States)

    2005-03-15

    A framework geophysical program in southeastern Nebraska during 1970 identified a near-circular feature having gravity relief of about 8 mgal and a magnetic anomaly of about 800 gammas. Analysis of the geophysical data provided a model of a cylindrical mass of indefinite length with a radius of 5500 ft (1676 m) and beveled at the basement surface at about 600 ft (183 m). At the approximate depth at which Precambrian rocks were expected, the initial test hole (2-B-71) encountered an iron-rich weathered zone overlying carbonate-rich rock. The carbonate rocks consist essentially of dolomite, calcite, and ankerite and lesser amounts of hematite, chlorite, phlogopite, barite, serpentine, pyrochlore, and quartz and contain barium, strontium, and rare earths. Total REE, P2O5, and 87Sr/86Sr ratios confirm the carbonatite identification. Texturally, the rocks range from fragmental to contorted to massive. Associated with the carbonatite are lesser amounts of basalt, lamprophyre, and syenite. Additional exploratory drilling has provided about 80,000 ft (24,384 m) of rock record and has penetrated about 3400 ft (1038 m) of carbonatite. The carbonatite is overlain by marine sediments of Pennsylvanian (Missourian) age. The surrounding Precambrian basement rocks are low-to medium-grade metamorphic gneiss and schist of island arc origin and granitic plutons. The Elk Creek carbonatite is located near the boundary between the Penokean orogen created at about 1.84 Ga (billion years) and the Dawes terrane (1.78 Ga) of the Central Plains orogen. This boundary strongly influenced the geometry of both the Midcontinent Rift System (1.1 Ga) and the Nemaha uplift (0.3 Ga). It is assumed that the emplacement of the Elk Creek carbonatite (0.5 Ga) was influenced similarly by the pre-existing tectonic sutures.

  16. Habitat Evaluation Procedures (HEP) Report; Carey Creek, Technical Report 2005.

    SciTech Connect

    Entz, Ray

    2005-05-01

    In August 2002, the Habitat Evaluation Procedure (HEP) was used to determine baseline habitat suitability on the Carey Creek property, an acquisition completed by the Kalispel Tribe of Indians in December 2001. Evaluation species and appropriate models include bald eagle, black-capped chickadee, Canada goose, mallard, yellow warbler, and white-tailed deer. Habitat Suitability Index (HSI) values were visually estimated and agreed upon by all HEP team members. The Carey Creek Project provides a total of 172.95 Habitat Units (HUs) for the species evaluated. Conifer forest habitat provides 4.91 HUs for bald eagle, black-capped chickadee, and white-tailed deer. Forested wetlands provide 52.68 HUs for bald eagle, black-capped chickadee, mallard, and white-tailed deer. Scrub-shrub wetlands provide 2.82 HUs for mallard, yellow warbler and white-tailed deer. Wet meadow and grassland meadow provide 98.13 HUs for mallard and Canada goose. Emergent wetlands provide 11.53 HUs for mallard, muskrat, and Canada goose. Open water provides 2.88 HUs for Canada goose, mallard, and muskrat. The objective of using HEP at the Carey Creek Project and other protected properties is to document the quality and quantity of available habitat for selected wildlife species. In this way, HEP provides information on the relative value of the same area at future points in time so that the effect of management activities on wildlife habitat can be quantified. When combined with other tools, the baseline HEP will be used to determine the most effective on-site management, restoration, and enhancement actions to increase habitat suitability for targeted species. The same process will be replicated every five years to quantitatively evaluate the effectiveness of management strategies in improving and maintaining habitat conditions while providing additional crediting to BPA for enhanced habitat values.

  17. The geology and mechanics of formation of the Fort Rock Dome, Yavapai County, Arizona

    USGS Publications Warehouse

    Fuis, Gary S.

    1996-01-01

    The Fort Rock Dome, a craterlike structure in northern Arizona, is the erosional product of a circular domal uplift associated with a Precambrian shear zone exposed within the crater and with Tertiary volcanism. A section of Precambrian to Quaternary rocks is described, and two Tertiary units, the Crater Pasture Formation and the Fort Rock Creek Rhyodacite, are named. A mathematical model of the doming process is developed that is consistent with the history of the Fort Rock Dome.

  18. Rock and the Rock Cycle

    NSDL National Science Digital Library

    This interactive rock cycle shows students how all rock types are recycled into other types, and how the cycle progresses. Materials include the definitions of each rock type (igneous, sedimentary, metamorphic), how they change over time, and how tectonic movements help to drive the process.

  19. Petrography and geochemistry of selected lignite beds in the Gibbons Creek mine (Manning Formation, Jackson Group, Paleocene) of east-central Texas

    USGS Publications Warehouse

    Warwick, P.D.; Crowley, S.S.; Ruppert, L.F.; Pontolillo, J.

    1997-01-01

    This study examined the petrographic and geochemical characteristics of two lignite beds (3500 and 4500 beds, Manning Formation, Jackson Group, Eocene) that are mined at the Gibbons Creek mine in east-central Texas. The purpose of the study was to identify the relations among sample ash yield, coal petrography, and trace-element concentrations in lignite and adjoining rock layers of the Gibbons Creek mine. Particular interest was given to the distribution of 12 environmentally sensitive trace elements (As, Be, Cd, Cr, Co, Hg, Mn, Ni, Pb, Sb, Se, and U) that have been identified as potentially hazardous air pollutants (HAPs) in the United States Clean Air Act Amendments of 1990. Eleven lignite, floor, and rock parting samples were collected from incremental channel samples of the 3500 and 4500 beds that were exposed in a highwall of pit A3 at the Gibbons Creek mine. Short proximate and ultimate and forms of sulfur analyses were performed on all lignite samples, and lignite and rock samples were analyzed for 60 major, minor and trace elements. Representative splits of all lignite samples were ground and cast into pellets, and polished for petrographic analyses in blue-light fluorescence and reflected white light to determine liptinite, inertinite, and huminite maceral group percentages. The following observations summarize our results and conclusions about the geochemistry, petrography, and sedimentology of the 3500 and 4500 beds of the Gibbons Creek lignite deposit: (1) Weighted average dry (db) ash yield for the two beds is 29.7%, average total sulfur content is 2.6%, and average calorific value is 7832 Btu (18.22 MJ/kg). Ash yields are greatest in the lower bench (59.33% db) of the 3500 bed and in the upper bench of the 4500 bed (74.61% db). (2) For lignite samples (on a whole-coal basis), the distributions of two of the HAPs (Pb and Sb) are positively related to ash yield, probably indicating an inorganic affinity for these elements. By using cluster analysis we found that Be and Cd were poorly associated with ash yield, indicating a possible organic affinity, and that Ni, Se, Hg, U, and Pb cluster with most of the rare-earth elements. (3) The dominance of the crypto-eugelinite maceral subgroup over the crypto-humotelinite subgroup suggests that all Gibbons Creek lignites were subjected to peat-forming conditions (either biogenic or chemical) conducive to the degradation of wood cellular material into matrix gels, or that original plant material was not very woody and was prone to formation of matrix gels. The latter idea is supported by pollen studies of Gibbons Creek lignite beds; results indicate that the peat was derived in part from marsh plants low in wood tissue. (4) The occurrence of siliceous sponge spicules in the lower benches of the 3500 bed suggests the original peat in this part of the bed was deposited in standing, fresh water. (5) The petrographic data indicate that the upper sample interval of the 3500 bed contains more inertinite (3%) than the other samples studied. Increases in inertinite content in the upper part of the 3500 bed may have been associated with alteration of the peat by acids derived from the volcanic ash or could have been caused by fire, oxidation and drying, or biologic alteration of the peat in the paleo-mire. ?? 1997 Elsevier Science B.V.

  20. 77 FR 73650 - Peabody Trout Creek Reservoir LLC;

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-11

    ...No. 14446-001] Peabody Trout Creek Reservoir LLC; Notice of Preliminary Permit Application...November 30, 2012, Peabody Trout Creek Reservoir LLC (Peabody) filed an application...feasibility of the Peabody Trout Creek Reservoir Hydroelectric Project (Trout Creek...

  1. Nekton use of intertidal creek edges in low salinity salt marshes of the Yangtze River estuary along a stream-order gradient

    NASA Astrophysics Data System (ADS)

    Jin, Binsong; Qin, Haiming; Xu, Wang; Wu, Jihua; Zhong, Junsheng; Lei, Guangchun; Chen, Jiakuan; Fu, Cuizhang

    2010-07-01

    Non-vegetated creek edges were investigated to explore spatial nekton use patterns in a low salinity intertidal salt marsh creek network of the Yangtze River estuary along a stream-order gradient with four creek orders. Non-vegetated creek edges were arbitrarily defined as the approximately 3 m extending from the creek bank (the marsh-creek interface) into open water. Nekton was sampled using seine nets during daytime high slack water during spring tides for two or three days each in May through July 2008. Twenty-three nekton species (16 fishes and 7 crustaceans) were caught during the study. Fishes were dominated by gobies ( Mugilogobius abei, Periophthalmus magnuspinnatus, Periophthalmus modestus, Synechogobius ommaturus), mullets ( Chelon haematocheilus, Liza affinis) and Chinese sea bass ( Lateolabrax maculatus). Crustaceans were dominated by mud crab ( Helice tientsinensis) and white prawn ( Exopalaemon carinicauda). Rank abundance curves revealed higher evenness of nekton assemblages in lower-order creeks compared to higher-order creeks. Fish abundance tended to increase with increasing creek order. Crustacean abundance was higher in the first-third order creeks than in the fourth-order creek. Dominant nekton species displayed various trends in abundance and length-frequency distributions along the stream-order gradient. The spatial separation of nekton assemblages between the first-third order creeks and the fourth-order creek could be attributed to geomorphological factors (distance to mouth and cross-sectional area). These findings indicate that both lower- and higher-order creek edges play important yet different roles for nekton species and life history stages in salt marshes.

  2. 33 CFR 334.240 - Potomac River, Mattawoman Creek and Chicamuxen Creek; U.S. Naval Surface Weapons Center, Indian...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Mattawoman Creek and Chicamuxen Creek; U.S. Naval Surface Weapons Center, Indian Head Division, Indian Head, Md. 334...Mattawoman Creek and Chicamuxen Creek; U.S. Naval Surface Weapons Center, Indian Head Division, Indian Head, Md....

  3. 33 CFR 334.240 - Potomac River, Mattawoman Creek and Chicamuxen Creek; U.S. Naval Surface Weapons Center, Indian...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Mattawoman Creek and Chicamuxen Creek; U.S. Naval Surface Weapons Center, Indian Head Division, Indian Head, Md. 334...Mattawoman Creek and Chicamuxen Creek; U.S. Naval Surface Weapons Center, Indian Head Division, Indian Head, Md....

  4. Big Bayou Creek and Little Bayou Creek Watershed Monitoring Program

    SciTech Connect

    Kszos, L.A.; Peterson, M.J.; Ryon; Smith, J.G.

    1999-03-01

    Biological monitoring of Little Bayou and Big Bayou creeks, which border the Paducah Site, has been conducted since 1987. Biological monitoring was conducted by University of Kentucky from 1987 to 1991 and by staff of the Environmental Sciences Division (ESD) at Oak Ridge National Laboratory (ORNL) from 1991 through March 1999. In March 1998, renewed Kentucky Pollutant Discharge Elimination System (KPDES) permits were issued to the US Department of Energy (DOE) and US Enrichment Corporation. The renewed DOE permit requires that a watershed monitoring program be developed for the Paducah Site within 90 days of the effective date of the renewed permit. This plan outlines the sampling and analysis that will be conducted for the watershed monitoring program. The objectives of the watershed monitoring are to (1) determine whether discharges from the Paducah Site and the Solid Waste Management Units (SWMUs) associated with the Paducah Site are adversely affecting instream fauna, (2) assess the ecological health of Little Bayou and Big Bayou creeks, (3) assess the degree to which abatement actions ecologically benefit Big Bayou Creek and Little Bayou Creek, (4) provide guidance for remediation, (5) provide an evaluation of changes in potential human health concerns, and (6) provide data which could be used to assess the impact of inadvertent spills or fish kill. According to the cleanup will result in these watersheds [Big Bayou and Little Bayou creeks] achieving compliance with the applicable water quality criteria.

  5. 'Earhart' Rock

    NASA Technical Reports Server (NTRS)

    2004-01-01

    This false-color image taken by NASA's Mars Exploration Rover Opportunity shows a rock informally named 'Earhart' on the lower slopes of 'Endurance Crater.' The rock was named after the pilot Amelia Earhart. Like 'Escher' and other rocks dotting the bottom of Endurance, scientists believe fractures in Earhart could have been formed by one of several processes. They may have been caused by the impact that created Endurance Crater, or they might have arisen when water leftover from the rock's formation dried up. A third possibility is that much later, after the rock was formed, and after the crater was created, the rock became wet once again, then dried up and developed cracks. Rover team members do not have plans to investigate Earhart in detail because it is located across potentially hazardous sandy terrain. This image was taken on sol 219 (Sept. 4) by the rover's panoramic camera, using its 750-, 530- and 430-nanometer filters.

  6. Earth Rocks!

    NSDL National Science Digital Library

    Integrated Teaching and Learning Program,

    The purpose of this lesson is to introduce students to the basic elements of our Earth's crust: rocks, soils and minerals. They learn how we categorize rocks, soils and minerals and how they are literally the foundation for our civilization. Students also explore how engineers use rocks, soils and minerals to create the buildings, roads, vehicles, electronics, chemicals, and other objects we use to enhance our lives.

  7. Rock flows

    NASA Technical Reports Server (NTRS)

    Matveyev, S. N.

    1986-01-01

    Rock flows are defined as forms of spontaneous mass movements, commonly found in mountainous countries, which have been studied very little. The article considers formations known as rock rivers, rock flows, boulder flows, boulder stria, gravel flows, rock seas, and rubble seas. It describes their genesis as seen from their morphological characteristics and presents a classification of these forms. This classification is based on the difference in the genesis of the rubbly matter and characterizes these forms of mass movement according to their source, drainage, and deposit areas.

  8. PECONIC ESTUARY PROGRAM TIDAL CREEK STUDY

    EPA Science Inventory

    EEA evaluated ten tidal creeks throughout the Peconic Estuary representing a wide range of watershed variables. Primary focus was directed towards the collection and analysis of the macrobenthic invertebrate communities of these ten tidal creeks. Analysis of the macrobenthic comm...

  9. 78 FR 12714 - Intermountain Region, Payette National Forest, New Meadows Ranger District, Idaho; Lost Creek...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-25

    ...Creek-Boulder Creek Landscape Restoration Project AGENCY...Creek-Boulder Creek Landscape Restoration Project. The Lost Creek- Boulder Creek Landscape Restoration Project area...Official will determine what design features,...

  10. Temperature, size, and depth of the magma reservoir for the Taylor Creek Rhyolite, New Mexico

    USGS Publications Warehouse

    Duffield, W.A.; du Bray, E.A.

    1990-01-01

    The 55 km3 mid-Tertiary Taylor Creek Rhyolite in southwestern New Mexico consists of 20 lava domes and flows. This rhyolite is metaluminous to weakly peraluminous. Compositional zonation in feldspar phenocrysts is very minor and nonsystematic. The compositions of each feldspar species vary little throughout the suite of analyzed samples. This chemical homogeneity of phenocrysts reflects similar whole-rock homogeneity and suggests that the lavas were tapped from a single large reservoir of magma. Ages of sanidine phenocrysts determined using 40Ar/39Ar indicate that the Taylor Creek Rhyolite lavas were emplaced during a period of less than 0.42 my. and possibly less than 0.13 m.y., which is consistent with the single-reservoir scenario. Two-feldspar geothermometry suggests that Taylor Creek Rhyolite phenocrysts crystallized at about 775??C, at an assumed pressure of 2 kbar. Fe-Ti-oxide geothermometry suggests phenocryst growth at about 800??C. Experimental studies suggest that quartz and potassium-feldspar crystals that grow from H2O-undersaturated granitic magmas should exhibit resorption texture, a texture ubiquitous to Taylor Creek Rhyolite quartz and sanidine phenocrysts. We tentatively conclude that the Taylor Creek Rhyolite magma was H2O undersaturated and subliquidus at an unspecified pressure greater than 0.5 kbar during phenocryst growth and that Taylor Creek Rhyolite pyroclastic deposits formed because volatile saturation developed during the ascent of magma to sites of eruption. -from Authors

  11. Grizzly Bear Creek Flooding May 2015, SD

    USGS Multimedia Gallery

    Grizzly Bear Creek in Keystone, SD, on May 24, 2015. USGS streamgage 06403850 (Grizzly Bear Creek near Keystone, SD) showed the creek was more than one-half foot above flood stage on May 24. This streamgage is operated in cooperation with the METWARN (Rapid City/Pennington County Emer...

  12. LITTLE CONESTOGA CREEK WATERSHED ASSESSMENT, LANCASTER, PA.

    E-print Network

    Marshall, Jeffrey S.

    LITTLE CONESTOGA CREEK WATERSHED ASSESSMENT, LANCASTER, PA. FACULTY Andy deWet, Franklin & Marshall Run is closer to the expected exponential curve. #12;LITTLE CONESTOGA CREEK WATERSHED ASSESSMENT. The Little Conestoga Creek Watershed in Lancaster County, PA including project locations (1 = Bachman Run, 2

  13. FIELD EVALUATION OF THE MYRTLE CREEK ADVANCED

    E-print Network

    Bertini, Robert L.

    FIELD EVALUATION OF THE MYRTLE CREEK ADVANCED CURVE WARNING SYSTEM Final Report SPR 352 #12;#12;FIELD EVALUATION OF THE MYRTLE CREEK ADVANCED CURVE WARNING SYSTEM SPR 352 Final Report by Robert L's Catalog No. 5. Report Date June 2006 4. Title and Subtitle Field Evaluation of the Myrtle Creek Advanced

  14. 8 May 2008 SONOMA CREEK WATERSHED

    E-print Network

    areas will guide the stakeholders of the Sonoma Creek watershed participating in the Critical Coastal8 · May 2008 May 2008 SONOMA CREEK WATERSHED A tool for developing an action plan for the Critical understand current conditions and develop strategies for environmental recovery in the Sonoma Creek watershed

  15. Hydrological characterization of Birch Creek Basin

    Microsoft Academic Search

    Koslow

    1984-01-01

    A hydrological characterization of the Birch Creek Basin has been conducted to analyze the flood potential from Birch Creek on the Idaho National Engineering Laboratory (INEL). Birch Creek originated from springs below Gilmore Summit, between the Lemhi and Beaverhead Mountain Ranges, and flows in a southeasterly direction onto the Snake River Plain. The channel leads to a depression on the

  16. Asotin Creek Model Watershed Plan

    SciTech Connect

    Browne, D.; Holzmiller, J.; Koch, F.; Polumsky, S.; Schlee, D.; Thiessen, G.; Johnson, C.

    1995-04-01

    The Asotin Creek Model Watershed Plan is the first to be developed in Washington State which is specifically concerned with habitat protection and restoration for salmon and trout. The plan is consistent with the habitat element of the ``Strategy for Salmon``. Asotin Creek is similar in many ways to other salmon-bearing streams in the Snake River system. Its watershed has been significantly impacted by human activities and catastrophic natural events, such as floods and droughts. It supports only remnant salmon and trout populations compared to earlier years. It will require protection and restoration of its fish habitat and riparian corridor in order to increase its salmonid productivity. The watershed coordinator for the Asotin County Conservation District led a locally based process that combined local concerns and knowledge with technology from several agencies to produce the Asotin Creek Model Watershed Plan.

  17. Rocks and Minerals

    NSDL National Science Digital Library

    richrigby

    2010-02-23

    Rock Cycle Mineralogy 4 Kids Mineralogy 4 kids : rockin Internet site : the best place to learn about rocks and minerals Rock Cycle Map Rocks and Minerals Rocks and Minerals Pictures Rocks and Minerals Slide Show Rocks and Minerals Slide Show Earth Science Earth Science Uses for Minerals Metamorphic Rock Forming Sedimentary Rocks Observation ...

  18. Development of Rock Engineering

    NSDL National Science Digital Library

    This chapter describes the development of rock engineering and provides introductory descriptions of the following concepts: rockbursts and elastic theory, discontinuous rock masses, engineering rock mechanics, geological data collection, laboratory testing of rock, rock mass classification, rock mass strength, in situ stress measurements, groundwater problems, rock reinforcement, excavation methods in rock, and analytical tools used in rock engineering.

  19. CLOUD PEAK CONTIGUOUS, ROCK CREEK, PINEY CREEK, AND LITTLE GOOSE ROADLESS AREAS, WYOMING.

    USGS Publications Warehouse

    Segerstrom, Kenneth; Brown, Don S.

    1984-01-01

    On the basis of mineral surveys, study areas surrounding the Cloud Peak Primitive Area in northern Wyoming offer little promise for the occurrence of mineral or energy resources. The geologic setting precludes the existence of deposits of organic fuels. Nonmetallic commodities, such as feldspar, limestone, building stone, clay, sand, and gravel are present, but these materials are readily available nearby in large quantities in more accessible areas.

