Within the Sohm Abyssal Plain sand and coarse silt are major constituents of bottom deposits. These coarse layers are interstratified with clay. High impedence contrasts at the water-sediment interface and at textural breaks within the sediment section fa...

Spheres from mid-Pacific abyssal clays (0 to 500,000 yrs old), formed from particles that completely

... Title : Undrained Plane-Strain Expansion of a Cylindrical Cavity in Clay: A Simple Interpretation of the Pressuremeter Test,. ...

Spheres from mid-Pacific abyssal clays (0 to 500,000 yrs old), formed from particles that completely melted and subsequently recrystallized as they separated from their meteoroid bodies, or containing relict grains of parent meteoroids that did not experi...

The late Quaternary terrigenous sediments of the continental margin and abyssal plains of the western equatorial Atlantic consist predominantly of hemipelagic silty clay rich in organic detritus with interbeds of redeposited silts and sands; deposition wa...

The (87)Sr/(86)Sr ratios in some bulk abyssal and alpine peridotites are too high to be binary mixtures of depleted mantle and seawater components. The apparent excess, or "orphan," (87)Sr appears to be separated from its radioactive parent. Such observations were widely held to be analytical artifacts. Study of several occurrences of orphan (87)Sr shows that the orphan ...

The following are included that were generated in the research program on the structural behavior of clay tile walls: test procedure for out-of-plane full scale static testing of a hollow clay tile wall panel, ultimate strength calculations for out-of-plane air bag tests, test procedure for ...

The following are included that were generated in the research program on the structural behavior of clay tile walls: test procedure for out-of-plane full scale static testing of a hollow clay tile wall panel, ultimate strength calculations for out-of-plane air bag tests, test procedure for ...

The contents of seven major components (TiO2, Fe2O3, MgO, CaO, Na2O, K2O and P2O5) and 15 trace elements (Sc, V, Cr, Ni, Cu, Sr, Y, Zr, Ba, La, Ce, Nd, Eu, Yb and Th) were determined by ICP-AE spectrometry in 27 samples of manganese nodules, micronodules as well as abyssal clay collected by dredging from an area of nearly 1,9802 nautical miles in the ...

... Title : The History of Sedimentation and Abyssal Circulation on the ... Subject Categories : PHYSICAL AND DYNAMIC OCEANOGRAPHY GEOLOGY ...

... Accession Number : AD0238069. Title : THE GEOMORPHOLOGY OF ABYSSAL PLAINS IN THE NORTHEAST PACIFIC OCEAN. ...

... Title : Effects of Biological Activity by Abyssal Benthic Macroinvertebrates on a Sedimentary Structure in the Venezuela Basin,. ...

... Title : CERTAIN REGIONAL PROPERTIES OF THE ABYSSAL STRUCTURE OF THE EARTH'S CRUST IN THE TERRITORY OF THE USSR IN THE ...

Preparation and Properties of Recycled HDPE/Clay Hybrids Yong Lei,1 Qinglin Wu,1 Craig M. Clemons2 LEI, WU, AND CLEMONS #12;shape [Fig. 3(b)]. The diffraction peaks for the (110) and (200) planes of HDPE, AND CLEMONS #12;the two-step method to aid in exfoliation of the clay. However, the RHDPE/clay/CAPS hybrids ...

Threshold erosion velocities for plane beds of pelagic red clay were established by ten experimental runs in a recirculating salt-water flume. Even with water content as high as 82%, observable erosion of the sediment required a velocity equivalent to a b...

A method is outlined for estimating the immediate changes to the total and effective stresses in a saturated clay soil around a single driven pile. Pile installation is modelled as the undrained expansion of a cylindrical cavity under conditions of plane ...

The disturbance of a clay mass due to the installation of a driven pile is modelled as an undrained, cylindrical cavity expansion under conditions of plane strain. Using a numerical solution technique predictions are made of the stress changes and the exc...

Abyssal-hill faults are reactivated on the outer slope of trenches when they strike within 25� from trench parallel; otherwise, new faults form parallel to the trench. We use the observed transition angle (25�) and a three-dimensional failure analysis to determine the coefficient of friction on reactivated abyssal-hill faults. The stress state in the ...

The radionuclide sorption properties of a widely distributed abyssal red clay are being experimentally investigated using batch equilibration techniques. This paper summarizes sorption equilibrium data obtained when 0.68 N NaCl solutions containing either Tc, U, Pu, Am or Cm were contacted with samples of the red clay and also ...

Clay veins found in coal mines have caused numerous injuries and fatalities. These structures plague all phases of mining, including entry development, pillar recovery, and panel extraction. Clay veins also increase production costs and may disrupt or halt mining. The occurrence and origins of clay veins were investigated to determine ...

These detrimental aspects have prompted the Bureau of Mines to investigate the physical characteristics of and roof instability problems associated with clay veins. The investigators found that clay veins normally occur in more stable, less rapidly subsiding coal basins. Clay veins result when tensile stresses develop fissures that are ...

