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| Thiede, J. |
| The depositional environments along Pacific island margins have been used as analogs to elucidate depositional processes along continental margins, controlled by their tectonic and volcanic, climatic, hydrographic and biologic evolution. Intervals of low eustatic sea levels led to be displacement of shallow water sediments (with their contents of neritic fossils) into the adjacent deep-sea basins. Eight erosional pulses when neritic fossils were displaced into the deep-sea, can be discerned in the central Pacific during the past 130 MY. Velocities of oceanic bottom water currents which affected island margin sedimentation, were slow in the Cretaceous Pacific, but they eroded sediments in intermediate water depths since Maastrichtian time. Mechanical... |
| Tipo: Text |
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| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/00245/35673/34181.pdf |
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| Pastouret, L; Chamley, H; Delibrias, G; Duplessy, Jc; Thiede, J. |
| The oxygen isotopes ratios of benthic foraminifera and detailed radiocarbon ages of the organic matter of an over 15 m long sediment core from the outer Niger delta allow us to date the oxygen isotope stage boundaries 1,2 to 11500 (+ 650) years BP. 2/3 to approximately 23000 (+ 2000) years BP. The composition of the predominantly terrigenous clays and accessory pelagic fossils reflects the evolution of the climate over the southwestern Sahel zone and the response of the Eastern Tropical Atlantic to these climatic fluctuations during the Late Quaternary. [NOT CONTROLLED OCR] |
| Tipo: Text |
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| Ano: 1978 |
URL: http://archimer.ifremer.fr/doc/1978/publication-5227.pdf |
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