  20. Monument Creek hydraulics project

    NSDL National Science Digital Library

    Eric Leonard

    Students are given some general questions (file "IntroQuestions_07.pdf") related to project design during the class session before the main project is handed out. They need to use their textbook and/or other class resources to attempt to answer these questions and to prepare to discuss them the next class session. These questions concern field reconstruction of flood hydraulics, specifically. of bankfull flow. At this next class session we discuss their answers to the preliminary questions. Students are then given the main project handout (Monument_Ck_Problem_07.pdf). This gives them the general questions to be answered in the project. After reading it, students brainstorm again as a class about how to go about answering the questions. Students then divide themselves into research of three. These teams will synthesize data together and ultimately write up the project together. Each team then sends one member to join members of other teams to do one of the three main aspects of the field or computer work (1) field identification of the bankfull channel and measurement of bankfull channel geometry, (2) field determination of modern channel roughness from modern stream hydraulics (Manning's n is back-calculated from present channel geometry and flow), (3) development of a flood-frequency curve for this reach of Monument Creek from USGS discharge data. These working groups (with one member from each research team) work initially independently in the field and subsequently doing calculations in the lab, or on the computer. Once each working group has completed what it can do on its own, these groups split up and each member of each group carries the groups results back to his/her research team, and explains to the other members of the research team what he/she has done to this point and what results he/she has for the team. The team then works to synthesize he results into an overall answer to the questions posed at the beginning of the lab (confusing enough for you?). Each research team then writes up the results, sometimes (as in 2007) as a lab write up, in other years in scientific paper format. Whether the project is turned in simply as a lab write up or as a scientific paper, students are always asked to assess sources of error and how they might affect the results. Key words: Fluvial geomorphology, fluvial hydraulics, bankfull discharge, flood-frequency analysis Designed for a geomorphology course

  1. Art Rocks with Rock Art!

    ERIC Educational Resources Information Center

    Bickett, Marianne

    2011-01-01

    This article discusses rock art which was the very first "art." Rock art, such as the images created on the stone surfaces of the caves of Lascaux and Altimira, is the true origin of the canvas, paintbrush, and painting media. For there, within caverns deep in the earth, the first artists mixed animal fat, urine, and saliva with powdered minerals…

  2. Sediment dynamics of an impounded river: Yegua Creek, Texas 

    E-print Network

    Martinez, Adriana Elizabeth

    2009-05-15

    distribution............. 58 25 Davidson Creek cumulative particle size distribution curves .................... 58 26 Nails and Cedar Creek cumulative particle size distribution curves.......... 59 27 Median bed sediment sizes, Yegua Creek..., cohesive sediment (Chin et al., 2002). Field observations provided preliminary evidence of substantially coarser bed material throughout West Yegua Creek (Fig. 10), Nails Creek (Fig. 11) and lower Middle Yegua Creek (Fig. 8). Banks along Yegua Creek...

  3. White Course White Course

    E-print Network

    Thompson, Anne

    West Campus Dr White Course Dr O rchard Rd Tower Rd H a s t i n g s R d FoxHollowRd 26 26 26 BUS 322 C12 Agricultural Engineering E5 Agricultural Science & Industries E6 All-Sports Museum D10 Almquist

  4. White Course White Course

    E-print Network

    Boyer, Elizabeth W.

    Dr Dauer Rd West Campus Dr White Course Dr O rchard Rd Tower Rd H a s t i n g s R d FoxHollowRd 26 26 C12 Agricultural Engineering E5 Agricultural Science & Industries E6 All-Sports Museum D10 Almquist

  5. LINCOLN CREEK ROADLESS AREA, NEVADA.

    USGS Publications Warehouse

    John, David A.; Stebbins, Scott A.

    1984-01-01

    On the basis of a mineral survey, the Lincoln Creek Roadless Area, Nevada was determined to have little likelihood for the occurrence of mineral resources. Geologic terrane favorable for the occurrence of contact-metasomatic tungsten deposits exists, but no evidence for this type of mineralization was identified. The geologic setting precludes the occurrence of fossil fuels and no other energy resources were identified.

  6. OXYGEN AERATION AT NEWTOWN CREEK

    EPA Science Inventory

    A successful initial feasibility investigation of oxygen aeration at the 0.11-cu m/sec (2.5-mgd) municipal wastewater treatment plant in Batavia, New York, prompted a larger demonstration at New York City's 13.6-cu m/sec (310-mgd) Newtown Creek Plant. A 34-mo evaluation was perfo...

  7. Oxley Creek Common Brisbane, Australia

    E-print Network

    Queensland, University of

    development at Oxley Creek Common is the Red Shed, which is beside the car park (plenty of space). The Red) and 9am in the winter. On most weekends, The Mound near the Red Shed is used by model aircraft enthusiasts. People walking dogs, which scare a few species, often arrive at the Common very early. Path near

  8. External Resource: Rock and the Rock Cycle

    NSDL National Science Digital Library

    1900-01-01

    This Windows to the Universe interactive site investigates the rock cycle and illustrates that over millions of years, rocks are recycled into other rocks. Topics: rock cycle, igneous, metamorphic, sedimentary, plate tectonics, and geologic time.

  9. Geologic map of the Redwood Creek drainage basin, Humboldt County, California

    USGS Publications Warehouse

    Harden, Deborah Reid; Kelsey, H.M.; Morrison, S.D.; Stephens, T.A.

    1982-01-01

    A 1:62,500-scale geologic map with 14 rock stratigraphic units and an accompanying explanatory text are used to describe the geology of the Redwood Creek drainage basin of northwestern California. A large part of Redwood National Park is located in the downstream part of this actively eroding drainage basin. The bedrock consists primarily of Mesozoic sedimentary and metamorphic rocks. The structurally complex Franciscan assemblage of rocks underlies most of the basin, but rocks of the Klammath Mountain tectonic province occurs in a small eastern part of the basin. Most major boundaries between Mesozoic rock units are north-northwest trending faults parallel to the regional structural trend. Extensive areas of surficial coastal plain sediments, landslide deposits, stream terrace deposits and modern alluvium are also present; these areas help identify loci of vigorous recent erosion. (USGS)

  10. Rock Cycle

    NSDL National Science Digital Library

    Integrated Teaching and Learning Program,

    Through five lessons, students are introduced to all facets of the rock cycle. Topics include rock and mineral types, material stresses and weathering, geologic time and fossil formation, the Earth's crust and tectonic plates, and soil formation and composition. Lessons are presented in the context of the related impact on humans in the form of roadway and tunnel design and construction, natural disasters, environmental site assessment for building structures, and measurement instrumentation and tools. Hands-on activities include experiencing tensional, compressional and shear material stress by using only hand force to break bars of soap; preparing Jeopardy-type trivia questions/answers for a class game that reinforces students' understanding of rocks and the rock cycle; creating "fossils" using melted chocolate; working within design constraints to design and build a model tunnel through a clay mountain; and soil sampling by creating tools, obtaining soil cores, documenting a soil profile log, and analyzing the findings to make engineering predictions.

  11. Igneous Rocks

    NSDL National Science Digital Library

    Smoothstone

    This interactive Flash page provides information about the formation and crystallization of igneous rocks. It includes pictures and animations with supplementary information and is suitable for high school or introductory level undergraduate physical geology courses.

  12. Collecting Rocks

    NSDL National Science Digital Library

    This basic guide provides information about starting and maintaining a rock collection. Topics include starting a collection, identifying specimens, where and how to collect, and how to house and document a collection.

  13. Stream sediment detailed geochemical survey for Date Creek Basin, Arizona

    SciTech Connect

    Butz, T.R.; Tieman, D.J.; Grimes, J.G.; Bard, C.S.; Helgerson, R.N.; Pritz, P.M.

    1980-06-30

    Results of the Date Creek Basin detailed geochemical survey are reported. Field and laboratory data are reported for 239 stream sediment samples. Statistical and areal distributions of uranium and possible uranium-related variables are displayed. A generalized geologic map of the area is provided, and pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Based on stream sediment geochemical data, significant concentrations of uranium are restricted to the Anderson Mine area. The 84th percentile concentrations of U-FL, U-NT, and U-FL/U-NT combined with low thorium/U-NT values reflect increased mobility and enrichment of uranium in the carbonate host rocks of that area. Elements characteristically associated with the uranium mineralization include lithium and arsenic. No well defined diffusion halos suggesting outliers of similar uranium mineralization were observed from the stream sediment data in other areas of the Date Creek Basin. Significant concentrations of U-FL or U-NT found outside the mine area are generally coincident with low U-FL/U-NT values and high concentrations of zirconium, titanium, and phosphorus. This suggests that the uranium is related to a resistate mineral assemblage derived from surrounding crystalline igneous and metamorphic rocks.

  14. Match Rock

    NSDL National Science Digital Library

    Eric Muller

    2003-01-01

    In this activity, learners try to figure out who has their matching rock type by reading a description of their rock (no talking!). This activity can be used in a variety of ways: to introduce students to each other (icebreaker), to improve communication and writing skills, to introduce classification schemes and taxonomy, and to show how scientists use observations and descriptions to draw links between others' data and interpretations.

  15. Cache Creek terrane entrapment: Oroclinal paradox within the Canadian Cordillera

    NASA Astrophysics Data System (ADS)

    Mihalynuk, Mitch G.; Nelson, Joanne; Diakow, Larry J.

    1994-06-01

    Exotic and far-traveled oceanic crustal rocks of the Cache Creek terrane (CC) are bordered by less exotic Quesnel (QN) and Stikine (ST) arc terranes to the east, north, and west. All of these terranes are enveloped by an arcuate belt of displaced continental margin rocks; the Kootenay (KO), Nisling (NS), and parts of the Yukon-Tanana (YTT) terranes, that have indirect ties to ancestral North America (NA). Initial 87Sr/86Sr isopleths conform to this arcuate pattern. Such a pattern of concentric belts presents a geological conundrum: How did the QN, ST, and CC come to be virtually enveloped by terranes with ties to NA? Past and current models that explain assembly of the Canadian Cordillera are deficient in their treatment of this problem. We propose that Early Mesozoic QN and ST were joined through their northern ends as two adjacent arc festoons that faced south toward the Cache Creek ocean (Panthalassa?). Oceanic plateau remnants within the CC today were transported from the Tethyan realm and collided with these arcs during subduction of the Cache Creek ocean. Counterclockwise oroclinal rotation of ST and NS terranes in the Late Triassic to Early Jurassic caused enclosure of the CC. Rotation continued until these terranes collided with QN in the Middle Jurassic. Paleomagnetic declination data provide support for this model in the form of large average anticlockwise rotations for Permian to Early Jurassic sites in ST but moderate clockwise rotations for sites in QN. Specific modern analogues for the Cordilleran orocline include the Yap trench, where the Caroline rise is colliding end-on with the Mariana Arc and the Banda Arc, located on the southeastern "tail" of the Asian plate, which is being deformed into a tight loop by interactions with the Australian and Pacific plates.

  16. Geology of crystalline rocks of northern Fiordland: details of the granulite facies Western Fiordland Orthogneiss and associated rock units

    USGS Publications Warehouse

    Bradshaw, J.Y.

    1990-01-01

    A c. 700 km2 area of northern Fiordland (South Island, New Zealand) is described in which Early Cretaceous high-pressure metamorphic rocks and virtually unmetamorphosed plutonic rocks occur. The dominant rocks are orthogneisses developed from synmetamorphic basic-intermediate intrusive complexes, the youngest and most widespread of which is the Early Cretaceous Western Fiordland Orthogneiss (WFO). The latter has undergone granulite facies metamorphism and occurs throughout much of western Fiordland. WFO was emplaced synkinematically in a subduction-related magmatic arc. A collisional event during or immediately following magma emplacement resulted in crustal thickening equivalent to onloading of a 20 km thick section over rocks already buried at mid-crustal depths. This event was responsible for peak load pressures of c. 12-13 kbar. The steeply dipping Surprise Creek Fault juxtaposes high-pressure metamorphic rocks of western and central Fiordland against virtually unmetamorphosed gabbroic rocks of the Early Cretaceous Darran Complex. -from Author

  17. Illite/smectite diagenesis and hydrocarbon generation in Cretaceous Mowry and Skull Creek Shales of northern Rocky Mountains-Great Plains region

    SciTech Connect

    Burtner, R.L.; Warner, M.A.

    1983-03-01

    The Lower Cretaceous Mowry and Skull Creek Shales and their equivalents are among the major source rocks in the northern Rocky Mountains-Great Plains region. They are the major source of hydrocarbons in the Lower Cretaceous Muddy Sandstone of the Powder River basin. This sandstone has a geographic distribution similar to that of the Mowry and much of the Skull Creek. Illite/smectite mixed-layer clay in the Mowry and Skull Creek Shales of eastern Montana and western North Dakota is unaltered. No significant amounts of hydrocarbons have ever been found in the Muddy Sandstone of this area. Hydrocarbons in the Muddy Sandstone occur within or immediately adjacent to areas in which the smectite component of the illite/smectite in the Mowry and Skull Creek Shales has undergone alteration to illite during burial diagenesis. Anomalous decreases in the total organic carbon content of the Mowry and Skull Creek Shales lie within areas of illite/smectite alteration and coincide with the deeper parts of structural basins which developed after deposition of the Mowry and Skull Creek. These regional variations in illite/smectite alteration and total organic carbon content reflect thermal maturation and are not provenance controlled. They are useful indicators of areas where the potential source rocks have been subjected to temperatures adequate to generate hydrocarbons. The degree of illite/smectite diagenesis in the Mowry and Skull Creek of the northern Rocky Mountains-Great Plains region is thus of exploration significance in the search of hydrocarbons in this area.

  18. Assessment of Young Dong tributary and Imgok Creek impacted by Young Dong coal mine, South Korea.

    PubMed

    Lee, Byung-Tae; Ranville, James F; Wildeman, Thomas R; Jang, Min; Shim, Yon Sik; Ji, Won Hyun; Park, Hyun Sung; Lee, Hyun Ju

    2012-01-01

    An initial reclamation of the Young Dong coal mine site, located in northeastern South Korea, was completed in 1995. Despite the filling of the adit with limestone, acid rock drainage (ARD) enters Young Dong tributary and is then discharged to Imgok Creek. This ARD carries an average of 500 mg CaCO(3)/l of mineral acidity, primarily as Fe(II) and Al. Before spring runoff, the flow of Imgok Creek is 3.3-4 times greater than that of the tributary and has an alkalinity of 100 mg CaCO(3)/l, which is sufficient to eliminate the mineral acidity and raise the pH to about 6.5. From April through September 2008, there were at least two periods of high surface flow that affects the flow of ARD from the adit. Flow of ARD reaches 2.8 m(3)/min during spring runoff. This raised the concentrations of Fe and Al in the confluence with Imgok Creek. However, by 2 km downstream the pH of the Imgok Creek is 6.5 and only dissolved Fe is above the Korean drinking water criteria (0.30 mg/l). This suggests only a minor impact of Young Dong Creek water on Imgok Creek. Acid digestion of the sediments in Imgok Creek and Young Dong Tributary reveals considerable abundances of heavy metals, which could have a long-term impact on water quality. However, several water-based leaching tests, which better simulate the bioavailable metals pool, released only Al, Fe, Mn, and Zn at concentrations exceeding the criteria for drinking water or aquatic life. PMID:21818559

  19. Hydrological characterization of Birch Creek Basin

    SciTech Connect

    Koslow, K.N.

    1984-12-01

    A hydrological characterization of the Birch Creek Basin has been conducted to analyze the flood potential from Birch Creek on the Idaho National Engineering Laboratory (INEL). Birch Creek originated from springs below Gilmore Summit, between the Lemhi and Beaverhead Mountain Ranges, and flows in a southeasterly direction onto the Snake River Plain. The channel leads to a depression on the INEL site knows as the Birch Creek Playa. Birch Creek flows reach the playa only in years of high spring runoff. Test Area North (TAN) is located in this depressional area. This study provides a detailed description of the Birch Creek Basin including a flood-frequency analysis, PMF computation and local basin snowmelt analysis to determine the possible flood potential near TAN. 8 references, 6 figures, 6 tables.

  20. Love Garden AntelopeCreek

    E-print Network

    Farritor, Shane

    St. 12thSt. 13thSt. 14thSt. 20thSt. 16thSt. 17thSt. 18thSt. 19thSt. Vine St. 'Y' St. 'R' St. 'Q' St. 'P. I-80South 'S' St. Vine St. 14thSt. X STREET AntelopeValleyParkway Holdrege St. Salt Creek Roadway 'Y Hall Devaney Sports Center Track Office Bldg. Nebraska Champions Club Center Husker Hall Vine St

  1. Love Garden AntelopeCreek

    E-print Network

    Farritor, Shane

    St. 12thSt. 13thSt. 14thSt. 20thSt. 16thSt. 17thSt. 18thSt. 19thSt. Vine St. 'Y' St. 'R' St. 'Q' St. 'P. I-80South 'S' St. Vine St. 14thSt. X STREET AntelopeValleyParkway Holdrege St. Salt Creek Roadway 'Y Office Bldg. Nebraska Champions Club Center Husker Hall Vine St.Apts. Othmer Hall Temple Bldg. Alexander

  2. PINE CREEK ROADLESS AREA, OREGON.

    USGS Publications Warehouse

    Walker, George W.; Denton, David K., Jr.

    1984-01-01

    Examination of the Pine Creek Roadless Area, Oregon indicates that there is little likelihood for the occurrence of energy or metallic mineral resources in the area. No mines or mineral prospects were identified during the investigation. Although nearby parts of Harney Basin are characterized by higher than normal heat flow, indicating that the region as a whole may have some as yet undefined potential for the occurrence of the geothermal energy resources, no potential for this resource was identified in the roadless area.

  3. Rock Pioneers

    NSDL National Science Digital Library

    Lawrence Hall of Science

    1981-01-01

    In this outdoor activity/field trip, learners investigate organisms that live along the ocean's rocky coast. Learners add bare rocks to an intertidal zone, and over the course of 6-8 weeks observe what plant and animals colonize (come to live) on the new rocks. The intertidal zone, covered by water during high tides and uncovered at low tides, is usually densely covered with marine organisms such as seaweeds, mussels, barnacles, snails, limpets, anemones and sea stars. Learners may not only discover pioneer organisms (first colonizers) of their new rocks, but other organisms that replace the first arrivals in the process of succession. This activity calls for multiple, weekly return visits to the intertidal zone.

  4. Pyroclastic Rocks

    NASA Astrophysics Data System (ADS)

    Mahood, Gail A.

    Most of the advances in volcanology during the past 20 years have concerned the recognition, interpretation, and mode of emplacement of pyroclastic rocks. The literature on pyroclastic rocks is widely scattered, in part because the field draws from sedimentology, igneous petrology, physics, and fluid mechanics, and there have been few review papers on the topic. Fisher and Schmincke have done the discipline of volcanology and all field-oriented geologists a great service in assembling material from a wide range of sources in this comprehensive treatment of pyroclastic rocks. With its introduction to the petrology of magmas involved in explosive eruptions in chapter 2 and a complete treatment of magma rheology and the behavior of dissolved and exsolving magmatic volatiles in chapter 3, they lay sufficient groundwork that anyone with a rudimentary knowledge of geology can understand the book.

  5. 2. General perspective view of Neawanna Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. General perspective view of Neawanna Creek Bridge, view looking north, east side of structure - Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S. 101 (Oregon Coast Highway), Seaside, Clatsop County, OR

  6. 5. General perspective view of Neawanna Creek Bridge, showing articulated ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. General perspective view of Neawanna Creek Bridge, showing articulated fascia walls - Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S. 101 (Oregon Coast Highway), Seaside, Clatsop County, OR

  7. 4. General perspective view of Neawanna Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. General perspective view of Neawanna Creek Bridge, view looking northwest - Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S. 101 (Oregon Coast Highway), Seaside, Clatsop County, OR

  8. 3. General perspective view of Neawanna Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. General perspective view of Neawanna Creek Bridge, view looking north, west side of structure - Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S. 101 (Oregon Coast Highway), Seaside, Clatsop County, OR

  9. 1. Topographic view of Neawanna Creek Bridge, view looking northeast ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Topographic view of Neawanna Creek Bridge, view looking northeast - Neawanna Creek Bridge, Spanning Neawanna Creek at Milepoint 19.72 on U.S. 101 (Oregon Coast Highway), Seaside, Clatsop County, OR

  10. 59. Credit FM. Flood waters on South Battle Creek next ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    59. Credit FM. Flood waters on South Battle Creek next to powerhouse. Note height of water in relation to tailraces. - Battle Creek Hydroelectric System, Battle Creek & Tributaries, Red Bluff, Tehama County, CA

  11. 122. Credit JE. Millseat Creek above the intake of the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    122. Credit JE. Millseat Creek above the intake of the ditch leading to the Volta forebay. (JE, v. 12 1902 p. 233). - Battle Creek Hydroelectric System, Battle Creek & Tributaries, Red Bluff, Tehama County, CA

  12. 77 FR 10960 - Drawbridge Operation Regulation; Snake Creek, Islamorada, FL

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-24

    ...USCG-2012-0047] Drawbridge Operation Regulation; Snake Creek, Islamorada, FL AGENCY: Coast Guard...from the regulation governing the operation of Snake Creek Bridge, mile 0.5, across Snake Creek, in Islamorada, Florida. The...

