Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Piston cores"”.
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A late quaternary history of Agulhas-Benguela interactions from two sediment cores on the western continental slope of South Africa
… through the multiproxy study of two giant piston cores, MD962080 and MD962084, retrieved from the Agulhas Bank and Olifants River continental slopes of South Africa. The stable oxygen isotope record of the benthic foraminifer, Cibicidoides wuellerstorfi, and the planktonic taxon, …
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Applications of time series analysis to geophysical data
… the other principal response tunction. A set of piston cores from the northeast Atlantic Ocean are used to construct paleomagnetic time series covering the interval 25-127 kybp. Stratigraphic control is provided by counts of planktonic toraminifera, and empirical orthogonal function analysis …
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Late quaternary sedimentation in the Eastern Angola Basin
… through the Congo River and canyon systems. Piston cores from the continental rise revealed major fluctuations in the surface oceanographic conditions, primary productivity, and near-bottom depositional environment during the late Quaternary. Sediments deposited during glacial intervals …
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Organic geochemistry of an oil and gas seep in northern Gulf of Mexico sediments
… slope of the northwestern Gulf of Mexico nine piston cores were recovered which had visible liquid organic deposits. In three of the cores deposits were observed concentrated in oblique fracture planes. Other occurrences included large deposits as liquid veins and smaller disseminated pockets …
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3-D Numerical Modeling of Turbidity Currents
… of the Niger Delta. Bathymetric data and seven piston cores were collected from the study site. Detailed analyses of the core data provided the grain size distribution for different beds within each core. Because the flow parameters and conditions of recent events that formed this modern …
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Sedimentary processes on the continental slope off New England
… experiments, studies of surface sediments, and piston cores were combined to form the basis for understanding the sedimentary processes which control transportation, deposition, and erosion of sediments, and the geomorphic features of the continental slope. Gravitational processes (slumping, …
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Sedimentation on a mixed siliciclastic/carbonate continental margin over decadal to millennial timescales: Gulf of Papua
… flow and possible turbidity-currents. For the cores located between shelf edge and lower slope, biodiffusion coefficients and mixing depths exhibit a decreasing trend with increasing water depth. Using a two-layer model, biodiffusion coefficients in these cores are in the range of 0.007-60 cm2 …
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Megaturbidites and the late Quaternary regional sedimentology of the eastern and central Mediterranean Sea
… profiles and as graded sand and mud beds in long-piston cores. Of particular interest are 1) the Herodotus Basin Megaturbidite (HBM), dated at approximately 27,000 years and with a volume in the order of 400 km<sup>3</sup> and 2) the bi-partite Pantelleria Trough Megabed of the Central …
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A Glacial Sedimentary System in Northwest Spitzbergen
… terrestrial and marine sediments. Thirty-four piston cores were taken from two series of linked lakes in Signedalen, fed by three small cirque glaciers. Six further cores were taken from the fjord inlet, Signehamna, into which meltwater from the linked glacier-fed lakes and a further two …