... The remainder of the basin includes a small triangular abyssal plain known as the Oman Abyssal Plain, a long, narrow abyssal plain between the ...

A summary of large-scale cyclic static tests of structural clay tile infilled frames is given. In-plane racking tests examined the effects of varying frame stiffness, varying infill size, infill offset from frame centerline, and single and double wythe infill construction. Out-of-plane tests examined infilled frame response to inertial ...

Recent Department of Energy requirements have led to a comprehensive evaluation of the industrial facilities at the Oak Ridge Y-12 Plant. The structures consist of simply connected steel frames infilled with structural clay tile walls. The objective of the evaluation was to determine the stability of the unreinforced infills, and whether they provide the lateral capacity ...

Many of the Y-12 Plant buildings are made of steel and concrete frames infilled with unreinforced clay tile walls; in many instances these infill walls comprise the major lateral load resisting capacity of the structures. A research program was begun to evaluate clay tile infill behavior. This test report describes testing done by USACERL as part of shake ...

The concentrations of seven major components (Ti, Fe, Mg, Ca, Na, K and P as oxides) and 15 trace elements (Sc, V, Cr, Ni, Cu, Sr, Y, Zr, Ba, La, Ce, Nd, Eu, Yb and Th) were determined by ICP-AE spectrometry in 27 samples of manganese nodules, micronodules and abyssal clay collected by dredging during the 1984 cruise of the R/V Akademik Alexandr Karpinski ...

The dispersion and gelation of clay suspensions have major impact on a number of industries, such as ceramic and composite materials processing, paper making, cement production, and consumer product formulation. To fundamentally understand controlling mechanisms of clay dispersion and gelation, it is necessary to study anisotropic surface charge properties ...

A University of Hawaii oceanographic cruise, Abyssal Hills 69, with the R/V MAHI, was carried out to study the association of manganese nodules with an abyssal hill. Manganese nodules from three dredge hauls on an abyssal hill located at 36 degrees N and ...

Language: English ...

Understanding how pelagic sediment has been eroded, transported, and deposited is critical to evaluating pelagic sediment records for paleoceanography. We use digital seismic reflection data from an Integrated Ocean Drilling Program site survey (AMAT03) to investigate pelagic sedimentation across the eastern-central equatorial Pacific, which represents the first comprehensive record published ...

Features evident on GLORIA sonographs from the Nares Abyssal Plain suggest a sediment dispersal pattern for turbidity currents that varies temporally and spatially, resulting in randomly distributed turbidite deposits in the distal abyssal plain east of 64/sup 0/W. Regional variations in backscatter intensities across the abyssal plain ...

Seventeen piston cores up to 13 m long were recovered from representative acoustic and lithologic environments of the Hatteras and Nares Abyssal Plains in the western North Atlantic. Compressional-wave velocities (corrected to in situ conditions) and bulk physical properties measured on the cores are used to characterize the acoustic framework of these areas. For correlation ...

... on Thomas (Library of Congress) Web site. ... This technical assessment report will be ... (AN). Descriptors : *WASTE MANAGEMENT, *ABYSSAL ZONES ...

... the Abyssal Seafloor: A Feasibility Study. ... 3) concentrations of trace elements and organic ... POLLUTION, FEASIBILITY STUDIES, CONCENTRATION ...

in northeastern North America and on Bermuda (inverted triangles), and a tentative scematic of the proposed in the interior of the Canadian craton to the North Atlantic abyssal plane near Bermuda, from as far south on the sea floor in a broad region between Bermuda and the continental shelf. 2. A temporary deployment of 4

In order to address the effect of prior out-of-plane damage on the in-plane behavior of unreinforced masonry infills, two full-scale (24 feet tall by 28 feet long) structural clay tile infills and one frame-only (no infilling) were constructed and tested. The infilled frame, consisting of two wide flange columns surrounded by masonry ...

Two steel frames with structural clay tile infills were tested under simulated seismic loads in both the out-of-plane and in-plane direction. Out-of-plane testing showed that infill panels separate from their bounding frame, and respond at their own natural frequency during a seismic excitation. Due to arching, the ...

The Florida Escarpment near 26/sup 0/N was surveyed with Deep-Two, Seabeam, and GLORIA in the area where chemosynthetic communities were discovered via ALVIN in the abyssal Gulf of Mexico. Seabeam bathymetry and GLORIA images indicate that the escarpment is a generally straight cliff with average slopes of about 45/sup 0/ from 2,200 to more than 3,250 m. The ...

A study is made of the problem of interpreting the results of Menard pressuremeter tests on soil in situ. In the test a cylindrical cavity is expanded by internal pressure, and the relation between applied pressure and cavity volume change is measured. It...

On the basis of theory and available experimental data, the influence of stress system (i.e., anisotropy, pore pressure response, rotation of principal planes and the intermediate principal stress) on the undrained shear strength of saturated clay, in ter...