  13. Topographic view of the Spring Creek Bridge and Collier State ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Topographic view of the Spring Creek Bridge and Collier State Park, view looking east. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  14. Approach view of the Spring Creek Bridge, view looking north. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Approach view of the Spring Creek Bridge, view looking north. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  15. General perspective view of the Spring Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Spring Creek Bridge, view looking northwest. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  16. Approach view of the Spring Creek Bridge, view looking south. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Approach view of the Spring Creek Bridge, view looking south. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  17. Elevation view of the Spring Creek Bridge, view looking east. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Elevation view of the Spring Creek Bridge, view looking east. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  18. General perspective view of the Spring Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Spring Creek Bridge, view looking east. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  19. General perspective view of the Spring Creek Bridge, view looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    General perspective view of the Spring Creek Bridge, view looking southeast. - Spring Creek Bridge, Spanning Spring Creek at Milepoint 253.98 on Oregon to California Highway (US Route 97), Chiloquin, Klamath County, OR

  20. 2. Salmon Creek Diversion Dam, overview, diversion weir center foreground, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Salmon Creek Diversion Dam, overview, diversion weir center foreground, headworks overflow weir to center left, view to east - Salmon Creek Diversion Dam, Salmon Creek, Okanogan, Okanogan County, WA

  1. 1. Salmon Creek Diversion Dam, weir (to left), sand and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Salmon Creek Diversion Dam, weir (to left), sand and silt sluice gate (center), main canal headworks (to right), view to northwest - Salmon Creek Diversion Dam, Salmon Creek, Okanogan, Okanogan County, WA

  2. 2. Big Creek Road, worm fence and road at trailhead. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Big Creek Road, worm fence and road at trailhead. - Great Smoky Mountains National Park Roads & Bridges, Big Creek Road, Between State Route 284 & Big Creek Campground, Gatlinburg, Sevier County, TN

  3. 75 FR 43915 - Basin Electric Power Cooperative: Deer Creek Station

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-27

    ...Service Basin Electric Power Cooperative: Deer Creek Station AGENCY: Rural Utilities...Impact Statement (EIS) for the proposed Deer Creek Station Energy Facility project...construct, own, operate, and maintain the Deer Creek Station Energy Facility, a 300...

  4. 75 FR 33238 - Basin Electric Power Cooperative: Deer Creek Station

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-11

    ...Service Basin Electric Power Cooperative: Deer Creek Station AGENCY: Rural Utilities...Impact Statement (EIS) for the proposed Deer Creek Station project in Brookings and...construct the proposed 300 megawatt (MW) Deer Creek Station in Brookings and Deuel...

  5. 8. DETAIL VIEW OF DATEPLATE WHICH READS 'HARP CREEK, LUTEN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. DETAIL VIEW OF DATEPLATE WHICH READS 'HARP CREEK, LUTEN BRIDGE CO., CONTRACTOR, ARKANSAS STATE HIGHWAY DEPARTMENT, 1928' - Harp Creek Bridge, Spans Harp Creek at State Highway 7, Harrison, Boone County, AR

  6. The geochemical record in rock glaciers

    USGS Publications Warehouse

    Steig, E.J.; Fitzpatrick, J.J.; Potter, N., Jr.; Clark, D.H.

    1998-01-01

    A 9.5 m ice core was extracted from beneath the surficial debris cover of a rock glacier at Galena Creek, northwestern Wyoming. The core contains clean, bubble-rich ice with silty debris layers spaced at roughly 20 cm intervals. The debris layers are similar in appearance to those in typical alpine glaciers, reflecting concentration of debris by melting at the surface during the summer ablation season. Profiles of stable isotope concentrations and electrical conductivity measurements provide independent evidence for melting in association with debris layers. These observations are consistent with a glacial origin for the ice, substantiating the glacigenic model for rock glacier formation. The deuterium excess profile in the ice indicates that the total depth of meltwater infiltration is less than the thickness of one annual layer, suggesting that isotope values and other geochemical signatures are preserved at annual resolution. This finding demonstrates the potential for obtaining useful paleoclimate information from rock glacier ice.

  7. NAME: Salt Creek Estuary Restoration LOCATION: Salt Creek Watershed, Clallam County, Washington

    E-print Network

    US Army Corps of Engineers

    NAME: Salt Creek Estuary Restoration LOCATION: Salt Creek Watershed, Clallam County, Washington Federal funds $0 PROJECT DESCRIPTION: The Salt Creek Estuary Reconnection project will significantly enhance tidal and fluvial hydrology to 22.5 acres of salt marsh, which will return the salt marsh to its

  8. DEEP CREEK AND MUD CREEK, TWIN FALLS, IDAHO. WATER QUALITY STATUS REPORT, 1986

    EPA Science Inventory

    Deep Creek and Mud Creek are located in Twin Falls County near Buhl, Idaho (17040212). From April through October, these creeks convey irrigation drainage water from the western part of the Twin Falls irrigation tract to the Snake River. During 1986, water quality surveys were ...

  9. LIGHTNING CREEK, PACK RIVER, AND SAND CREEK, BONNER COUNTY, IDAHO - WATER QUALITY SUMMARY, 1978

    EPA Science Inventory

    In Water Year 1978, water quality studies were conducted on Lightning Creek, Pack River, and Sand Creek in Bonner County, Idaho (17010214, 17010213) to determine the present status of the streams. Water quality in Lightning Creek was generally very high. No violations of standa...

  10. Assess Current and Potential Salmonid Production in Rattlesnake Creek Associated with Restoration Efforts; Yakama Indian Nation, Annual Report 2002-2003.

    SciTech Connect

    Morris, Gregory

    2003-05-01

    This document represents the FY2002 BPA contract Statement of Work for the Yakama Nation (YN) portion of the project entitled 'Assessment of current and potential salmonid production in Rattlesnake Creek associated with restoration efforts'. The purpose of the project is to complete detailed surveys of water quality, fish populations, habitat conditions and riparian health in the Rattlesnake Creek sub-basin of the White Salmon River in south central Washington. Results of the surveys will be used to establish Rattlesnake Creek sub-basin baseline environmental factors prior to anticipated removal of Condit Dam in 2006 and enable cost-effective formulation of future watershed restoration strategies.

  11. Start a Rock Collection

    NSDL National Science Digital Library

    American Museum of Natural History

    2012-06-26

    Learners follow a three-step process to start their own rock collection. Learners will collect rocks, record information about each rock on a Rock Chart, observe and sort their rocks, and create a rock display. This activity also includes a book list with resources for rock classification.

  12. Success of Instream Habitat Structures After a 50Year Flood in Gold Creek, Montana

    Microsoft Academic Search

    David A. Schmetterling; Ronald W. Pierce

    1999-01-01

    Gold Creek, in western Montana, lost complexity and diversity of fish habitat following riparian logging ac- tivities, removal of instream wood, and subsequent scouring. In the 4.8-km study area, the stream was al- most totally void of large woody debris (4.2 pieces\\/ km) and associated pools (1.3 pools\\/km). We con- structed 66 structures made of natural materials (rock and wood)

  13. Age of Neoproterozoic Bilatarian Body and Trace Fossils, White

    E-print Network

    Age of Neoproterozoic Bilatarian Body and Trace Fossils, White Sea, Russia: Implications-bearing, shallow marine siliciclastic rocks in the Zimnie Gory section of the White Sea region indicates the Flinders Ranges (10, 21) in South Australia and White Sea coast in Russia (22), which account for 60

  14. Hydrology of upper Black Earth Creek basin, Wisconsin

    USGS Publications Warehouse

    Cline, Denzel R.; Busby, Mark W.

    1963-01-01

    The upper Black Earth Creek drainage basin has an area of 46 square miles and is in Dane County in south-central Wisconsin. The oldest rock exposed in the valley walls is the sandstone of Late Cambrian age. Dolomite of the Prairie du Chien Group of Ordovician age overlies the sandstone and forms the. resistant cap on the hills. The St. Peter Sandstone, Platteville and Decorah Formations, and Galena Dolomite, all Ordovician in age, form a narrow belt along the southern boundary of the area. Outwash and alluvium of Pleistocene and Recent age fill the valleys. The eastern half of the area was glaciated and is covered with till. The sandstone of Late Cambrian age and the sand and gravel of the outwash deposits are hydraulically connected. Ground water occurs under unconfined (water-table) conditions in the western unglaciated part of the basin and under artesian conditions beneath the till locally in the eastern part. The source of most of the ground water is direct infiltration of precipitation; however, some ground water enters the area as underflow from the south. About 7 inches of the 30 inches of average annual precipitation recharges the ground-water reservoir. The ground water generally moves toward Black Earth Creek where it is discharged. Some ground water moves out of the basin as underflow beneath the valley of Black Earth Creek, and some is discharged by evapotranspiration or is withdrawn by pumping from wells. Water levels in shallow nonartesian wells respond rapidly to precipitation. The effect of precipitation on water levels in artesian wells is slower and more subdued. Water levels are generally highest in spring and lowest in fall and winter. The flow of upper Black Earth Creek is derived mostly from ground-water discharge, except during short periods of and immediately after precipitation when most of the flow is derived from surface runoff. The runoff from upper Black Earth Creek basin decreased from an average of 8.72 inches per square mile of drainage area in 1955 to 5.55 inches in 1958; the decrease reflects the generally decreasing precipitation and declining water levels in the basin during that period. On July 10, 1958, the discharge from the basin was 0.367 cubic feet per second per square mile, and the greatest discharge was 0.84 cubic feet per second per square mile from the southwest subbasin. The ground water has an average temperature of about 50?F. It is a calcium magnesium bicarbonate type water and is very hard.

  15. Igneous Rocks

    Microsoft Academic Search

    Bruce R. Doe

    1983-01-01

    ``Igneous Rocks was written for undergraduate geology majors who have had a year of college-level chemistry and a course in mineralogy ... and for beginning graduate students. Geologists working in industry, government, or academia should find this text useful as a guide to the technical literature up to 1981 and as an overview of topics with which they have not

  16. Rock Groups

    NSDL National Science Digital Library

    Steven Strogatz

    2010-02-07

    In this one-page article Steven Strogatz explains how representing numbers with concrete objects can make calculations less confusing. By using images of rocks, he demystifies concepts such as square numbers, parity, primes, and sums of consecutive numbers. This is the second in Steven's series of 15 articles on the Elements of Math (home page cataloged separately).

  17. Red Rocks

    Microsoft Academic Search

    Tom Grillo; John Sipple; Ethan Weitzman

    2010-01-01

    This film explores the background and issues surrounding Senate bill 799 - A bill to designate as wilderness certain Federal portions of the red rock canyons of the Colorado Plateau and the Great Basin Deserts in the State of Utah for the benefit of present and future generations of people in the United States.

  18. Research Rocks

    USGS Multimedia Gallery

    Dr. Alex Andronikov, a geologist from the University of Michigan Department of Geological Science, and Kelley Brumley, a geologist from Stanford University, sort through rocks that were dredged from the Arctic Ocean floor Sept. 9, 2009, aboard the Coast Guard Cutter Healy.The dredging is part of the...

  19. Geochemical Investigation of Source Water to Cave Springs, Great Basin National Park, White Pine County, Nevada

    USGS Publications Warehouse

    Prudic, David E.; Glancy, Patrick A.

    2009-01-01

    Cave Springs supply the water for the Lehman Caves Visitor Center at Great Basin National Park, which is about 60 miles east of Ely, Nevada, in White Pine County. The source of water to the springs was investigated to evaluate the potential depletion caused by ground-water pumping in areas east of the park and to consider means to protect the supply from contamination. Cave Springs are a collection of several small springs that discharge from alluvial and glacial deposits near the contact between quartzite and granite. Four of the largest springs are diverted into a water-collection system for the park. Water from Cave Springs had more dissolved strontium, calcium, and bicarbonate, and a heavier value of carbon-13 than water from Marmot Spring at the contact between quartzite and granite near Baker Creek campground indicating that limestone had dissolved into water at Cave Springs prior to discharging. The source of the limestone at Cave Springs was determined to be rounded gravels from a pit near Baker, Nevada, which was placed around the springs during the reconstruction of the water-collection system in 1996. Isotopic compositions of water at Cave Springs and Marmot Spring indicate that the source of water to these springs primarily is from winter precipitation. Mixing of water at Cave Springs between alluvial and glacial deposits along Lehman Creek and water from quartzite is unlikely because deuterium and oxygen-18 values from a spring discharging from the alluvial and glacial deposits near upper Lehman Creek campground were heavier than the deuterium and oxygen-18 values from Cave Springs. Additionally, the estimated mean age of water determined from chlorofluorocarbon concentrations indicates water discharging from the spring near upper Lehman Creek campground is younger than that discharging from either Cave Springs or Marmot Spring. The source of water at Cave Springs is from quartzite and water discharges from the springs on the upstream side of the contact between quartzite and granite where the alluvial and glacial deposits are thin. Consequently, the potential for depletion of discharge at Cave Springs from ground-water pumping in Snake Valley east of the park is less than if the source of water was from alluvial and glacial deposits or carbonate rocks, which would be more directly connected to downstream pumping sites in Snake Valley.

  20. Q00906010024 rock check dam

    E-print Network

    00906010024 rock check dam Q00906010025 rock check dam Q00906010021 rock check dam Q00906010022 rock check dam Q00906010027 rock check dam Q00906010026 rock check dam Q00906010018 rock check dam Q00906010023 rock check dam Q00906010011 rock check dam Q00906010008 rock check dam Q00906010007 rock check dam Q

  1. External Resource: Rock and Roll

    NSDL National Science Digital Library

    1900-01-01

    This page contains information on exactly what a rock is, as well as a diagram of the rock cycle. Topics include: characteristics of rocks, types of rocks, igneous rocks, metamorphic rocks, and sedimentary rocks.

  2. The Crayon Rock Cycle

    NSDL National Science Digital Library

    Eric Muller

    2004-01-01

    In this activity, learners use crayons to draw conclusions about rocks and the rock cycle. Learners form crayons ((which can be "weathered"—heated, compressed and cooled—like rocks) into models of sedimentary, metamorphic, and igneous rocks.

  3. Rock Cycle Animation

    NSDL National Science Digital Library

    2010-01-01

    Use this interactive rock cycle animation to help you with your schoolwork! This cutaway view of Earth shows where some common rock-forming processes occur. Embedded animations will illustrate the path of a rock moving through the rock cycle.

  4. 33 CFR 117.741 - Raccoon Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Navigable Waters 1 2013-07-01 2013-07-01 false Raccoon Creek. 117.741 Section 117.741 Navigation and Navigable...REGULATIONS Specific Requirements New Jersey § 117.741 Raccoon Creek. (a) The draw of the Route 130 highway...

  5. 33 CFR 117.741 - Raccoon Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Navigable Waters 1 2010-07-01 2010-07-01 false Raccoon Creek. 117.741 Section 117.741 Navigation and Navigable...REGULATIONS Specific Requirements New Jersey § 117.741 Raccoon Creek. (a) The draw of the Route 130 highway...

  6. 33 CFR 117.741 - Raccoon Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Navigable Waters 1 2012-07-01 2012-07-01 false Raccoon Creek. 117.741 Section 117.741 Navigation and Navigable...REGULATIONS Specific Requirements New Jersey § 117.741 Raccoon Creek. (a) The draw of the Route 130 highway...

  7. 33 CFR 117.741 - Raccoon Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Navigable Waters 1 2011-07-01 2011-07-01 false Raccoon Creek. 117.741 Section 117.741 Navigation and Navigable...REGULATIONS Specific Requirements New Jersey § 117.741 Raccoon Creek. (a) The draw of the Route 130 highway...

  8. 33 CFR 117.741 - Raccoon Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Navigable Waters 1 2014-07-01 2014-07-01 false Raccoon Creek. 117.741 Section 117.741 Navigation and Navigable...REGULATIONS Specific Requirements New Jersey § 117.741 Raccoon Creek. (a) The draw of the Route 130 highway...

  9. The Patroon Creek Contamination Migration Investigation

    Microsoft Academic Search

    K. Dufek; A. Zafran; J. T. Moore

    2006-01-01

    Shaw performed a Site Investigation (SI) for sediment within the Unnamed Tributary of the Patroon Creek, a section of the Patroon Creek, and the Three Mile Reservoir as part of the overall contract with the United States Army Corps of Engineers (USACE) to remediate the Colonie Formerly Utilized Sites Remedial Action Program (FUSRAP) Site. The Unnamed Tributary formerly flowed through

  10. 33 CFR 117.324 - Rice Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Navigable Waters 1 2010-07-01 2010-07-01 false Rice Creek. 117.324 Section 117.324 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.324 Rice Creek. The CSX Railroad Swingbridge, mile 0.8,...

  11. 33 CFR 117.324 - Rice Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Navigable Waters 1 2011-07-01 2011-07-01 false Rice Creek. 117.324 Section 117.324 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.324 Rice Creek. The CSX Railroad Swingbridge, mile 0.8,...

  12. 33 CFR 117.324 - Rice Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Navigable Waters 1 2012-07-01 2012-07-01 false Rice Creek. 117.324 Section 117.324 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.324 Rice Creek. The CSX Railroad Swingbridge, mile 0.8,...

  13. 33 CFR 117.324 - Rice Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Navigable Waters 1 2014-07-01 2014-07-01 false Rice Creek. 117.324 Section 117.324 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.324 Rice Creek. The CSX Railroad Swingbridge, mile 0.8,...

  14. 33 CFR 117.324 - Rice Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Navigable Waters 1 2013-07-01 2013-07-01 false Rice Creek. 117.324 Section 117.324 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.324 Rice Creek. The CSX Railroad Swingbridge, mile 0.8,...

  15. 33 CFR 117.571 - Spa Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Navigable Waters 1 2010-07-01 2010-07-01 false Spa Creek. 117.571 Section 117.571 Navigation and Navigable...REGULATIONS Specific Requirements Maryland § 117.571 Spa Creek. The S181 bridge, mile 4.0, at Annapolis,...

  16. Pine Creek Ranch; Annual Report 2002.

    SciTech Connect

    Berry, Mark E.

    2003-02-01

    This report gives information about the following four objectives: OBJECTIVE 1--Gather scientific baseline information for monitoring purposes and to assist in the development of management plans for Pine Creek Ranch; OBJECTIVE 2--Complete and implement management plans; OBJECTIVE 3--Protect, manage and enhance the assets and resources of Pine Creek Ranch; and OBJECTIVE 4--Deliverables.

  17. SALMON RESEARCH AT DEER CREEK, CALIF.

    E-print Network

    SALMON RESEARCH AT DEER CREEK, CALIF. Marine Biological Laboratory L I B rt ja. R Y FEB 2 7 1952 FISN AND WILDLIFE SERVICE #12;#12;SALMON RESEARCH AT DEER CREEK, CALIF. Marine Biological Laboratory. January, 19^2 #12;?4 4t ^^'^^^'^''C^^Jtr^ShQsfa Lake SHASTA DAM KESWICK DAM UPPER SACRAMENTO AREA AND DEER

  18. 33 CFR 117.543 - Bear Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Navigable Waters 1 2010-07-01 2010-07-01 false Bear Creek. 117.543 Section 117.543 Navigation and Navigable...REGULATIONS Specific Requirements Maryland § 117.543 Bear Creek. (a) The draws of the Baltimore County...

  19. 33 CFR 117.543 - Bear Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Navigable Waters 1 2011-07-01 2011-07-01 false Bear Creek. 117.543 Section 117.543 Navigation and Navigable...REGULATIONS Specific Requirements Maryland § 117.543 Bear Creek. (a) The draws of the Baltimore County...

  20. Big Canyon Creek Ecological Restoration Strategy

    Microsoft Academic Search

    Lynn Rasmussen; Shannon Richardson

    2007-01-01

    He-yey, Nez Perce for steelhead or rainbow trout (Oncorhynchus mykiss), are a culturally and ecologically significant resource within the Big Canyon Creek watershed; they are also part of the federally listed Snake River Basin Steelhead DPS. The majority of the Big Canyon Creek drainage is considered critical habitat for that DPS as well as for the federally listed Snake River

  1. 33 CFR 117.335 - Taylor Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Navigable Waters 1 2010-07-01 2010-07-01 false Taylor Creek. 117.335 Section 117.335 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.335 Taylor Creek. The draw of US441 bridge, mile 0.3 at...

  2. 33 CFR 117.335 - Taylor Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Navigable Waters 1 2011-07-01 2011-07-01 false Taylor Creek. 117.335 Section 117.335 Navigation and Navigable...REGULATIONS Specific Requirements Florida § 117.335 Taylor Creek. The draw of US441 bridge, mile 0.3 at...

  3. 33 CFR 117.917 - Battery Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Navigable Waters 1 2014-07-01 2014-07-01 false Battery Creek. 117.917 Section 117.917 Navigation and Navigable...REGULATIONS Specific Requirements South Carolina § 117.917 Battery Creek. The draw of the State highway bridge, mile...

  4. 33 CFR 117.917 - Battery Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Navigable Waters 1 2013-07-01 2013-07-01 false Battery Creek. 117.917 Section 117.917 Navigation and Navigable...REGULATIONS Specific Requirements South Carolina § 117.917 Battery Creek. The draw of the State highway bridge, mile...

  5. 33 CFR 117.917 - Battery Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Navigable Waters 1 2012-07-01 2012-07-01 false Battery Creek. 117.917 Section 117.917 Navigation and Navigable...REGULATIONS Specific Requirements South Carolina § 117.917 Battery Creek. The draw of the State highway bridge, mile...

  6. Poohbear Rock

    NASA Technical Reports Server (NTRS)

    1997-01-01

    This image, taken by Sojourner's front right camera, was taken when the rover was next to Poohbear (rock at left) and Piglet (not seen) as it looked out toward Mermaid Dune. The textures differ from the foreground soil containing a sorted mix of small rocks, fines and clods, from the area a bit ahead of the rover where the surface is covered with a bright drift material. Soil experiments where the rover wheels dug in the soil revealed that the cloudy material exists underneath the drift.

