Results 211 to 220 of about 661,384 (261)

Three-dimensional imaging of sediment cores

open access: yesGeophysical Research Abstracts, 2017
Deprez, Maxim   +4 more
openaire   +2 more sources

Metal bioavailability and toxicity through a sediment core

Environmental Pollution, 2002
Sediment cores from Richard Lake near Sudbury, Ontario, were sectioned and analyzed for total metal content, plus metal bioavailability and toxicity to Hyalella azteca (after equilibration with oxygenated overlying water). Strong and similar sediment profiles were observed for Cd, Co, Cu and Ni in the sediment.
U Borgmann, W P Norwood
exaly   +3 more sources

Sediments at the Top of Earth's Core

Science, 2000
Unusual physical properties at the core-mantle boundary have been inferred from seismic and geodetic observations in recent years. We show how both types of observations can be explained by a layer of silicate sediments, which accumulate at the top of the core as Earth cools.
B A, Buffett, E J, Garnero, R, Jeanloz
openaire   +2 more sources

There is no 1954 in that core! Interpreting sedimentation rates and contaminant trends in marine sediment cores

Marine Pollution Bulletin, 2012
Marine sediment preserves a useful archive for contaminants and other properties that associate with particles. However, biomixing of sediments can smear the record on a scale of years to thousands of years, depending on sedimentation rate and on the depth and vigour of mixing within a particular sediment.
S C, Johannessen, R W, Macdonald
openaire   +2 more sources

Gravity coring instrument and mechanics of sediment coring

Geological Society of America Bulletin, 1941
A gravity-type coring apparatus, which is used on the research vessel E. W. Scripps of the Scripps Institution of Oceanography for taking sediment samples of the ocean floor, is described. With this instrument more than 200 cores have been taken in many types of sediment.
K. O. EMERY, R. S. DIETZ
openaire   +1 more source

Siberian Sediment Cores

Science, 1998
With regard to the report “Lake Baikal record of continental climate response to orbital insolation during the past 5 million years” by D. F. Williams et al . (7 Nov., [p. 1114][1]), I would like to point out that the data set of diatom abundance (presented in figure 1, column E, [p. 1115][1])
openaire   +1 more source

Ocean sediment coring program and marine sedimentation

Reviews of Geophysics, 1975
During the past 4 years the work surrounding the National Science Foundation Ocean Sediment Coring Program Deep Sea Drilling Project has so dominated the field of marine sedimentation as to be virtually identical with it.The Deep Sea Drilling Project (DSDP) is funded by the National Science Foundation under contract with the University of California ...
openaire   +1 more source

Monitoring sedimentation by radiographic core-to-core correlation

Geo-Marine Letters, 2001
Spatial and temporal variations in sedimentation rate and the formation of cyclic and event types of stratification have been identified by the correlation of sedimentation units between sediment cores, which were sampled on the same day during different seasons and years, as well as before and after specific events.
openaire   +1 more source

Mixing, sedimentation rates and age dating for sediment cores

Marine Geology, 1982
Abstract Analytic solutions to the advection-diffusion equation useful as a guide for the interpretation of mixing, sedimentation rate and age dating effects in sediment cores have been derived. Various simplified mixing models appropriate to 14 C and 210 Pb measurements have been considered.
openaire   +1 more source

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