    Mars Pathfinder is the second in NASA's Discovery program of low-cost spacecraft with highly focused science goals. The Jet Propulsion Laboratory, Pasadena, CA, developed and manages the Mars Pathfinder mission for NASA's Office of Space Science, Washington, D.C. JPL is a division of the California Institute of Technology (Caltech).

  7. Meridiani Rocks

    NASA Technical Reports Server (NTRS)

    2005-01-01

    16 September 2005 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows the complex surfaces of some of the light- and intermediate-toned sedimentary rock exposed by erosion in eastern Sinus Meridiani. Similar rocks occur at the Mars Exploration Rover, Opportunity, site, but they are largely covered by windblown sand and granules. The dark feature with a rayed pattern is the product of a meteor impact.

    Location near: 0.8oN, 355.2oW Image width: width: 3 km (1.9 mi) Illumination from: lower left Season: Northern Autumn

  8. SANDY CREEK ROADLESS AREA, MISSISSIPPI.

    USGS Publications Warehouse

    Haley, Boyd R.; Bitar, Richard F.

    1984-01-01

    The Sandy Creek Roadless Area includes about 3. 7 sq mi in the southeastern part of Adams County, Mississippi. On the basis of a mineral survey, the area offers little promise for the occurrence of metallic mineral resources but has a probable resource potential for oil and natural gas. It is possible that wells drilled deep enough to penetrate the older reservoirs will encounter significant quantities of oil and natural gas in the roadless area. The deposits of gravel, sand, and clay present in the area could be utilized in the construction industry, but similar deposits elsewhere are much closer to available markets.

  9. Should We Dam Nanticoke Creek?

    NSDL National Science Digital Library

    Philip Childs

    In this decision-making exercise, students investigate what would occur if a dam were built along Nanticoke Creek, a real stream just north of West Corners near the Village of Endicott, New York. They will use topographic maps to determine how much area would be flooded by the new reservoir, to study river drainages, and to consider the impacts of dams on a region. They must also consider rivers in the context of their relation to humankind. The exercise can be extended to other, more local locations having similar topography.

  10. Welcome to Rock Day

    NSDL National Science Digital Library

    Jeaneen Benhart

    2004-01-01

    Seeking to revitalize a unit on rocks, sand, and soil for first-graders, the authors created new hands-on lessons. These included testing the hardness of rocks, making models of the Earth, and sorting rocks. As a culminating activity, students participated in a series of Rock Day events that focused on the three different types of rocks and the rock cycle.

  11. Water resources of the Sycamore Creek watershed, Maricopa County, Arizona

    USGS Publications Warehouse

    Thomsen, B.W.; Schumann, Herbert H.

    1969-01-01

    The Sycamore Creek watershed is representative of many small watersheds in the Southwest where much of the streamflow originates in the mountainous areas and disappears rather quickly into the alluvial deposits adjacent to the mountains. Five years of .streamflow records from the Sycamore Creek watershed show that an average annual water yield of 6,110 acre-feet was obtained from the 165 square miles (105,000 acres) of the upper hard-rock mountain area, which receives an average annual precipitation of about 20 inches. Only a small percentage of the ,annual water yield, however, reaches the Verde River as surface flow over the 9-mile reach of the alluvial channel below the mountain front. Flows must be more ,than 200 cubic feet per second to reach the river; flows less than this rate disappear into the 1,ower alluvial area and are stored temporarily in the ground-Water reservoir : most of this water is released as ground-water discharge to the Verde River at a relatively constant rate of about 4,000 acre-feet per year. Evapotranspiration losses in the lower alluvial area are controlled by the depth of the water table and averaged about 1,500 acre-feet per year.

  12. Rock cycle in chocolate lab

    NSDL National Science Digital Library

    Pete Stelling

    In this lab students receive two small blocks (1 cm3) of chocolate (white and dark), and follow it through the entire rock cycle. The chocolate blocks are melted on a hot plate, with different melting temperatures and rheologies due to compositional differences. The "magma" is then cooled either slowly or quickly, and the resulting textures are examined and compared to granite and basalt hand samples. The "igneous" chocolate is then ground and abraded to show erosion, and the eroded material is pressure-lithified to form "sedimentary" chocolate. The sedimentary chocolate then undergoes greater pressure to mimic metamorphism, and additional heat re-melts the chocolate back into magma. Students compare the chocolate "rocks" in each of these stages with real rock samples. The final assignment is to describe the "life story" of complex conglomerate rock sample. The lab is a bit messy and takes a bit of preparation, but students come away with a significantly better understanding of the rock cycle as a whole and each of its component parts.

  13. 2. CONTEMPORARY PHOTOGRAPH OF BIG CREEK POWERHOUSE NO. 3 TAKEN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. CONTEMPORARY PHOTOGRAPH OF BIG CREEK POWERHOUSE NO. 3 TAKEN FROM SAME ANGLE AS CA-167-X-1. THREE ORIGINAL PENSTOCKS PLUS FOURTH AND FIFTH PENSTOCKS (VISIBLE TO LEFT OF ORIGINAL THREE), AND THREE ORIGINAL STANDPIPES COUPLED TO FOURTH STANDPIPE SHOWN BEHIND AND ABOVE POWERHOUSE BUILDING. VIEW TO NORTHEAST. - Big Creek Hydroelectric System, Powerhouse 3 Penstock Standpipes, Big Creek, Big Creek, Fresno County, CA

  14. Omesh Syal of Dawson Creek PEACE & LIARD 2009

    E-print Network

    Northern British Columbia, University of

    Omesh Syal of Dawson Creek PEACE & LIARD 2009 Fort St. John Melissa Asai BComm Accounting Erin of Dawson Creek Dawson Creek Julie Alexander BSc Biochemistry and Molecular Biology Brody Fraser BComm of Fort St. John Tamara Shipton of Fort St. JohnShamir Mangalji of Dawson Creek UNBC Scholars First

  15. 23. VIEW SHOWING HIGH WATER IN ROWDY CREEK WITH COLLAPSED ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. VIEW SHOWING HIGH WATER IN ROWDY CREEK WITH COLLAPSED SECTION IN CREEK, LOOKING NORTH TO SOUTH FROM END OF UNCOLLAPSED SECTION Winter 1931-32 - Rowdy Creek Bridge, Spanning Rowdy Creek at Fred Haight Drive, Smith River, Del Norte County, CA

  16. All About Rocks

    NSDL National Science Digital Library

    Laura Heffernan

    2010-06-21

    We will be learning about different types of rocks today.This project will teach you how to sort rocks based upon color, hardness, texture, layering, and particle size. We will even see a video of new rocks being formed! Visit this link to read an intro about rocks. Intro to Rocks Then visit these three links 1) Metamorphic Rocks 2) Igneous Rocks 3) Sedimentary Rocks Now answer these questions: 1) What types of rocks do you think you would find in your backyard? 2)Compare and contrast 2 of the 3 different types of rocks. 3)What is your favorite ...

  17. Flood discharges and hydraulics near the mouths of Wolf Creek, Craig Branch, Manns Creek, Dunloup Creek, and Mill Creek in the New River Gorge National River, West Virginia

    USGS Publications Warehouse

    Wiley, J.B.

    1994-01-01

    The U.S. Geological Survey, in cooperation with the National Park Service, studied the frequency and magnitude of flooding near the mouths of five tributaries to the New River in the New River Gorge National River. The 100-year peak discharge at each tributary was determined from regional frequency equations. The 100-year discharge at Wolf Creek, Craig Branch, Manns Creek, Dunloup Creek, and Mill Creek was 3,400 cubic feet per second, 640 cubic feet per second, 8,200 cubic feet per second, 7,100 cubic feet per second, and 9,400 cubic feet per second, respectively. Flood elevations for each tributary were determined by application of a steady-state, one-dimensional flow model. Manning's roughness coefficients for the stream channels ranged from 0.040 to 0.100. Bridges that would be unable to contain the 100-year flood within the bridge opening included: the State Highway 82 bridge on Wolf Creek, the second Fayette County Highway 25 bridge upstream from the confluence with New River on Dunloup Creek, and an abandoned log bridge on Mill Creek.

  18. California Rocks!

    NSDL National Science Digital Library

    Mary Leech

    These course materials are for a basic college course in geology. Included are a course syllabus, websites of interest, the course project guidelines, and two field trip guides. Students can download a copy of the Periodic Table of the Elements and the Geologic Time Scale (detailed or simplified version). The main feature of the site is a series of slide shows for ten lectures covering basic geology with a focus on California. In addition there are lists of California's common rocks and minerals with photographs of each.

  19. Sedimentary Rocks

    NASA Technical Reports Server (NTRS)

    2005-01-01

    6 November 2005 This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows outcrops of sedimentary rocks in a crater located just north of the Sinus Meridiani region. Perhaps the crater was once the site of a martian lake.

    Location near: 2.9oN, 359.0oW Image width: width: 3 km (1.9 mi) Illumination from: lower left Season: Northern Autumn

  20. 78 FR 5798 - Grouse Creek Wind Park, LLC, Grouse Creek Wind Park II, LLC; Notice of Petition for Enforcement

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-28

    ...QF11-32-001, QF11-33-001] Grouse Creek Wind Park, LLC, Grouse Creek Wind Park II, LLC; Notice of Petition for Enforcement Take...Regulatory Policies Act of 1978 (PURPA), Grouse Creek Wind Park, LLC and Grouse Creek Wind Park II, LLC...

  1. White Toenails

    MedlinePLUS

    ... body, causing protein to be deposited within the nail bed. A fungal infection that affects the outermost layer of the toenail may cause a bright white discoloration of the toenail. A white area close to the nail fold (the lunula) varies in size from one ...

  2. 33 CFR 334.480 - Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot, Parris Island...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot...Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot...zone on Archers Creek (between the Broad River and Beaufort River), Ribbon Creek,...

  3. 33 CFR 334.480 - Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot, Parris Island...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot...Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot...zone on Archers Creek (between the Broad River and Beaufort River), Ribbon Creek,...

  4. 33 CFR 334.480 - Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot, Parris Island...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot...Archers Creek, Ribbon Creek, and Broad River; U.S. Marine Corps Recruit Depot...zone on Archers Creek (between the Broad River and Beaufort River), Ribbon Creek,...

  5. Steel Creek wildlife: L-Lake/Steel Creek Biological Monitoring Program, January 1986--December 1987

    SciTech Connect

    Giffin, M.A.; Patterson, K.K.

    1988-03-01

    Reptile and amphibian populations in Steel Creek below L-Lake were assessed in monthly or quarterly sampling programs. Thirty-eight species of reptiles or amphibians were collected during 1987 in the Steel Creek corridor below the L-Lake impoundment, and in the delta and channel. Juvenile turtles and alligators, and larval amphibians were observed or collected during the study, indicating continued reproduction in Steel Creek. The reptile and amphibian populations in Steel Creek show no indication of any effect due to the impoundment of the lake or the operation of L-Reactor. Waterfowl and associated birds in Steel Creek below L-Lake were observed, in conjunction with other sampling programs, during winter--spring and fall--winter migrations. Nine species of waterfowl and five species of associated birds were observed in 1987 in the Steel Creek corridor below the L-Lake impoundment and in the delta and channel.

  6. Flood of August 27-28, 1977, West Cache Creek and Blue Beaver Creek, southwestern Oklahoma

    USGS Publications Warehouse

    Corley, Robert K.; Huntzinger, Thomas L.

    1979-01-01

    This report documents a major storm which occurred August 27-28, 1977, in southwest Oklahoma near the communities of Cache and Faxon, OK. Blue Beaver Creek and West Cache Creek and their tributaries experienced extensive flooding that caused an estimated $1 million in damages. Reported rainfall amounts of 8 to 12 inches in 6 hours indicate the storm had a frequency in excess of the 100-year rainfall. Peak discharges on Blue Beaver Creek near Cache and West Cache Creek near Faxon were 13,500 cubic feet per second and 45,700 cubic feet per second respectively. The estimated flood frequency was in excess of 100 years on Blue Beaver Creek and in excess of 50 years on West Cache Creek. Unit runoff on small basins were in excess of 2000 cubic feet per second per square mile. Surveyed highwater marks were used to map the flooded area. (USGS)

  7. The Tallahala Creek Complex, Smith County, Mississippi: The crest is not always the best

    SciTech Connect

    Sticker, E.E. [Mississippi Office of Geology, Jackson, MS (United States)

    1994-09-01

    The Tallahala Creek complex, comprising both Tallahala Creek and East Tallahala Creek fields, is a salt-induced anticline transacted by two down-to-the-north fault systems. Since 1967, the upper portion of the Jurassic Smackover Formation has yielded almost 15 million bbl of oil and 20 billion ft{sup 3} of gas, or 75% and 64% of the total oil and gas, respectively, produced from the fields. Contemporaneous sediment accumulation and structural growth have created various lithofacies in the upper Smackover, thereby significantly affecting reservoir heterogeneity. These lithofacies can be delineated by their structural position on the anticline. On the most downdip and downthrown portions of the structure, the Lipper Smackover consists of a series of gray, fine to medium-grained sandstones separated by limestones. These sandstones generally exhibit both high porosity and permeability, and have thus contributed over 95% of the total Smackover production. Updip the upper Smackover becomes increasingly calcareous, finally grading into a sandy, occasionally dolomitic, limestone on the crest and southern upthrown flank of the anticline. This limestone lithofacies has been noncommercial as a reservoir rock, as evidenced by the less than 7000 bbl of oil cumulatively produced from the Smackover in two of the structurally highest wells, the Shell 2 E. M. Lane and the Shell 1 F. James. Structural and stratigraphic relationships discovered through field development of the Tallahala Creek complex have significantly altered the conventional idea that {open_quotes}the crest is always the best.{close_quotes}

  8. Panther Creek, Idaho, Habitat Rehabilitation, Final Report.

    SciTech Connect

    Reiser, Dudley W.

    1986-01-01

    The purpose of the project was to achieve full chinook salmon and steelhead trout production in the Panther Creek, Idaho, basin. Plans were developed to eliminate the sources of toxic effluent entering Panther Creek. Operation of a cobalt-copper mine since the 1930's has resulted in acid, metal-bearing drainage entering the watershed from underground workings and tailings piles. The report discusses plans for eliminating and/or treating the effluent to rehabilitate the water quality of Panther Creek and allow the reestablishment of salmon and trout spawning runs. (ACR)

  9. Rock Driller

    NASA Technical Reports Server (NTRS)

    Peterson, Thomas M.

    2001-01-01

    The next series of planetary exploration missions require a method of extracting rock and soil core samples. Therefore a prototype ultrasonic core driller (UTCD) was developed to meet the constraints of Small Bodies Exploration and Mars Sample Return Missions. The constraints in the design are size, weight, power, and axial loading. The ultrasonic transducer requires a relatively low axial load, which is one of the reasons this technology was chosen. The ultrasonic generator breadboard section can be contained within the 5x5x3 limits and weighs less than two pounds. Based on results attained the objectives for the first phase were achieved. A number of transducer probes were made and tested. One version only drills, and the other will actually provide a small core from a rock. Because of a more efficient transducer/probe, it will run at very low power (less than 5 Watts) and still drill/core. The prototype generator was built to allow for variation of all the performance-effecting elements of the transducer/probe/end effector, i.e., pulse, duty cycle, frequency, etc. The heart of the circuitry is what will be converted to a surface mounted board for the next phase, after all the parameters have been optimized and the microprocessor feedback can be installed.

  10. Steel Creek fish, L-Lake/Steel Creek Biological Monitoring Program, January 1986--December 1991

    SciTech Connect

    Sayers, R.E. Jr.; Mealing, H.G. III [Normandeau Associates, Inc., New Ellenton, SC (United States)

    1992-04-01

    The Savannah River Site (SRS) encompasses 300 sq mi of the Atlantic Coastal plain in west-central South Carolina. The Savannah River forms the western boundary of the site. Five major tributaries of the Savannah River -- Upper Three Runs Creek, Four Mile Creek, Pen Branch, Steel Creek, and Lower Three Runs Creek -- drain the site. All but Upper Three Runs Creek receive, or in the past received, thermal effluents from nuclear production reactors. In 1985, L Lake, a 400-hectare cooling reservoir, was built on the upper reaches of Steel Creek to receive effluent from the restart of L-Reactor, and protect the lower reaches from thermal impacts. The lake has an average width of approximately 600 m and extends along the Steel Creek valley approximately 7000 m from the dam to the headwaters. Water level is maintained at a normal pool elevation of 58 m above mean sea level by overflow into a vertical intake tower that has multilevel discharge gates. The intake tower is connected to a horizontal conduit that passes through the dam and releases water into Steel Creek. The Steel Creek Biological Monitoring Program was designed to meet environmental regulatory requirements associated with the restart of L-Reactor and complements the Biological Monitoring Program for L Lake. This extensive program was implemented to address portions of Section 316(a) of the Clean Water Act. The Department of Energy (DOE) must demonstrate that the operation of L-Reactor will not significantly alter the established aquatic ecosystems.

  11. Post-Supereruption (18-19 Ma) Magmatic Reactivation Beneath the Silver Creek Caldera, Black Mountains, AZ

    NASA Astrophysics Data System (ADS)

    Mcdowell, S.; Miller, C. F.; Ferguson, C.

    2011-12-01

    The Silver Creek caldera, southern Black Mountains, AZ, is the source of the supereruption that produced the Miocene (18.8 Ma) Peach Spring Tuff (PST), an extensive ignimbrite found throughout much of northwestern Arizona, southern Nevada, and southeastern California. The caldera's eastern margin is intruded by a slightly younger (18.5 +/- 0.5 Ma), ~30 km2 complex of epizonal, intermediate to felsic plutonic rocks. Because it is the largest known suite of intrusive rocks associated with the Peach Spring supereruption and contiguous (~19.5-17.5 Ma) volcanic activity in the Black Mountains, the Silver Creek intrusive complex provides a valuable record of processes operating in the shallow crust in the aftermath of a major eruption and during a period of intense volcanic activity. Rocks in the Silver Creek intrusive complex have historically been divided into two units, the Moss porphyry and the Times porphyry, though the complex exhibits textural and compositional complexity that belies a simple two-unit classification scheme. Field observations and geochemical analysis indicate that the northern portion of the Silver Creek suite comprises porphyries and coarse-grained rocks with ~62 to ~68 wt. % SiO2 ("Moss porphyry"). Rounded, 2-10 cm enclaves (59 wt. % SiO2) with crenulate margins are sparse overall but locally abundant in this portion of the complex. The southern part of the complex consists of leucogranitic porphyry and coarse-grained granite with >70 wt. % SiO2 ("Times porphyry"). At the east/west-trending Times/Moss contact zone along Silver Creek, the coarse-grained component of the Times contains < 0.5-2 m-diameter, fine-grained enclaves with crenulate margins and compositions similar to that of the intermediate Moss to the north. Mafic, intermediate, and felsic porphyritic dikes crosscut the entire complex. Major and trace element compositions of the Silver Creek intrusive complex define a coherent and continuous array extending from the most mafic enclaves to the most silicic Times, consistent with their representing a broadly cogenetic suite. Our preliminary data reveal that the Times units are geochemically similar to rhyolitic pumice in PST outflow, while the Moss is geochemically comparable to voluminous trachydacite lava and tuff that erupted shortly before the PST. The geochemical and age data, combined with field evidence for mafic reheating and magma mixing, suggest that the Silver Creek intrusive complex records rapid reinvigoration of the magmatic system that fed the PST supereruption and its volcanic predecessors in the Black Mountains.

  12. 33 CFR 117.401 - Trail Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Indiana § 117.401 Trail Creek. (a) The draw of the Franklin Street bridge, mile 0.5 at Michigan City, shall be...

  13. 33 CFR 117.401 - Trail Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Indiana § 117.401 Trail Creek. (a) The draw of the Franklin Street bridge, mile 0.5 at Michigan City, shall be...

  14. 33 CFR 117.401 - Trail Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Indiana § 117.401 Trail Creek. (a) The draw of the Franklin Street bridge, mile 0.5 at Michigan City, shall be...

  15. 33 CFR 117.401 - Trail Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Indiana § 117.401 Trail Creek. (a) The draw of the Franklin Street bridge, mile 0.5 at Michigan City, shall be...

  16. 33 CFR 117.401 - Trail Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Indiana § 117.401 Trail Creek. (a) The draw of the Franklin Street bridge, mile 0.5 at Michigan City, shall be...

  17. 33 CFR 117.577 - Weems Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.577 Weems Creek. The draw of the S437 bridge, mile 0.7 at West Annapolis, shall open on signal from...

  18. 33 CFR 117.557 - Curtis Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.557 Curtis Creek. The draw of the I695 bridge...open on signal if at least a one-hour notice is given to the Maryland Transportation Authority in Baltimore. [CGD...

  19. 33 CFR 117.555 - College Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.555 College Creek. The draws of the Naval Academy highway bridge, mile 0.3 at Annapolis, and the Maryland highway bridge, mile 0.4 at Annapolis, need not be...

  20. 33 CFR 117.555 - College Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.555 College Creek. The draws of the Naval Academy highway bridge, mile 0.3 at Annapolis, and the Maryland highway bridge, mile 0.4 at Annapolis, need not be...

  1. 33 CFR 117.563 - Marshyhope Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.563 Marshyhope Creek. The draw of the S14 bridge, mile 5.8 at Brookview, need not be opened for the...

  2. 33 CFR 117.557 - Curtis Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.557 Curtis Creek. The draw of the I695 bridge...open on signal if at least a one-hour notice is given to the Maryland Transportation Authority in Baltimore. [CGD...

  3. 33 CFR 117.555 - College Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.555 College Creek. The draws of the Naval Academy highway bridge, mile 0.3 at Annapolis, and the Maryland highway bridge, mile 0.4 at Annapolis, need not be...

  4. 33 CFR 117.557 - Curtis Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.557 Curtis Creek. The draw of the I695 bridge...open on signal if at least a one-hour notice is given to the Maryland Transportation Authority in Baltimore. [CGD...

  5. 33 CFR 117.563 - Marshyhope Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.563 Marshyhope Creek. The draw of the S14 bridge, mile 5.8 at Brookview, need not be opened for the...

  6. 33 CFR 117.557 - Curtis Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.557 Curtis Creek. The draw of the I695 bridge...open on signal if at least a one-hour notice is given to the Maryland Transportation Authority in...

  7. 33 CFR 117.563 - Marshyhope Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.563 Marshyhope Creek. The draw of the S14 bridge, mile 5.8 at Brookview, need not be opened for the...

  8. 33 CFR 117.557 - Curtis Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.557 Curtis Creek. The draw of the I695 bridge...open on signal if at least a one-hour notice is given to the Maryland Transportation Authority in Baltimore. [CGD...

  9. 33 CFR 117.543 - Bear Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.543 Bear Creek. (a) The draw of the Peninsula Parkway Bridge, mile 2.1, between Dundalk and...

  10. 33 CFR 117.577 - Weems Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.577 Weems Creek. The draw of the S437 bridge, mile 0.7 at West Annapolis, shall open on signal from...

  11. 33 CFR 117.558 - Curtis Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.558 Curtis Creek. (a) The draw of the Pennington...open on signal if at least a one-hour notice is given to the Maryland Transportation Authority in Baltimore....

  12. 33 CFR 117.555 - College Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.555 College Creek. The draws of the Naval Academy highway bridge, mile 0.3 at Annapolis, and the Maryland highway bridge, mile 0.4 at Annapolis, need not be...

  13. 33 CFR 117.555 - College Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...DRAWBRIDGE OPERATION REGULATIONS Specific Requirements Maryland § 117.555 College Creek. The draws of the Naval Academy highway bridge, mile 0.3 at Annapolis, and the Maryland highway bridge, mile 0.4 at Annapolis, need not be...

  14. Weir Control at Beaver Creek below Linton

    USGS Multimedia Gallery

    Weir control at Beaver Creek below Linton, North Dakota.  For more information on the use of weirs to aid in the determination of streamflow, see volumes 1 and 2 of the USGS Water Supply Paper, Measurement and Computation of Streamflow....

  15. 33 CFR 117.815 - Westchester Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.815 Westchester Creek. The draw of the Bruckner Boulevard/Unionport Bridge, mile 1.7, at the Bronx, New York, shall open on signal if at least a...

  16. 33 CFR 117.815 - Westchester Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.815 Westchester Creek. The draw of the Bruckner Boulevard/Unionport Bridge, mile 1.7, at the Bronx, New York, shall open on signal if at least a...

  17. 33 CFR 117.929 - Durham Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.929 Durham Creek. The removable span of the Seaboard System Railroad bridge, mile 1.7 at Bushy...

  18. 33 CFR 117.929 - Durham Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.929 Durham Creek. The removable span of the Seaboard System Railroad bridge, mile 1.7 at Bushy...

  19. 33 CFR 117.929 - Durham Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.929 Durham Creek. The removable span of the Seaboard System Railroad bridge, mile 1.7 at Bushy...

  20. 33 CFR 117.935 - Rantowles Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.935 Rantowles Creek. The draw of the Seaboard System Railroad bridge, 1.1 near Rantowles, need...

  1. 33 CFR 117.935 - Rantowles Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.935 Rantowles Creek. The draw of the Seaboard System Railroad bridge, 1.1 near Rantowles, need...

  2. 33 CFR 117.935 - Rantowles Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.935 Rantowles Creek. The draw of the Seaboard System Railroad bridge, 1.1 near Rantowles, need...

  3. 33 CFR 117.935 - Rantowles Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.935 Rantowles Creek. The draw of the Seaboard System Railroad bridge, 1.1 near Rantowles, need...

  4. 33 CFR 117.929 - Durham Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.929 Durham Creek. The removable span of the Seaboard System Railroad bridge, mile 1.7 at Bushy...

  5. 33 CFR 117.935 - Rantowles Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...COAST GUARD, DEPARTMENT OF HOMELAND SECURITY BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements South Carolina § 117.935 Rantowles Creek. The draw of the Seaboard System Railroad bridge, 1.1 near Rantowles, need...

  6. Wallace Creek Interpretive Trail: A Geologic Guide

    NSDL National Science Digital Library

    Aron Meltzner

    This set of guides covers the geology, seismology, hydrology, and physical geography of the San Andreas Fault in the area of Wallace Creek in San Luis Obispo County, California. Materials available here include a downloadable trail guide for Wallace Creek; an interactive guide with information on the earthquakes, the fault, and plate tectonics; a downloadable guide from the Geologic Society of America (GSA); and a downloadable self-guided automobile tour for the Carrizo Plain. There are also field exercises which instructors may find useful as class assignments to accompany class trips to the Wallace Creek site, and a link to a bulletin from the GSA that explores the research done at Wallace Creek and explains how the slip rate for the San Andreas fault was measured.

  7. Habitat Evaluation Procedures (HEP) Report; Calispell Creek Project, Technical Report 2004-2005.

    SciTech Connect

    Entz, Ray

    2005-02-01

    On July 13, 2004, the Habitat Evaluation Procedure (HEP) was used to determine baseline habitat suitability on the Calispell Creek property, an acquisition completed by the Kalispel Tribe of Indians in February 2004. Evaluation species and appropriate models include Canada goose, mallard, muskrat, yellow warbler, and white-tailed deer. Habitat Suitability Index (HSI) values were visually estimated and agreed upon by all HEP team members. The Calispell Creek Project provides a total of 138.17 Habitat Units (HUs) for the species evaluated. Emergent wetland habitat provides 5.16 HUs for mallard and muskrat. Grassland provides 132.02 HUs for mallard and Canada goose. Scrub-shrub vegetation provides 0.99 HUs for yellow warbler and white-tailed deer. The objective of using HEP at the Calispell Creek Project and other protected properties is to document the quality and quantity of available habitat for selected wildlife species. In this way, HEP provides information on the relative value of the same area at future points in time so that the effect of management activities on wildlife habitat can be quantified. When combined with other tools, the baseline HEP will be used to determine the most effective on-site management, restoration, and enhancement actions to increase habitat suitability for targeted species. The same process will be replicated every five years to quantitatively evaluate the effectiveness of management strategies in improving and maintaining habitat conditions while providing additional crediting to BPA for enhanced habitat values.

  8. Respirators, internal dose, and Oyster Creek

    Microsoft Academic Search

    Michal

    1996-01-01

    This article looks at the experience of Oyster Creek in relaxing the requirements for the use of respirators in all facets of plant maintenance, on the overall dose received by plant maintenance personnel. For Roger Shaw, director of radiological controls for three years at GPU Nuclear Corporation`s Oyster Creek nuclear plant the correct dose balance is determined on a job-by-job

  9. 6. VIEW OF BAMBOO GATE LEADING INTO WHITE GRAVEL AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    6. VIEW OF BAMBOO GATE LEADING INTO WHITE GRAVEL AND ROCK CLUSTER GARDEN REMINISCENT OF RYOAN-JI TEMPLE GARDEN IN KYOTO - Kykuit, Japanese Gardens, 200 Lake Road, Pocantico Hills, Westchester County, NY

  10. Volcanic and plutonic rocks exposed in east-central California record a long history of

    E-print Network

    Barton, Mark D.

    ABSTRACT Volcanic and plutonic rocks exposed in east-central California record a long history of metasomatism and/or metamorphism within the Mesozoic Cordilleran continental arc. We use whole-rock and mineral- ation histories of Late Triassic to Middle Jurassic metavolcanic rocks in the Ritter Range, White

  11. Painter Reservoir, east Painter Reservoir and Clear Creek Fields, Uinta County, Wyoming

    SciTech Connect

    Frank, J.R.; Cluff, S.; Bauman, J.M.

    1982-01-01

    Painter Reservoir, East Painter Reservoir, and Clear Creek fields are part of a series of recent major hydrocarbon discoveries in the Thrust Belt Province of NE. Utah-SW. Wyoming that began with the discovery of the Pineview field in Utah. Oil and gas production in the fields is from the Triassic-Jurassic Nugget Sandstone. There the Nugget is a varicolored, fine- to medium-grained quartz arenite believed to be of eolian origin. Core porosity averages 12.5% and core permeability averages ca 5.4 md. All 3 fields occur in reverse-faulted, asymmetric folds on the hanging wall of the Absaroka thrust and overlie Cretaceous source rocks. The Painter Reservoir and Clear Creek structures are much steeper on the east whereas the East Painter structure is much steeper on the west.

  12. Major Rock Groups

    NSDL National Science Digital Library

    This resource from the University of Saskatchewan contains general information on the major rock groups: igneous, metamorphic and sedimentary. Describes the rock cycle and the properties and formation of each major rock group.

  13. Habitat Evaluation Procedures (HEP) Report; Tacoma Creek South Project, Technical Report 2003-2005.

    SciTech Connect

    Entz, Ray

    2005-02-01

    On July 6, 2004, the Habitat Evaluation Procedure (HEP) was used to determine baseline habitat suitability on the Tacoma Creek South property, an acquisition completed by the Kalispel Tribe of Indians in June 2004. Evaluation species and appropriate models include bald eagle, black-capped chickadee, Canada goose, mallard, muskrat, yellow warbler, and white-tailed deer. Habitat Suitability Index (HSI) values were visually estimated and agreed upon by all HEP team members. The Tacoma Creek South Project provides a total of 190.79 Habitat Units (HUs) for the species evaluated. Emergent wetlands provide 20.51 HUs for Canada goose, mallard, and muskrat. Grassland provides 1.65 HUs for Canada goose and mallard. Scrub-shrub vegetation provides 11.76 HUs for mallard, yellow warbler, and white-tailed deer. Conifer forest habitat provides 139.92 HUs for bald eagle, black-capped chickadee, and white-tailed deer. Deciduous forest also provides 19.15 HUs for bald eagle, black-capped chickadee, mallard, and white-tailed deer. The objective of using HEP at the Tacoma Creek South Project and other protected properties is to document the quality and quantity of available habitat for selected wildlife species. In this way, HEP provides information on the relative value of the same area at future points in time so that the effect of management activities on wildlife habitat can be quantified. When combined with other tools, the baseline HEP will be used to determine the most effective on-site management, restoration, and enhancement actions to increase habitat suitability for targeted species. The same process will be replicated every five years to quantitatively evaluate the effectiveness of management strategies in improving and maintaining habitat conditions while providing additional crediting to BPA for enhanced habitat values.

  14. FLAT ROCK CEDAR GLADES AND BARRENS CLASS II NATURAL-SCIENTIFIC STATE NATURAL AREA

    E-print Network

    Howard, Stephen

    associated with these cedar glades include Tennessee milk-vetch (Astragalus tennesseensis), Missouri primrose (Oenothera missouriensis), and limestone fame-flower (Talinum calcaricum). Small creek tributaries and flat significant as the type location for the federal listed Pyne's ground-plum (Astragalus bibullatus). Flat Rock

  15. All About Rocks

    NSDL National Science Digital Library

    Aubree Miller

    2009-12-14

    Rocks are the most common material on earth. We will learn about the 3 main types of rocks and how they are made. Let's do a little warm up... 1.What do you already know about rocks? 2.Where have you seen rocks before? 3.Name all the ways you can think of that people use rocks, and what they use them for... 4.Do you know how rocks are formed? 5.What do you think the world would be like without any ...

  16. Collecting and Identifying Rocks

    NSDL National Science Digital Library

    Linda Harvey, Marquette Catholic School, Virginia,MN

    In this Earth Science activity, students will investigate rocks in an outdoor field trip. Students will be divided into groups and given a Ziploc bag to collect rocks. We will then return to the classroom, and the students will put their rocks into different groups. The different groups could be the size, shape, color, and texture of the rocks. We will then talk about the Rock Cycle and the three main types of rocks. Students will record their observations in their science journals.

  17. Rocks are fun

    NSDL National Science Digital Library

    Lori Peterson

    2009-12-14

    Rocks are the most common material on earth. We will learn about the parts that make up the rocks and sort rocks based upon color, hardness, texture, layering, and particle size. Click on each of the links below to learn about the main types of rocks and then answer the questions that follow. *Igneous Rocks 1. In your own words, explain the TWO ways in which an igneous rock can be formed. 2. Please illustrate ONE of the ways an igneous rock is formed. *Metamorphic Rocks 1. Why ...

  18. Rock Cycle Roundabout

    NSDL National Science Digital Library

    2012-06-26

    In this activity, learners will learn how igneous rock, metamorphic rock, and sedimentary rock are formed as part of the rock cycle and that the same forces that produce/change rocks also produce/change landforms. They will learn this by playing a game where one player must describe a type of rock (that is chosen by random card selection) to another player who then must guess what type of rock that is. Then, there may be a discussion of geologic time and learners can create a timeline model based on the sequence of rock types that were chosen in the game.

  19. Eccentricity and precession forced cyclicity in the Upper Silurian Williamsport Sandstone Member of the Wills Creek Formation

    Microsoft Academic Search

    S. D. Shelton; E. J. Anderson

    1993-01-01

    The Williamsport Sandstone Member, located at the base of the Wills Creek Formation, contains a complete 5th order sequence, traceable for more than 100 kilometers. This 5th order sequence is initiated with a massive iron-rich sandstone unit. The upper iron-rich sand of the Williamsport Member marks the beginning of the next 5th order sequence. The first 5th order rock cycle,

  20. All About Rocks

    NSDL National Science Digital Library

    Miss Quinn

    2005-06-16

    What does igneous mean? What is a sedimentary rock? You have been given the challenge to learn all you can about rocks and minerals. Use the following sites to collect information. You will be compiling the information you learn into a book for the other classes. These two sites will give you information about how rocks are formed. Make sure you find out the 3 types of rocks! Discover How Rocks Are Formed Rocks for Kids What is the difference between a rock and a mineral? See if you can figure it out on these two sites. This planet really rocks! : all about rocks and minerals Rocks for Kids Test your knowledge about rocks with a ...

  1. Hoe Creek groundwater restoration, 1989

    SciTech Connect

    Renk, R.R.; Crader, S.E.; Lindblom, S.R.; Covell, J.R.

    1990-01-01

    During the summer of 1989, approximately 6.5 million gallons of contaminated groundwater were pumped from 23 wells at the Hoe Creek underground coal gasification site, near Gillette, Wyoming. The organic contaminants were removed using activated carbon before the water was sprayed on 15.4 acres at the sites. Approximately 2647 g (5.8 lb) of phenols and 10,714 g (23.6 lb) of benzene were removed from the site aquifers. Phenols, benzene, toluene, ethylbenzene, and naphthalene concentrations were measured in 43 wells. Benzene is the only contaminant at the site exceeds the federal standard for drinking water (5 {mu}g/L). Benzene leaches into the groundwater and is slow to biologically degrade; therefore, the benzene concentration has remained high in the groundwater at the site. The pumping operation affected groundwater elevations across the entire 80-acre site. The water levels rebounded quickly when the pumping operation was stopped on October 1, 1989. Removing contaminated groundwater by pumping is not an effective way to clean up the site because the continuous release of benzene from coal tars is slow. Benzene will continue to leach of the tars for a long time unless its source is removed or the leaching rate retarded through mitigation techniques. The application of the treated groundwater to the surface stimulated plant growth. No adverse effects were noted or recorded from some 60 soil samples taken from twenty locations in the spray field area. 20 refs., 52 figs., 8 tabs.

  2. V00306010057 rock check dam

    E-print Network

    ¬« ¬« ¬« ¬« ¬« XY! 16-020 16-030(c) 16-026(l) 16-028(c) 16-026(l) V00306010057 rock check dam V00306010012 rock check dam V00306010040 rock check dam V00306010039 rock check dam V00306010058 rock check dam V00306010064 rock check dam V00306010061 rock check dam V00306010062 rock check dam V00306010063

  3. Geochemistry of the Birch Creek Drainage Basin, Idaho

    USGS Publications Warehouse

    Swanson, Shawn A.; Rosentreter, Jeffrey J.; Bartholomay, Roy C.; Knobel, LeRoy L.

    2003-01-01

    The U.S. Survey and Idaho State University, in cooperation with the U.S. Department of Energy, are conducting studies to describe the chemical character of ground water that moves as underflow from drainage basins into the eastern Snake River Plain aquifer (ESRPA) system at and near the Idaho National Engineering and Environmental Laboratory (INEEL) and the effects of these recharge waters on the geochemistry of the ESRPA system. Each of these recharge waters has a hydrochemical character related to geochemical processes, especially water-rock interactions, that occur during migration to the ESRPA. Results of these studies will benefit ongoing and planned geochemical modeling of the ESRPA at the INEEL by providing model input on the hydrochemical character of water from each drainage basin. During 2000, water samples were collected from five wells and one surface-water site in the Birch Creek drainage basin and analyzed for selected inorganic constituents, nutrients, dissolved organic carbon, tritium, measurements of gross alpha and beta radioactivity, and stable isotopes. Four duplicate samples also were collected for quality assurance. Results, which include analyses of samples previously collected from four other sites, in the basin, show that most water from the Birch Creek drainage basin has a calcium-magnesium bicarbonate character. The Birch Creek Valley can be divided roughly into three hydrologic areas. In the northern part, ground water is forced to the surface by a basalt barrier and the sampling sites were either surface water or shallow wells. Water chemistry in this area was characterized by simple evaporation models, simple calcite-carbon dioxide models, or complex models involving carbonate and silicate minerals. The central part of the valley is filled by sedimentary material and the sampling sites were wells that are deeper than those in the northern part. Water chemistry in this area was characterized by simple calcite-dolomite-carbon dioxide models. In the southern part, ground water enters the ESRPA. In this area, the sampling sites were wells with depths and water levels much deeper than those in the northern and central parts of the valley. The calcium and carbon water chemistry in this area was characterized by a simple calcite-carbon dioxide model, but complex calcite-silicate models more accurately accounted for mass transfer in these areas. Throughout the geochemical system, calcite precipitated if it was an active phase in the models. Carbon dioxide either precipitated (outgassed) or dissolved depending on the partial pressure of carbon dioxide in water from the modeled sites. Dolomite was an active phase only in models from the central part of the system. Generally the entire geochemical system could be modeled with either evaporative models, carbonate models, or carbonate-silicate models. In both of the latter types of models, a significant amount of calcite precipitated relative to the mass transfer to and from the other active phases. The amount of calcite precipitated in the more complex models was consistent with the amount of calcite precipitated in the simpler models. This consistency suggests that, although the simpler models can predict calcium and carbon concentrations in Birch Creek Valley ground and surface water, silicate-mineral-based models are required to account for the other constituents. The amount of mass transfer to and from the silicate mineral phases was generally small compared with that in the carbonate phases. It appears that the water chemistry of well USGS 126B represents the chemistry of water recharging the ESRPA by means of underflow from the Birch Creek Valley.

  4. 8. VIEW LOOKING SOUTH OF KILLBUCK CREEK TAKEN FROM THE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. VIEW LOOKING SOUTH OF KILLBUCK CREEK TAKEN FROM THE BRIDGE DECK SHOWING THE SECOND OR THIRD GROWTH SPROUT. - Madison County Bridge 90, Spanning Killbuck Creek on County Road No. 600, Moonville, Madison County, IN

  5. 76 FR 71936 - Upper Deckers Creek Watershed, Preston County, WV

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-21

    ...Conservation Service Upper Deckers Creek Watershed, Preston County, WV AGENCY: Natural...prepared for the Upper Deckers Creek Watershed, Preston County, West Virginia. FOR...Domestic Assistance under No. 10.904--Watershed Protection and Flood...

  6. 13. View of Sterling Creek Marsh looking southeast; looking at ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. View of Sterling Creek Marsh looking southeast; looking at canal going to the tree line - Richmond Hill Plantation, Sterling Creek Marsh, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

  7. 14. VIEW OF CEDAR MILL CREEK TRESTLE FROM TRESTLE OVER ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. VIEW OF CEDAR MILL CREEK TRESTLE FROM TRESTLE OVER CEDAR MILL CREEK ON SPUR LINE, FACING SOUTHWEST - Oregon Electric Railway Westside Corridor, Between Watson & 185th Avenues, Beaverton, Washington County, OR

  8. 13. VIEW FROM CEDAR MILL CREEK TRESTLE NEAR MERLO ROAD ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. VIEW FROM CEDAR MILL CREEK TRESTLE NEAR MERLO ROAD TOWARD TRESTLE ON SPUR TRACK OVER CEDAR MILL CREEK, FACING NORTHEAST - Oregon Electric Railway Westside Corridor, Between Watson & 185th Avenues, Beaverton, Washington County, OR

  9. 1. WATER ENTERING CONFLUENCE POOL FROM BEAR CREEK AT LEFT, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. WATER ENTERING CONFLUENCE POOL FROM BEAR CREEK AT LEFT, AND FROM SANTA ANA RIVER THROUGH TUNNEL #0 AT RIGHT. VIEW TO NORTHEAST. - Santa Ana River Hydroelectric System, Bear Creek Diversion Dam & Confluence Pool, Redlands, San Bernardino County, CA

  10. 20. View of Sterling Creek Marsh looking southwest with oyster ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. View of Sterling Creek Marsh looking southwest with oyster house in the tree line - Richmond Hill Plantation, Sterling Creek Marsh, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

  11. NAME: Alligator Creek Addition Restoration Project LOCATION: Charlotte County, Florida

    E-print Network

    US Army Corps of Engineers

    NAME: Alligator Creek Addition Restoration Project LOCATION: Charlotte County, Florida ACRES of the Alligator Creek Addition parcel. The area has been severely impacted by the construction of mosquito ditches

  12. 8. Double arch culvert on Laurel Creek Road looking WSW. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    8. Double arch culvert on Laurel Creek Road looking WSW. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

  13. 7. Elevation of single arch stone bridge on Laurel Creek ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    7. Elevation of single arch stone bridge on Laurel Creek Road looking N. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

  14. 1. View of Laurel Creek Road, revetment wall and cliff ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. View of Laurel Creek Road, revetment wall and cliff looking S. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

  15. 9. Double arch culvert on Laurel Creek Road looking ENE. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    9. Double arch culvert on Laurel Creek Road looking ENE. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

  16. 3. View of Sterling Creek Marsh at low tide showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. View of Sterling Creek Marsh at low tide showing rubble at the entrance of dam/bridge looking southwest - Richmond Hill Plantation, Sterling Creek Marsh, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

  17. 4. View of Sterling Creek Marsh at low tide showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. View of Sterling Creek Marsh at low tide showing rubble at the entrance of the dam/bridge looking east - Richmond Hill Plantation, Sterling Creek Marsh, East of Richmond Hill on Ford Neck Road, Richmond Hill, Bryan County, GA

  18. 40. UNDERSIDE OF TOWN CREEK SPAN (LEFT) AND PEARMAN BRIDE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    40. UNDERSIDE OF TOWN CREEK SPAN (LEFT) AND PEARMAN BRIDE (RIGHT) FROM BENEATH BRIDGES, FACING EAST TOWARDS COOPER RIVER SPAN - Grace Memorial Bridge, U.S. Highway 17 spanning Cooper River & Town Creek , Charleston, Charleston County, SC

  19. Everybody Find a Rock

    NSDL National Science Digital Library

    In this lesson, younger students will learn to recognize the properties of selected rocks. After participating in a read-aloud, the students will examine a variety of polished rocks, and take a walk outside to find their own rocks. As a closure activity, they are directed to explore other unique rocks at home and bring them in for class discussion and sorting.

  20. Rollerjaw Rock Crusher

    NASA Technical Reports Server (NTRS)

    Peters, Gregory; Brown, Kyle; Fuerstenau, Stephen

    2009-01-01

    The rollerjaw rock crusher melds the concepts of jaw crushing and roll crushing long employed in the mining and rock-crushing industries. Rollerjaw rock crushers have been proposed for inclusion in geological exploration missions on Mars, where they would be used to pulverize rock samples into powders in the tens of micrometer particle size range required for analysis by scientific instruments.

  1. All About Rocks

    NSDL National Science Digital Library

    Whitney Frankovic

    2009-09-28

    Rocks are the most common material on earth. We will learn about the parts that make up the rocks and sort rocks based upon color, hardness, texture, layering, and particle size. Lets review: What do you already know about rocks? Please write down your thoughts on a piece of paper. Now, click on the link below to find out what the definition of a rock is. *Intro to Rocks Please answer the questions below in complete sentences on your paper. 1. Rocks are made up of several particles. ...

  2. An economic evaluation of the Sulphur Creek Watershed Project

    E-print Network

    Burns, Henry Taylor

    1967-01-01

    Research BIBLIOGRAPHY 57 LIST OF TABLES Table 1. Project Costs, Sulphur Creek Watershed Project Flood Damage With and Without the Sulphur Creek Watershed Project, 1961-1967 Page 32 Total Property Evaluation, City of Lampasas, 1947-1966 Comparison... of Actual and Projected Costs, Sulphur Creek Watershed, 1961-1967 35 42 Comparison of Actual and Projected Benefits, . Sulphur Creek Watershed, 1961-1967 . . . ~ . . . . . ~ 44 CHAPTER I INTRODUCTION Statement of the Problem The Federal government...

  3. Steel Creek water quality: L-Lake/Steel Creek Biological Monitoring Program, November 1985--December 1991

    SciTech Connect

    Bowers, J.A. [Westinghouse Savannah River Co., Aiken, SC (United States); Kretchmer, D.W.; Chimney, M.J. [Normandeau Associates, Inc., New Ellenton, SC (United States)

    1992-04-01

    The Savannah River Site (SRS) encompasses 300 sq mi of the Atlantic Coastal Plain in west-central South Carolina. The Savannah River forms the western boundary of the site. Five major tributaries of the Savannah River -- upper Three Runs Creek, Four Mile Creek, Pen Branch, Steel Creek, and Lower Three Runs Creek -- drain the site. All but Upper Three Runs Creek receive, or in the past received, thermal effluents from nuclear production reactors. In 1985, L Lake, a 400-hectare cooling reservoir, was built on the upper reaches of Steel Creek to receive effluent from the restart of L-Reactor, and protect the lower reaches from thermal impacts. The Steel Creek Biological Monitoring Program was designed to meet envirorunental regulatory requirements associated with the restart of L-Reactor and complements the Biological Monitoring Program for L Lake. This extensive program was implemented to address portions of Section 316(a) of the Clean Water Act. The Department of Energy (DOE) must demonstrate that the operation of L-Reactor will not significantly alter the established aquatic ecosystems.

  4. Water-quality appraisal, Mammoth Creek and Hot Creek, Mono County, California

    USGS Publications Warehouse

    Setmire, J.G.

    1984-01-01

    A late summer reconnaissance in 1981 and a spring high-flow sampling in 1982 of Mammoth Creek and Hot Creek, located in the Mammoth crest area of the Sierra Nevada, indicated that mineralization, eutrophication, sedimentation, and limited areas of fecal contamination were occurring. Mineralization, indicated by a downstream increase in dissolved-solids concentration, was due primarily to geothermal springs that gradually decreased in the percentage of calcium, increased in the percentage of magnesium and sodium, and caused fluctuating, but overall increasing percentage of fluoride, sulfate, and chloride. Resulting water quality in Mammoth Creek was similar to that of the springs forming Hot Creek. Eutrophication was observed in Twin Lakes and the reach of Hot Creek below the fish hatchery. Twin Lakes had floating mats of algae and a high dissolved-oxygen saturation of 147 percent at a pH of 9.2. Hot Creek had excessive aquatic vascular plant and algae growth, dissolved-oxygen saturations ranging from 65 to 200 percent, algal growth potential of 30 milligrams per liter, and nitrates and phosphates of 0.44 and 0.157 milligrams per liter. Sedimentation was noted in observations of bed-material composition showing the presence of fine material beginning at Sherwin Creek Road. Fecal contamination was indicated by fecal coliform counts of 250 colonies per 100 milliliters and fecal streptococcal counts greater than 1,000 colonies per 100 milliliters. (USGS)

  5. FIDDLER CREEK POLYMER AUGMENTATION PROJECT

    SciTech Connect

    Lyle A. Johnson, Jr.

    2001-10-31

    The Fiddler Creek field is in Weston County, Wyoming, and was discovered in 1948. Secondary waterflooding recovery was started in 1955 and terminated in the mid-1980s with a fieldwide recovery of approximately 40%. The West Fiddler Creek Unit, the focus of this project, had a lower recovery and therefore has the most remaining oil. Before the project this unit was producing approximately 85 bbl of oil per day from 20 pumping wells and 17 swab wells. The recovery process planned for this project involved adapting two independent processes, the injection of polymer as a channel blocker or as a deep-penetrating permeability modifier, and the stabilization of clays and reduction of the residual oil saturation in the near-wellbore area around the injection wells. Clay stabilization was not conducted because long-term fresh water injection had not severely reduced the injectivity. It was determined that future polymer injection would not be affected by the clay. For the project, two adjoining project patterns were selected on the basis of prior reservoir studies and current well availability and production. The primary injection well of Pattern 1 was treated with a small batch of MARCIT gel to create channel blocking. The long-term test was designed for three phases: (1) 77 days of injection of a 300-mg/l cationic polyacrylamide, (2) 15 days of injection of a 300-mg/l anionic polymer to ensure injectivity of the polymer, and (3) 369 days of injection of the 300-mg/l anionic polymer and a 30:1 mix of the crosslinker. Phases 1 and 2 were conducted as planned. Phase 3 was started in late March 1999 and terminated in May 2001. In this phase, a crosslinker was added with the anionic polymer. Total injection for Phase 3 was 709,064 bbl. To maintain the desired injection rate, the injection pressure was slowly increased from 1,400 psig to 2,100 psig. Early in the application of the polymer, it appeared that the sweep improvement program was having a positive effect on Pattern 1 with lesser effects in Pattern 2. These early observations did not continue to develop. The oil production for both patterns remained fairly constant to the rates established by the restart of waterflooding. The water production declined but stabilized in both patterns. The stabilization of the oil at prepolymer rates and water production at the lower rates can be attributed to the polymer injection, but the effect was not as great as originally predicted. The sweep improvement for the patterns appeared to be negatively impacted by extended shutdowns in the injection and production systems. Such problems as those experienced in this project can be expected when long-term polymer injection is started in old waterflood fields. To prevent these problems, new injection and production tubulars and pumps would be required at a cost prohibitive to the present, independent operators. Unless the future results from the continued waterflood show positive effects of the long-term polymer injection, it appears that the batch-type polymer treatment may have more promise than the long-term treatment and should be more cost effective.

  6. Metamorphic Rock Identification

    NSDL National Science Digital Library

    In this activity students develop skill in the visual identification of metamorphic rock species and conceptualize the relationships between non-metamorphosed species and their metamorphic counterparts. Students will use a hand lens to examine metamorphic rocks and make observations about grain size, foliation, and other characteristics. Then, using this data, they identify the rocks with the classification sheet included with the student worksheet. They will then match the metamorphic rock with its parent rock.

  7. Water-quality appraisal. Mammoth Creek and Hot Creek, Mono County, California

    SciTech Connect

    Setmire, J.G.

    1984-06-01

    A late summer reconnaissance in 1981 and a spring high-flow sampling in 1982 of Mammoth Creek and Hot Creek, located in the Mammoth crest area of the Sierra Nevada, indicated that three water-quality processes were occurring: (1) mineralization; (2) eutrophication; and (3) sedimentation. Limited areas of fecal contamination were also observed. Mineralization due primarily to geothermal springs increased dissolved-solids concentration downstream, which changed the chemical composition of the water. The percentage of calcium decreased gradually, the percentage of magnesium and sodium increased, and the percentage of fluoride, sulfate, and chloride fluctuated, but increased overall. These changes produced water quality in Mammoth Creek similar to that of the springs forming Hot Creek. Twin Lakes and the reach of Hot Creek below the fish hatchery showed evidence of eutrophication. Twin Lakes had floating mats of algae and a high dissolved-oxygen saturation of 147% at a pH of 9.2. Hot Creek had abundant growth of aquatic vascular plants and algae, dissolved-oxygen saturations ranging from 65% to 200%, algal growth potential of 30 milligrams per liter, nitrate concentration of 0.44 milligram per liter, and phosphate concentration of 0.157 milligram per liter. Sediment deposition was determined from detailed observations of bed-material composition, which showed that fine material was deposited at Sherwin Creek Road and downstream. Fecal contamination was indicated by fecal-coliform bacteria counts of 250 colonies per 100 milliliters and fecal-streptococcal bacteria counts greater than 1000 colonies per 100 milliliters. Although bacterial sampling was sporadic and incomplete, it did indicate adverse effects on water quality for the following beneficial uses that have been identified for Mammoth Creek and Hot Creek: (1) municipal supply; (2) cold-water habitat; and (3) contact and noncontact water recreation. 6 refs., 15 figs., 15 tabs.

  8. A Rainbow Trout Rests Among Cobble Substrate in Panther Creek

    USGS Multimedia Gallery

    A rainbow trout rests among cobble substrate in Panther Creek downstream of Big Deer Creek, central Idaho. Panther Creek was severely damaged by heavy metals released from mining and milling activities at the former Blackbird Mine, and water quality in this section of the stream was acutely lethal t...

  9. Water Quality Monitoring Program In the Mill Creek System, 2008

    E-print Network

    Boynton, Walter R.

    Water Quality Monitoring Program In the Mill Creek System, 2008 - i - Ref. No. [UMCES] CBL 09-019 2008 Water Quality Monitoring Program for the Mill Creek Sub-Estuarine System Located in Southern Science #12;Water Quality Monitoring Program In the Mill Creek System, 2008 - ii - Table of Contents Page

  10. Bridge Creek Watershed Volunteer Lake Secchi Disk Monitoring Program

    E-print Network

    #12;Bridge Creek Watershed Volunteer Lake Secchi Disk Monitoring Program 1996 DOE FRAP 1996-13 Ryan Creek Watershed Volunteer Lake Monitoring Program. Using a Secchi disk, volunteers collected water transparency data from 22 lakes in the Bridge Creek watershed. Secchi depth readings were collected between May

  11. State of the Watershed: Water Quality of Boulder Creek, Colorado

    E-print Network

    State of the Watershed: Water Quality of Boulder Creek, Colorado By Sheila F. Murphy Prepared of the watershed : water quality of Boulder Creek, Colorado / by Sheila Murphy. p. cm. ­(USGS Circular ; 1284) Includes bibliographic references. 1. Water quality -- Colorado -- Boulder Creek Watershed (Boulder

  12. 75 FR 52463 - Safety Zone; Raccoon Creek, Bridgeport, NJ

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-26

    ...USCG-2010-0743] RIN 1625-AA00 Safety Zone; Raccoon Creek, Bridgeport, NJ AGENCY: Coast...establishing a safety zone in specified waters of Raccoon Creek, Bridgeport, NJ. This action...order to protect mariners in a portion of Raccoon Creek. DATES: This rule is...

  13. DRAFT ENVIRONMENTAL ASSESSMENT1 PINE CREEK DAM, OKLAHOMA2

    E-print Network

    US Army Corps of Engineers

    #12;#12;DRAFT ENVIRONMENTAL ASSESSMENT1 PINE CREEK DAM, OKLAHOMA2 DAM SAFETY MODIFICATION3 &4 Environmental Assessment Pine Creek Dam, Oklahoma Dam Safety Modification & Interim Risk Reduction Measure and risk reduction measures necessary to correct structural and maintenance deficiencies of Pine Creek Dam

  14. View of south elevation of bridge over little Pine Creek ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of south elevation of bridge over little Pine Creek (S.R. 1026, section 002 bridge), showing substructure, looking northeast - Bridge over Little Pine Creek, State Route 1026 over Little Pine Creek, 2.01 kilometers (1.25 miles) East of Bendertown, Jonestown, Columbia County, PA

  15. View of north elevation of bridge over little Pine Creek ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of north elevation of bridge over little Pine Creek (S.R. 1026, section 002 bridge) looking south - Bridge over Little Pine Creek, State Route 1026 over Little Pine Creek, 2.01 kilometers (1.25 miles) East of Bendertown, Jonestown, Columbia County, PA

  16. View of west abutment of bridge over little Pine Creek ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of west abutment of bridge over little Pine Creek (S.R. 1026, section 002 bridge), showing substructure and wingwalls, looking southwest - Bridge over Little Pine Creek, State Route 1026 over Little Pine Creek, 2.01 kilometers (1.25 miles) East of Bendertown, Jonestown, Columbia County, PA

  17. 77 FR 73967 - Drawbridge Operation Regulation; Bear Creek, Dundalk, MD

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-12

    ...1625-AA09 Drawbridge Operation Regulation; Bear Creek, Dundalk, MD AGENCY: Coast Guard...County highway bridge at Wise Avenue across Bear Creek, mile 3.4, between Dundalk and...entitled ``Drawbridge Operation Regulation; Bear Creek, Dundalk, MD'' in the...

  18. 77 FR 5201 - Drawbridge Operation Regulation; Bear Creek, Dundalk, MD

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-02

    ...1625-AA09 Drawbridge Operation Regulation; Bear Creek, Dundalk, MD AGENCY: Coast Guard...County highway bridge at Wise Avenue across Bear Creek, mile 3.4, between Dundalk and...County highway bridge at Wise Avenue across Bear Creek, mile 3.4 between Dundalk...

  19. Tons of Heavy Metals in Mill Creek Sediments Heather Freeman

    E-print Network

    Maynard, J. Barry

    Tons of Heavy Metals in Mill Creek Sediments Heather Freeman 8/30/99 Geology Department Advisors: Dr. Kees DeJong Dr. Barry Manyard Dr. David Nash #12;Tons of heavy metals in Mill Creek sediments Heavy metals may accumulate in the sediment of rivers or creeks. Precipitation results in urban runoff

  20. White Pelican

    NSDL National Science Digital Library

    The American white pelican is still considered endangered in Alberta, Canada, where the population is increasing but fewer than half of the 20 known historic nesting islands are still in use. The site provides information on this magnificent bird: habitat, general biological data, risk factors, and management. External links to Canadian parks, nonprofit groups, and other species profiles also included.

  1. White Tern

    USGS Multimedia Gallery

    The White Tern is one of eight seabird species whose population density and susceptibility to sea-level rise was studied on the French Frigate Shoals' Tern Island by biologists with the USGS Pacific Island Ecosystems Research Center's Northwestern Hawaiian Islands Climate Change Project.  ...

  2. Geohydrologic data for selected springs in eastern Nevada through 1982, with emphasis on White Pine County

    USGS Publications Warehouse

    Pupacko, Alex; Wood, D.B.; Williams, R.P.

    1989-01-01

    Discharge and water-chemistry data for springs in eastern Nevada , with an emphasis on White Pine County, are compiled and tabulated. Discharge data for springs emanating from the deep carbonate rocks are included. The report contains: (1) miscellaneous discharge measurements for 131 selected springs in White Pine County and vicinity; (2) selected water quality data for 557 sampled springs in White Pine County and vicinity; and (3) discharge data for 42 regional springs in the eastern Nevada carbonate-rock system. (USGS)

  3. Selected hydrologic data for Fountain Creek and Monument Creek basins, east-central Colorado

    USGS Publications Warehouse

    Kuhn, Gerhard; Ortiz, Roderick F.

    1989-01-01

    Selected hydrologic data were collected during 1986, 1987, and 1988 by the U.S. Geological Survey for the Fountain Creek and Monument Creek basins, east-central Colorado. The data were obtained as part of a study to determine the present and projected effects of wastewater discharges on the two creeks. The data, which are available for 129 surface-water sites, include: (1) About 1,100 water quality analyses; (2) about 420 measurements of discharge, (3) characteristics of about 50 dye clouds associated with measurements of traveltime and reaeration , and (4) about 360 measurements of channel geometry. (USGS)

  4. The relationship of geophysical measurements to engineering and construction parameters in the Straight Creek Tunnel pilot bore, Colorado

    USGS Publications Warehouse

    Scott, J.H.; Lee, F.T.; Carroll, R.D.; Robinson, C.S.

    1968-01-01

    Seismic-refraction and electrical-resistivity measurements made along the walls of the Straight Creek Tunnel pilot bore indicate that both a low-velocity and a high-resistivity layer exist in the disturbed rock surrounding the excavation. Seismic measurements were analyzed to obtain the thickness and seismic velocity of rock in the low-velocity layer, the velocity of rock behind the layer and the amplitude of seismic energy received at the detectors. Electrical-resistivity measurements were analyzed to obtain the thickness and electrical resistivity of the high-resistivity layer and the resistivity of rock behind the layer. The electrical resistivity and the seismic velocity of rock at depth, the thickness of rock in the low-velocity layer, and the relative amplitude of seismic energy were correlated against the following parameters, all of which are important in tunnel construction: height of the tension arch, stable vertical rock load, rock quality, rate of construction and cost per foot, percentage of lagging and blocking, set spacing, and type and amount of steel support required, The correlations were statistically meaningful, having correlation coefficients ranging in absolute value from about 0??7 to nearly 1??0. This finding suggests the possibility of predicting parameters of interest in tunnel construction from geophysical measurements made in feeler holes drilled ahead of a working face. Predictions might be based on correlations established either during the early stages of construction or from geophysical surveys in other tunnels of similar design in similar geologic environments. ?? 1968.

  5. Stratigraphic and structural implications of conodont and detrital zircon U-Pb ages from metamorphic rocks of the Coldfoot terrane, Brooks Range, Alaska

    USGS Publications Warehouse

    Moore, T.E.; Aleinikoff, J.N.; Harris, A.G.

    1997-01-01

    New paleontologic and isotopic data from the Emma Creek and Marion Creek schists of the Coldfoot terrane, Arctic Alaska superterrane, central Brooks Range, suggest Devonian and possibly younger ages of deposition for their sedimentary protoliths. Conodonts from marble of the Emma Creek schist, intruded by a roughly 392 Ma orthogneiss, are late Lochkovian (early Early Devonian, between about 408 and 396 Ma) and Silurian to Devonian at two other locations. Spherical to oblong detrital zircons from quartz-mica schist of the overlying Marion Creek schist yield mostly discordant U-Pb data suggestive of provenance ages of 3.0, 2.0-1.8, and 1.5-1.4 Ga; however, several euhedral grains of zircon from Marion Creek quartz-mica schist have concordant U-Pb ages from 370 to 360 Ma. The Marion Creek schist in our study area therefore is at least 26 m.y. younger than the Emma Creek schist. The age data imply that the protolith of the Emma Creek schist is age correlative with Devonian carbonate rocks in the Hammond and North Slope terranes, whereas the Marion Creek schist is age correlative with Upper Devonian and Lower Mississippian clastic sedimentary rocks of the Endicott Group in the Endicott Mountains terrane and shale and carbonate units in the De Long Mountains and Sheenjek River terranes. Consequently, tectonic models restoring the entire Coldfoot terrane beneath partly or wholly coeval rocks of the Hammond, Endicott Mountains, De Long Mountains, and Sheenjek River terranes of the Arctic Alaska superterrane require revision. Alternative reconstructions, including restoration of the Coldfoot terrane inboard of the Endicott Mountains terrane or outboard of the De Long Mountains and Sheenjek River terranes are plausible but require either larger amounts of shortening than previously suggested or indicate problematic facies relations. copyright. Published in 1997 by the American Geophysical Union.

  6. Cripple Creek and other alkaline-related gold deposits in the Southern Rocky Mountains, USA: Influence of regional tectonics

    USGS Publications Warehouse

    Kelley, K.D.; Ludington, S.

    2002-01-01

    Alkaline-related epithermal vein, breccia, disseminated, skarn, and porphyry gold deposits form a belt in the southern Rocky Mountains along the eastern edge of the North American Cordillera. Alkaline igneous rocks and associated hydrothermal deposits formed at two times. The first was during the Laramide orogeny (about 70-40 Ma), with deposits restricted spatially to the Colorado mineral belt (CMB). Other alkaline igneous rocks and associated gold deposits formed later, during the transition from a compressional to an extensional regime (about 35-27 Ma). These younger rocks and associated deposits are more widespread, following the Rocky Mountain front southward, from Cripple Creek in Colorado through New Mexico. All of these deposits are on the eastern margin of the Cordillera, with voluminous calc-alkaline rocks to the west. The largest deposits in the belt include Cripple Creek and those in the CMB. The most important factor in the formation of all of the gold deposits was the near-surface emplacement of relatively oxidized volatile-rich alkaline magmas. Strontium and lead isotope compositions suggest that the source of the magmas was subduction-modified subcontinental lithosphere. However, Cripple Creek alkaline rocks and older Laramide alkaline rocks in the CMB that were emplaced through hydrously altered LREE-enriched rocks of the Colorado (Yavapai) province have 208Pb/204Pb ratios that suggest these magmas assimilated and mixed with significant amounts of lower crust. The anomalously hot, thick, and light crust beneath Colorado may have been a catalyst for large-scale transfer of volatiles and crustal melting. Increased dissolved H2O (and CO2, F, Cl) of these magmas may have resulted in more productive gold deposits due to more efficient magmatic-hydrothermal systems. High volatile contents may also have promoted Te and V enrichment, explaining the presence of fluorite, roscoelite (vanadium-rich mica) and tellurides in the CMB deposits and Cripple Creek as opposed to deposits to the south. Deep-seated structures of regional extent that formed during the Proterozoic allowed the magmas to rise to shallow crustal levels. Proterozoic sites of intrusions at 1.65, 1.4, and 1.1 Ga were also important precursors to alkaline-related gold deposits. Many of the larger gold deposits are located at sites of Proterozoic intrusions, and are localized at the intersection of northeast-trending ductile shear zones formed during Mesoproterozoic deformation, and an important north-trending fault formed during 1.1 Ga rifting.

  7. Sedimentology and depositional environments of part of the Walden Creek Group, central east Tennessee

    SciTech Connect

    Lewis, R.F. III (Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Geology and Geophysics); Miller, J.M.G. (Vanderbilt Univ., Nashville, TN (United States). Dept. of Geology)

    1993-03-01

    Recent questions concerning the age of the Walden Creek Group (WCG), Ocoee Supergroup have increased interest in the depositional history of these rocks. This study focuses on the sedimentology and local stratigraphy of rocks in exposures of the lithologically diverse late Precambrian and/or lower Paleozoic WCG occurring within the Kinzel Springs and Wear Cove quadrangles. Units exposed in the structurally complex Alleghenian thrust setting include the Licklog, Shields, and Wilhite formations. These rocks are divided into twelve lithofacies composed of shale, siltstone, sandstone, conglomerate and carbonate rock. The lithofacies are grouped into seven facies associations indicating deposition below storm wave base in a deep-water, probably marine, environment. Within the study area, rocks of the Wilhite Formation represent deposition in basin plain, lower slope, slope, base of slope, and sandy channel environments. Rocks of the Shields Formation are coarse channel and related overbank deposits of the inner to middle parts of a deep water fan environment. The Licklog Formation contains rocks deposited as lobe and outer-fan or fan-fringe deposits in a middle- to lower-fan environment. These formations can be placed within a single depositional system composed of a submarine slope transitional with a basin plain, and of proximal channels and distal lobes in a sand-rich submarine fan system. Inferred depositional components (associations) compare well with general models of deep-water deposits associated with high gradient fan-delta-fed margins. The basin was bounded by an uplifted, most likely block faulted, margin composed of crystalline basement located to the northwest. Local sedimentologic and stratigraphic relationships suggest an overall progradational sequence during the deposition of these rocks.

  8. Locating VOC contamination in a fractured-rock aquifer at the ground-water\\/surface-water interface using passive vapor collectors

    Microsoft Academic Search

    D. A. Vroblesky; L. C. Rhodes; J. F. Robertson; J. A. Harrigan

    1996-01-01

    Chlorinated organic solvents introduced to unlined lagoons at an industrial waste-water treatment plant in the Inner Piedmont of South Carolina resulted in ground-water contamination of a fractured-rock aquifer. Part of the ground-water contamination discharges to Little Rocky Creek, downgradient from the waste-water treatment plant. Passive vapor collectors were buried in the bottom sediment of the creek to locate areas where

  9. Water resources and potential effects of ground-water development in Maggie, Marys, and Susie Creek basins, Elko and Eureka counties, Nevada

    USGS Publications Warehouse

    Plume, R.W.

    1995-01-01

    The basins of Maggie, Marys, and Susie Creeks in northeastern Nevada are along the Carline trend, an area of large, low-grade gold deposits. Pumping of ground water, mostly for pit dewatering at one of the mines, will reach maximum rates of about 70,000 acre-ft/yr (acre-feet per year) around the year 2000. This pumping is expected to affect ground-water levels, streamflow, and possibly the flow of Carlin spring, which is the water supply for the town of Carlin, Nev. Ground water in the upper Maggie Creek Basin moves from recharge areas in mountain ranges toward the basin axis and discharges as evapotranspiration and as inflow to the stream channel. Ground water in the lower Maggie, Marys, and Susie Creek Basins moves southward from recharge areas in mountain ranges and along the channel of lower Maggie Creek to the discharge area along the Humboldt River. Ground-water underflow between basins is through permeable bedrock of Schroeder Mountain from the upper Maggie Creek Basin to the lower Maggie Creek Basin and through permeable volcanic rocks from lower Maggie Creek to Carlin spring in the Marys Creek Basin. The only source of water to the combined area of the three basins is an estimated 420,000 acre-ft/yr of precipitation. Water leaves as runoff (38,000 acre-ft/yr) and evapotranspiration of soil moisture and ground water (380,000 acre-ft/yr). A small part of annual precipitation (about 25,000 acre-ft/yr) infiltrates the soil zone and becomes ground-water recharge. This ground water eventually is discharged as evapotranspiration (11,000 acre-ft/yr) and as inflow to the Humboldt River channel and nearby springflow (7,000 acre-ft/yr). Total discharge is estimated to be 18,000 acre-ft/yr.

  10. Structural reinterpretation of Ruedi and Woody Creek quadrangles, Pitkin and Eagle Counties, Colorado: a central Colorado overthrust belt

    SciTech Connect

    Zoerner, F.P.

    1986-08-01

    The mountains northwest of Aspen, Colorado, are composed of Pennsylvanian through Triassic evaporites and molasse of the Eagle Valley, Belden, Minturn, Maroon, and State Bridge formations. Southwest of the Roaring Fork River and its tributary, Woody Creek, are Jurassic through Cretaceous sediments that unconformably overlie these older rocks. This entire sequence is located in the Elk Range thrust sheet. Along Woody Creek and the Roaring Fork River, Bryant and Freeman have mapped the continuation of the Castle Creek fault zone. These writers interpreted the fault zone as a southeast-dipping normal fault with a horst of Eagle Valley formation continuously present between the Pennsylvanian-Triassic and Cretaceous beds within the fault zone. Southwestward thrusting on a decollement within the Eagle Valley evaporite sequence would explain (1) its presence in the fault zone, (2) the 17,000 + ft of stratigraphic throw, and (3) the structural discordance across the fault zone. The author interprets the fault zone to be a northeast-dipping gravity slide that has been thrust off and possibly pushed by the Laramide Sawatch uplift. Cross sections through the area have similar geometry to those for the Elk Range and Hunters Hill thrusts to the south-southwest. The upturned heel is exposed along the Sawatch structural front between Hunter Creek (north of Aspen) and Lenado. These relationships suggest that another thrust paralleling the Fryingpan River is possible to the north. The author proposes the name Roaring fork thrust for the fault zone in the Woody Creek and Roaring Fork River valleys. The Castle Creek fault zone should be reserved for the fault zone in the drainage south of Aspen and the southwest projection of the Homestake shear zone, against which is appears to terminate.

  11. Interactives: The Rock Cycle

    NSDL National Science Digital Library

    How much do you know about rocks? Well, if you are a bit unsure about distinguishing an igneous rock from a sedimentary rock you'll certainly be on solid ground after taking a tour through this feature created by Annenberg Media. Visitors can make their way through graphically-enhanced sections that include "Types of Rocks", "How Rocks Change", and "The Rock Cycle Diagram". In the "Types of Rocks" area visitors will learn about the basic types of rocks and they can even check out a handy chart that will give them some of the finer points of rock identification. The "How Rocks Change" area provides a basic overview of the processes involved with rock creation and transformation through a heady blend of Flash animations and straight-forward prose. Finally, the "Rock Cycle Diagram" provides an illustration of rock transformation over time. This site will be quite useful to educators and anyone who has peered at a rock and wondered: "How did you come to be?"

  12. Aftereffect in rocks caused by preexisting irreversible deformations

    SciTech Connect

    Stavrogin, A.N.; Shirkes, O.A.

    1987-05-01

    In this paper, rock specimens cut as cores of a diameter of 30 mm, 80 mm in length, were subjected to irreversible deformation in a high hydrostatic pressure chamber according to Karman's procedure. The types of rocks investigated were white Koelga marble, non-burst-hazardous (NBH) sandstone from Donets Basin, limestone from Estonslanets deposit and brown coal from Shurab coal deposit. Marble specimens were subjected to the most extensive studies. The aftereffect curves are shown for each type of rock studied. Aftereffect deformations of rocks are basically creep flows occurring under the effect of residual stresses introduced into the rock material on the course of its irreversible deformation by a high hydrostatic pressure, according to the authors. The physical nature of the residual stresses in the rocks and the mechanism of their creation are examined at the level of structural elements (grains or crystals).

  13. Habitat Projects Completed within the Asotin Creek Watershed, 1998 Completion Report.

    SciTech Connect

    Johnson, Bradley J.

    1999-11-01

    The Asotin Creek Model Watershed Program (ACMWP) is the primary entity coordinating habitat projects on both private and public lands within the Asotin Creek watershed. The Asotin Creek watershed covers approximately 325 square miles in the Blue Mountains of southeastern Washington. Snake River spring chinook salmon, summer steelhead and bull trout, which are listed under the Endangered Species Act (ESA), are present in the watershed. The ACMWP began coordinating habitat projects in 1995. Approximately two hundred forty-six projects have been implemented through the ACMWP as of 1998. Fifty-nine of these projects were funded in part through Bonneville Power Administration's 1998 Columbia Basin Fish and Wildlife Program. These projects used a variety of methods to enhance and protect watershed conditions. In-stream work for fish habitat included construction of hard structures (e.g. vortex rock weirs), meander reconstruction, placement of large woody debris (LWD) and whole trees and improvements to off-channel rearing habitat; one hundred thirty-nine pools were created with these structures. Three miles of stream benefited from riparian improvements such as fencing, vegetative plantings, and noxious weed control. Two alternative water developments were completed, providing off-stream-watering sources for livestock. 20,500 ft of upland terrace construction, seven sediment basin construction, one hundred eighty-seven acres of grass seeding, eight hundred fifty acres of direct seeding and eighteen sediment basin cleanouts were implemented to reduce sediment production and delivery to streams in the watershed.

  14. Habitat Projects Completed within the Asotin Creek Watershed, 1999 Completion Report.

    SciTech Connect

    Johnson, Bradley J.

    2000-01-01

    The Asotin Creek Model Watershed Program (ACMWP) is the primary entity coordinating habitat projects on both private and public lands within the Asotin Creek watershed. The Asotin Creek watershed covers approximately 325 square miles in the Blue Mountains of southeastern Washington in WRIA 35. According to WDFW's Priority WRIA's by At-Risk Stock Significance Map, it is the highest priority in southeastern WA. Snake River spring chinook salmon, summer steelhead and bull trout, which are listed under the Endangered Species Act (ESA), are present in the watershed. The ACMWP began coordinating habitat projects in 1995. Approximately two hundred seventy-six projects have been implemented through the ACMWP as of 1999. Twenty of these projects were funded in part through Bonneville Power Administration's 1999 Columbia Basin Fish and Wildlife Program. These projects used a variety of methods to enhance and protect watershed conditions. In-stream work for fish habitat included construction of hard structures (e.g. vortex rock weirs), meander reconstruction, placement of large woody debris (LWD) and whole trees and improvements to off-channel rearing habitat; thirty-eight were created with these structures. Three miles of stream benefited from riparian improvements such as vegetative plantings (17,000 trees and shrubs) and noxious weed control. Two sediment basin constructions, 67 acres of grass seeding, and seven hundred forty-five acres of minimum till were implemented to reduce sediment production and delivery to streams in the watershed.

  15. Fossils and tFossils and the Rock Cyclehe Rock Cycle The rock cycle explains how one type of rock

    E-print Network

    Cochran-Stafira, D. Liane

    1 Fossils and tFossils and the Rock Cyclehe Rock Cycle h ^ The rock cycle explains how one type of rock can be transformed into another in nature. The Geologic Cycle 3 key events: deposition, uplift geologic time Forms Strata: layers of rock The rock cycle explains how one type of rock can be transformed

  16. V01406010015 rock check dam

    E-print Network

    XY! ¬« ¬« V01406010015 rock check dam V01406010014 rock check dam V01406010013 rock check dam 1501403010012 earthen berm V01403010008 earthen berm V01406010003 rock check dam V01406010004 rock check dam V01406010010 rock check dam V01406010011 rock check dam 15-0651 15-0307 15-0588 15-0532 15-0575 stormdrain 7160

  17. Intensive survey of the bay creek watershed, July 1992

    SciTech Connect

    Short, M.B.; Kelly, T.G.; Hefley, J.E.

    1995-05-01

    During July 1992, the Illinois Environmental Protection Agency conducted an intensive survey of the Bay Creek basin, a fifth order tributary in the Mississippi River North Central Basin. Bay Creek drains approximately 176.4 square miles primarily in Pike and a small portion of Calhoun counties. Four stations were sampled on the Bay Creek main stem and one on Honey Creek. The survey focused on macroinvertebrate communities, fish populations, instream habitat, fish tissue, sediment and water chemistry, and land use as well as a review of ambient water quality data from IEPA station KCA-01 near Nebo, Illinois, as tools to document the biological and chemical status of Bay Creek.

  18. Wallace Creek Interpretive Trail: A Geologic Guide to the San Andreas Fault at Wallace Creek

    NSDL National Science Digital Library

    These guides cover the geology, seismology, hydrology, and physical geography of the San Andreas Fault in the area of Wallace Creek in San Luis Obispo County, California. Materials available here include a downloadable trail guide for Wallace Creek; an interactive guide with information on the earthquakes,the fault, and plate tectonics; a downloadable guide from the Geologic Society of America (GSA); and a downloadable self-guided automobile tour for the Carrizo Plain. A bulletin from the GSA is available to explore some of the research done at Wallace Creek and explain in depth how the slip rate for the San Andreas fault was determined for the area. It is intended for those with some geological background and describes details not mentioned in the Interpretive Trail guide. There is also a section featuring field exercises which instructors may find useful as class assignments to accompany class trips to the Wallace Creek site.

  19. 33 CFR 207.170d - Taylor Creek, navigation lock (S-193) across the entrance to Taylor Creek at Lake Okeechobee...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Taylor Creek, navigation lock (S-193) across the entrance to Taylor Creek at Lake Okeechobee, Okeechobee...NAVIGATION REGULATIONS § 207.170d Taylor Creek, navigation lock (S-193)...

  20. 33 CFR 207.170d - Taylor Creek, navigation lock (S-193) across the entrance to Taylor Creek at Lake Okeechobee...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Taylor Creek, navigation lock (S-193) across the entrance to Taylor Creek at Lake Okeechobee, Okeechobee...NAVIGATION REGULATIONS § 207.170d Taylor Creek, navigation lock (S-193)...

  1. Lower Paleozoic Through Archean Detrital Zircon Ages From Metasedimentary Rocks of the Nome Group, Seward Peninsula, Alaska

    NASA Astrophysics Data System (ADS)

    Amato, J. M.; Miller, E. L.; Gehrels, G.

    2003-12-01

    Metamorphic rocks of Seward Peninsula have been divided into two groups based on their metamorphic grade and history: The Nome Group and the Kigluaik Group. Although it is sometime been assumed that the higher structural position of the Nome Group versus the Kigluaik Group indicates the Kigluaik Group is older, this relationship and the age of the protoliths of these rocks has never been well-established. The Nome Group includes (delete the) lower grade blueschist and greenschist facies rocks which are widespread across the Seward Peninsula (delete) Rock types include pelitic schist, more mafic chlorite-white mica-albite schist, marble, quartzite, and metabasite. An early metamorphic event (pre-120 Ma) occurred at high pressure and relatively low temperature, and is everywhere overprinted by younger deformation and greenschist facies Rare eclogite facies assemblages are preserved in metabasites, and garnet-glaucophane in some of the pelitic schists. The Kigluaik Group includes upper greenschist to granulite facies rocks that are exposed in the core of a gneiss dome. They record a younger event (~91 Ma) that occurred at higher temperatures and resulted in partial thermal overprinting of the Nome Group and upper greenschist to granulite facies assemblages forming in the Kigluaik Group. The Kigluaik Group and equivalent rocks in the Bendeleben and Darby Mountains represent at least in part similar protoliths to many of the units in the Nome Group (Till and Dumoulin, 1994). The boundary between the rocks of the Nome Group and those clearly affected by the second metamorphic event is placed arbitrarily at the "Biotite-in" isograd along the flanks of the gneiss dome. In order to assess the protolith ages and source rock ages for these units, detrital zircon ages were obtained from three samples from the Nome Group, with Kigluaik Group ages forthcoming. LA-MC-ICPMS U/Pb isotope analysis was used for dating. Two samples were collected from the western Kigluaik Mountains near Eldorado Creek and one further south along the Feather River. Each sample yielded 90-105 analyses and all uncertainties are 1 sigma. Chlorite schist MC-74 has a range of ages from the two youngest grains at 484 +/- 18 Ma and 510 +/- 7 Ma to 2984 +/- 2 Ma. Chlorite schist LMC-30 has a youngest grain at 521 +/- 2 Ma and an oldest grain of 2027 +/- 12. Quartz-mica schist LMC-58 also has a youngest grain at 521 +/- 2 Ma and an oldest grain of 2655 +/- 7 Ma. All three therefore have lower Paleozoic zircons, suggesting Lower Cambrian or younger depositional ages. Combining the data from all three rocks results in peaks on a cumulative probability plot at (in descending order of importance): 600 Ma, 683 Ma, 1593 Ma, 522 Ma, and 2985 Ma, with several smaller peaks between 774-1540 Ma and 1685-1960 Ma. Published ages from Nome Group orthogneisses are 680 Ma, suggesting the samples so far analyzed are likely in part sourced from local basement rocks that were eroded to provide ~680 Ma detrital zircons to sedimentary protoliths of part of the Nome Group.

  2. The search for a source rock for the giant Tar Sand triangle accumulation, southeastern Utah

    USGS Publications Warehouse

    Huntoon, J.E.; Hansley, P.L.; Naeser, N.D.

    1999-01-01

    A large proportion (about 36%) of the world's oil resource is contained in accumulations of heavy oil or tar. In these large deposits of degraded oil, the oil in place represents only a fraction of what was present at the time of accumulation. In many of these deposits, the source of the oil is unknown, and the oil is thought to have migrated over long distances to the reservoirs. The Tar Sand triangle in southeastern Utah contains the largest tar sand accumulation in the United States, with 6.3 billion bbl of heavy oil estimated to be in place. The deposit is thought to have originally contained 13-16 billion bbl prior to the biodegradation, water washing, and erosion that have taken place since the middle - late Tertiary. The source of the oil is unknown. The tar is primarily contained within the Lower Permian White Rim Sandstone, but extends into permeable parts of overlying and underlying beds. Oil is interpreted to have migrated into the White Rim sometime during the Tertiary when the formation was at a depth of approximately 3500 m. This conclusion is based on integration of fluid inclusion analysis, time-temperature reconstruction, and apatite fission-track modeling for the White Rim Sandstone. Homogenization temperatures cluster around 85-90??C for primary fluid inclusions in authigenic, nonferroan dolomite in the White Rim. The fluid inclusions are associated with fluorescent oil-bearing inclusions, indicating that dolomite precipitation was coeval with oil migration. Burial reconstruction suggests that the White Rim Sandstone reached its maximum burial depth from 60 to 24 Ma, and that maximum burial was followed by unroofing from 24 to 0 Ma. Time-temperature modeling indicates that the formation experienced temperatures of 85-90??C from about 35 to 40 Ma during maximum burial. Maximum formation temperatures of about 105-110??C were reached at about 24 Ma, just prior to unroofing. Thermal modeling is used to examine the history of potential source rocks for the White Rim oil. The most attractive potential sources for White Rim oil include beds within one or more of the following formations: the Proterozoic Chuar Group, which is present in the subsurface southwest of the Tar Sand triangle; the Mississippian Delle Phosphatic Member of the Deseret Limestone and equivalent formations, the Permian Kaibab Limestone, the Sinbad Limestone Member of the Triassic Moenkopi Formation, and the Jurassic Arapien Shale, Twin Creek Limestone, and Carmel Formation, which are present west of the Tar Sand triangle; the Pennsylvanian Paradox Formation in the Paradox basin east of the Tar Sand triangle; and the Permian Park City Formation northwest of the Tar Sand triangle. Each formation has a high total organic carbon content and is distributed over a wide enough geographic area to have provided a huge volume of oil. Source beds in all of the formations reached thermal maturity at times prior to or during the time that migration into the White Rim is interpreted to have occurred. Based on all available data, the most likely source for the Tar Sand triangle appears to be the Mississippian Delle Phosphatic Member of the Deseret Limestone. Secondary migration out of the Delle is interpreted to have occurred during the Cretaceous, during Sevier thrusting. Subsequent tertiary migration into the Tar Sand triangle reservoir is interpreted to have occurred later, during middle Tertiary Laramide deformation.

  3. Multidisciplinary approach (geology, geomorphology, geomechanics, geomatics) for the characterization of the Blais Creek DsGSD (Monashee Mountains, BC, Canada)

    NASA Astrophysics Data System (ADS)

    Moretti, Danilo; Giardino, Marco; Stead, Doug; Clague, John; Gibson, Dan; Ghirotti, Monica; Perotti, Luigi

    2013-04-01

    Field investigations, including detailed geological and geomorphological mapping have been coupled with stratigraphic and structural studies of the Blais Creek Deep-seated Gravitational Slope Deformations (DsGSD), Monashee Mountains, British Columbia (BC). To reconstruct the DsGSD evolutionary stages and to evaluate its controlling factors, a complex methodology has been applied, integrating orthophotos, stereo models and 3D models of the DsGSD with field and literature data concerning tectonic and glacial history of the Seymour Valley. General geomechanical properties of the deforming rock mass has been then evaluated for using in numerical models of the failure mechanism at Blais Creek and to define a broad geomechanical characterization of different portions of the DsGSD. The combination between the aerial and terrestrial photogrammetry was appropriate in terms of the quality of the information obtained more than the quantitative information. Several Ground Control Points (GCPs) and Tie Points (TPs) were selected from the original DEM received by the BC Government. The use of a multitemporal aerial triangulation gave the possibility to minimize the error relative to every single block of images. Couples of oriented photos were used to create stereoscopic models. Multitemporal variations of the Blais Creek slope were observed and compared to the actual situation of the slope. The use of terrestrial photogrammetry through Adamtech software confirmed some of the qualitative data obtained from aerial interpretation and from field survey. The limited use of terrestrial photogrammetry was due to the impossibility of orienting the 3D terrestrial models. Anyway these models were also useful to confirm one of the possible mechanisms used to describe the evolution of Blais Creek. Geomechanical analysis was performed through field work and laboratory tests to characterize the entire slope and to produce some of the values useful for a possible numerical analysis of Blais Creek. It showed interesting differences in geomechanical properties between the calc-silicate and quartzite/gneiss. The kinematic analysis showed very the different instability areas along the slope, even if variations in landforms and rock masses volume weren't widespread along Blais Creek slope during the time span covered by aerial photographs (1973-2007). Indeed, the multitemporal analysis outlined very active instability along the large upper trench and the lateral active slopes of Blais Creek. Even without significant level of risks in the area, considering the remote area involved in this instability, some relevant hazards could occur, related to the possible collapse of SE side of Blais Creek DsGSD. Regarding the long term evolution of the DsGSD, the extensive network of linear features at Blais Creek is of a large deforming rock mass. Movement probably began with the retreat of valley glaciers during deglaciation when the oversteepened valley sides were debuttressed. By these evidences it is possible to theorize that the post-glacial retreat of the rock face and removal of the ice buttress from both the Seymour and the Blais Creeek Valleys lowered the factor of stability of the mass as a whole, allowing a deep-seated shear surface to develop gradually over time by progressive creep.

  4. 33 CFR 117.841 - Smith Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    33 ? Navigation and Navigable Waters ? 1 ? 2011-07-01 ? 2011-07-01 ? false ? Smith Creek. ? 117.841 ? Section 117.841 ? Navigation and Navigable Waters ? COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ? BRIDGES ? DRAWBRIDGE OPERATION REGULATIONS ? Specific Requirements ? North Carolina ? § 117.841...

  5. 33 CFR 117.841 - Smith Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    33 ? Navigation and Navigable Waters ? 1 ? 2010-07-01 ? 2010-07-01 ? false ? Smith Creek. ? 117.841 ? Section 117.841 ? Navigation and Navigable Waters ? COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ? BRIDGES ? DRAWBRIDGE OPERATION REGULATIONS ? Specific Requirements ? North Carolina ? § 117.841...

  6. 33 CFR 117.841 - Smith Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    33 ? Navigation and Navigable Waters ? 1 ? 2014-07-01 ? 2014-07-01 ? false ? Smith Creek. ? 117.841 ? Section 117.841 ? Navigation and Navigable Waters ? COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ? BRIDGES ? DRAWBRIDGE OPERATION REGULATIONS ? Specific Requirements ? North Carolina ? § 117.841...

  7. 33 CFR 117.841 - Smith Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    33 ? Navigation and Navigable Waters ? 1 ? 2013-07-01 ? 2013-07-01 ? false ? Smith Creek. ? 117.841 ? Section 117.841 ? Navigation and Navigable Waters ? COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ? BRIDGES ? DRAWBRIDGE OPERATION REGULATIONS ? Specific Requirements ? North Carolina ? § 117.841...

  8. 33 CFR 117.841 - Smith Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    33 ? Navigation and Navigable Waters ? 1 ? 2012-07-01 ? 2012-07-01 ? false ? Smith Creek. ? 117.841 ? Section 117.841 ? Navigation and Navigable Waters ? COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ? BRIDGES ? DRAWBRIDGE OPERATION REGULATIONS ? Specific Requirements ? North Carolina ? § 117.841...

  9. Battle Creek Flooding May 2015, SD

    USGS Multimedia Gallery

    Following heavy rains, Battle Creek near Keystone (streamgage 06404000) peaked at about 1,500 cubic feet per second on May 24 and was about 1 foot below flood stage. This streamgage is operated in cooperation with the South Dakota Department of Natural Resources, Water Rights Division. Heavy rains i...

  10. Collaborative Monitoring in Walnut Creek, California1

    E-print Network

    Standiford, Richard B.

    management and participatory monitoring projects are based on the notion that conservation and resourceCollaborative Monitoring in Walnut Creek, California1 Heidi Ballard,2 Ralph Kraetsch,3 and Lynn Huntsinger2 Abstract In 1995 and 2000, a monitoring program was designed and implemented to track oak

  11. Gold Creek: Preserving an Environmental Studies Center.

    ERIC Educational Resources Information Center

    Brooks, Suzanne

    In response to a Board of Trustees request for information and recommendations concerning the future use of the Gold Creek property owned by the Los Angeles Community College District, this report emphasizes that the use of this site for instructional field experiences enhances the quality of environmental education for the district's diverse…

  12. The Secret of Bog Creek Farm

    NSDL National Science Digital Library

    This fictional story about a real Superfund site is available in English or Spanish. The Secret of Bog Creek Farm is a story about a real Superfund site where children learn through the eyes of local residents. The story explains how soil can become polluted and how it can be cleaned up by incineration.

  13. Breccia at the Apple Creek Formation

    USGS Multimedia Gallery

    USGS scientist Art Bookstrom hammers on limonite-stained breccia, cutting banded siltite of the Apple Creek Formation, exposed near the Uncle Sam portal of the Blackbird cobalt-copper mine, in the Salmon River Mountains of east-central Idaho....

  14. Buck CreekWatershed Protection Plan

    E-print Network

    State Soil and Water Conservation Board (Project 06-11) U.S. Environmental Protection Agency Developed the Texas State Soil and Water Conservation Board and U.S. Environmental Protection Agency. Buck Creek include: · Texas State Soil and Water Conservation Board · USDA-APHIS Wildlife Services · USDA Farm

  15. How Fern Creek Is Beating Goliath

    ERIC Educational Resources Information Center

    Donovan, Margaret; Galatowitsch, Patrick; Hefferin, Keri; Highland, Shanita

    2013-01-01

    The "David" is Fern Creek Elementary, a small urban school in Orlando, Florida, that serves an overwhelmingly disadvantaged student population. The "Goliaths" are the mountains of problems that many inner-city students face--poverty, homelessness, mobility, instability, limited parent involvement, and violent neighborhood…

  16. RECLAMATION OF INDIAN AND ABRAMS CREEKS

    E-print Network

    RECLAMATION OF INDIAN AND ABRAMS CREEKS IN GREAT SMOKY MOUNTAINS NATIONAL PARK SPECIAL SCIENTIFIC A. Seaton, Secretary Fish and Wildlife Service, Arnie J. Suomela, Commissioner THE RECLAMATION of Congress catalogue card for this publication is as follows: Lennon, Robert Earl, 1918- The reclamation

  17. FLOOD WARNING SYSTEM GEORGINA RIVER & EYRE CREEK

    E-print Network

    Greenslade, Diana

    FLOOD WARNING SYSTEM for the GEORGINA RIVER & EYRE CREEK This brochure describes the flood warning. It includes reference information which will be useful for understanding Flood Warnings and River Height Bulletins issued by the Bureau's Flood Warning Centre during periods of high rainfall and flooding. Eyre

  18. Beaver Creek below Linton, North Dakota

    USGS Multimedia Gallery

    On March 29, 2011, USGS personel were using a Acoustic Doppler Current Profiler (ADCP) to measure streamflow, depth, and velocity of the Beaver Creek below Linton, ND measuring the steamflow. The streamflow was 189 cubic feet per second and stage approximately 13.82 feet....

  19. Drywell corrosion stopped at Oyster Creek

    Microsoft Academic Search

    B. L. Lipford; J. C. Flynn

    1993-01-01

    This article describes the detection of corrosion on the drywell containment vessel of Oyster Creek Nuclear Plant and the application of a protective coating to repair the drywell. The topics of the article include drywell design features, identification of the problem, initial action, drywell corrosion, failure of cathodic protection, long-term repair, and repair results.

  20. Drywell corrosion stopped at Oyster Creek

    SciTech Connect

    Lipford, B.L. (MPR Associates, Washington, DC (United States)); Flynn, J.C.

    1993-11-01

    This article describes the detection of corrosion on the drywell containment vessel of Oyster Creek Nuclear Plant and the application of a protective coating to repair the drywell. The topics of the article include drywell design features, identification of the problem, initial action, drywell corrosion, failure of cathodic protection, long-term repair, and repair results.

  1. 33 CFR 117.709 - Cheesequake Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...709 Cheesequake Creek. (a) The draw of the S35 Bridge, at mile 0.0, at...November 30 from 7 a.m. to 8 p.m., the draw need only open on the hour. From 8 p.m. to 11 p.m. the draw shall open on signal. From 11...

  2. 33 CFR 117.903 - Darby Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...117.903 Darby Creek. (a) The draw of the CONRAIL Railroad Bridge, mile...the vertical clearance under the closed draw at all stages of the tide. The gages...controlled so that any delay in opening of the draw shall not exceed ten minutes...

  3. 33 CFR 117.709 - Cheesequake Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...709 Cheesequake Creek. (a) The draw of the S35 Bridge, at mile 0.0, at...November 30 from 7 a.m. to 8 p.m., the draw need only open on the hour. From 8 p.m. to 11 p.m. the draw shall open on signal. From 11...

  4. DEARY CREEK STUDY, LATAH COUNTY, IDAHO. 1979

    EPA Science Inventory

    In Water Year 1979, a water quality study was conducted on Mount Deary Creek in Latah County, Idaho (17060306) to determine the present water quality of the stream and to obtain background information to determine effluent limitations for the City of Deary. The survey involved t...

  5. CAMAS CREEK STUDY, CAMAS COUNTY, IDAHO. 1979

    EPA Science Inventory

    The National Eutrophication Survey on Magic Reservoir determined that Camas Creek in Camas County, Idaho (17040220) contributed roughly 45% of the total phosphorus load and 34% of the total nitrogen load into Magic Reservoir. From this finding, a water quality study was conducte...

  6. Campbell Creek Research Houses: A Transformational Impact

    E-print Network

    Oak Ridge National Laboratory

    array on the roof with 2.5 kW capacity Solar thermal water heating system Fluorescent/LED lighting efficiencies can be improved by using solar or HPWH technology. Solar is slightly more efficient as tested easily do. Manufacturers and Suppliers The following partners have contributed to the Campbell Creek

  7. 33 CFR 117.815 - Westchester Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...REGULATIONS Specific Requirements New York § 117.815 Westchester Creek...Bridge, mile 1.7, at the Bronx, New York, shall open on signal if at least...two-hour advance notice is given to the New York City Department of...

  8. 33 CFR 117.815 - Westchester Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...REGULATIONS Specific Requirements New York § 117.815 Westchester Creek...Bridge, mile 1.7, at the Bronx, New York, shall open on signal if at least...two-hour advance notice is given to the New York City Department of...

  9. 33 CFR 117.815 - Westchester Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...REGULATIONS Specific Requirements New York § 117.815 Westchester Creek...Bridge, mile 1.7, at the Bronx, New York, shall open on signal if at least...two-hour advance notice is given to the New York City Department of...

  10. 33 CFR 117.813 - Wappinger Creek.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.813 Wappinger Creek. The draw of the Metro-North Commuter railroad bridge, mile 0.0 at New Hamburg, need not be opened for the passage of vessels. However, the...

  11. 33 CFR 117.813 - Wappinger Creek.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.813 Wappinger Creek. The draw of the Metro-North Commuter railroad bridge, mile 0.0 at New Hamburg, need not be opened for the passage of vessels. However, the...

  12. 33 CFR 117.813 - Wappinger Creek.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.813 Wappinger Creek. The draw of the Metro-North Commuter railroad bridge, mile 0.0 at New Hamburg, need not be opened for the passage of vessels. However, the...

  13. 33 CFR 117.813 - Wappinger Creek.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.813 Wappinger Creek. The draw of the Metro-North Commuter railroad bridge, mile 0.0 at New Hamburg, need not be opened for the passage of vessels. However, the...

  14. 33 CFR 117.813 - Wappinger Creek.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...BRIDGES DRAWBRIDGE OPERATION REGULATIONS Specific Requirements New York § 117.813 Wappinger Creek. The draw of the Metro-North Commuter railroad bridge, mile 0.0 at New Hamburg, need not be opened for the passage of vessels. However, the...

  15. Grieving in the Muscogee Creek Tribe

    ERIC Educational Resources Information Center

    Walker, Andrea C.

    2008-01-01

    A qualitative, collective case study explores grieving in the Muscogee Creek tribe. Data from interviews with 27 participants, all adult members of the tribe, reveal tendencies in patterns of grieving. Commonalities include (a) individual strength and certainty of recovery; (b) focus on giving to others in the family and coping as a family unit;…

  16. Bereavement Rituals in the Muscogee Creek Tribe

    ERIC Educational Resources Information Center

    Walker, Andrea C.; Balk, David E.

    2007-01-01

    A qualitative, collective case study explores bereavement rituals in the Muscogee Creek tribe. Data from interviews with 27 participants, all adult members of the tribe, revealed consensus on participation in certain bereavement rituals. Common rituals included (a) conducting a wake service the night before burial; (b) never leaving the body alone…

  17. Pop Rocks Experiment 25 Pop rock packages

    E-print Network

    Benitez-Nelson, Claudia

    Pop Rocks Experiment Materials · 25 Pop rock packages · Four 9 inch balloons · Four 16 oz sodas at ingredients) · What other things explode or pop that you can think of? (balloons, tires, etc) · What makes the popping noise that you think of? (air escaping from the closed space) · Why do you think they pop

  18. Multiple Magmatic Events Over 40 Ma in the Fish Creek Mountains, North-central Great Basin, Nevada, USA

    NASA Astrophysics Data System (ADS)

    Cousens, B.; Henry, C. D.; Stevens, C.; Varve, S.

    2011-12-01

    The Fish Creek Mountains, located in north-central Nevada south of Battle Mountain, is a site of multiple igneous events ranging from ca. 35 Ma to 1 Ma, covering most of the igneous history of the Great Basin of the western United States. Such extended volcanic activity allows for documentation of mantle sources and petrogenetic processes over time. Beginning approximately 50 Ma, the Great Basin experienced a magmatic front that began migrating southwestward across southern Idaho, central Oregon and into northern Nevada and Utah. Intermediate, "arc-like" andesite and dacite dominated volcanic activity in northeastern Nevada between about 45 and 36 Ma. By 34 Ma, a northwest-trending belt of rhyolitic ash-flow calderas began to develop through central Nevada, the "ignimbrite flare-up". Volcanism then migrated westwards towards the Sierra Nevada. In north-central Nevada, the oldest lavas are ca. 35 Ma basaltic andesites through rhyolites that are exposed in the western Shoshone Range, the eastern Tobin Range, and the northern and eastern Fish Creek Mountains. Plagioclase-rich andesites, dacite intrusions, and volcanic breccias occur in a belt along the western side of the Fish Creek Mountains. The bulk of the Fish Creek Mountains is composed of the 24.7 Ma Fish Creek Mountains rhyolitic tuff that is largely confined to an undeformed caldera structure. The caldera and tuff are anomalously young compared to nearby felsic centers such as the Caetano caldera (33.8Ma) and Shoshone Range (39-35 Ma) and relative to the southwest to west magmatic migration. The basal tuff is unwelded, with abundant pumice and lithic (primarily volcanic) fragments but only rare crystals. Sanidine and smoky quartz phenocrysts become more abundant upsection and glassy fiamme (hydrated to devitrified) are common, but the abundance of lithic fragments diminishes. 16-15 Ma volcanic rocks of the Northern Nevada Rift are exposed in the Battle Mountain area, ranging in composition from subalkaine basalt to rhyolite and rare trachyte. These rocks are linked to the Columbia River flood basalt event. Along the northwestern margin of the Fish Creek Mountains and in the center of the caldera complex are exposed late Pliocene to Quaternary lava flows and cinder cones of the Buffalo Valley volcanic field. The Buffalo Valley volcanic rocks are alkalic basalts that are locally vesicular, with rare plagioclase and olivine phenocrysts as well as plagioclase megacrysts up to several centimeters in size. Trace element and isotopic characteristics are similar to those of the Pliocene-Pleistocene Lunar Craters volcanic field in central Nevada. Ongoing geochemical analyses will outline variations in mantle sources and post-melting processes in the multiple volcanic systems of north-central Nevada.

  19. Effects of uncertainty in rock-physics models on reservoir parameter estimation using marine seismic AVA and CSEM data

    E-print Network

    Ajo-Franklin, Jonathan

    Effects of uncertainty in rock-physics models on reservoir parameter estimation using marineMobil Upstream Research Company Summary This study investigates the effects of uncertainty in rock- physics and density using the Xu-White model. To account for errors in the rock-physics models, we use two methods

  20. Pine Creek Ranch, FY 2001 Annual Report.

    SciTech Connect

    Berry, Mark E.

    2001-11-01

    Pine Creek Ranch was purchased in 1999 by the Confederated Tribes of Warm Springs using Bonneville Power Administration Fish and Wildlife Habitat Mitigation funds. The 25,000 acre property will be managed in perpetuity for the benefit of fish and wildlife habitat. Major issues include: (1) Restoring quality spawning and rearing habitat for stealhead. Streams are incised and fish passage barriers exist from culverts and possibly beaver dams. In addition to stealhead habitat, the Tribes are interested in overall riparian recovery in the John Day River system for wildlife habitat, watershed values and other values such as recreation. (2) Future grazing for specific management purposes. Past grazing practices undoubtedly contributed to current unacceptable conditions. The main stem of Pine Creek has already been enrolled in the CREP program administered by the USDA, Natural Resource Conservation Service in part because of the cost-share for vegetation restoration in a buffer portion of old fields and in part because of rental fees that will help the Tribes to pay the property taxes. Grazing is not allowed in the riparian buffer for the term of the contract. (3) Noxious weeds are a major concern. (4) Encroachment by western juniper throughout the watershed is a potential concern for the hydrology of the creek. Mark Berry, Habitat Manager, for the Pine Creek Ranch requested the Team to address the following objectives: (1) Introduce some of the field staff and others to Proper Functioning Condition (PFC) assessments and concepts. (2) Do a PFC assessment on approximately 10 miles of Pine Creek. (3) Offer management recommendations. (4) Provide guidelines for monitoring.