La campagne de forage ≪ Leg ODP 172 ≫ sur la marge continentale nord-ouest Atlantique: des résultats préliminaires prometteurs. - The ODP leg 172 on the northwest Atlantic continental margin: preliminary results

Leg 172 achieved or exceeded most of its initial objectives. At all sites, high sedimentation rates throughout the Pleistocene allowed the precise tracking of ocean and climate changes such as the evolution to the 100 ka world from the 40 ka world. Sequences which extended to the Middle Pliocene wer...

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Bibliographic Details
Published in:Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science
Main Authors: TERNOIS Y., CORTIJO E., SICRE M.A., KEIGWIN L., ACTON G., RIO, DOMENICO
Other Authors: Ternois, Y., Cortijo, E., Sicre, M. A., Keigwin, L., Rio, Domenico, Acton, G.
Format: Article in Journal/Newspaper
Language:French
Published: Elsevier Ltd 1999
Subjects:
Clathrate
Palaeoceanography
Palaeoclimatology
Palaeomagnetism
Northwest Atlantic
Online Access:http://hdl.handle.net/11577/113740
https://doi.org/10.1016/S1251-8050(99)80143-8
Description
Summary:Leg 172 achieved or exceeded most of its initial objectives. At all sites, high sedimentation rates throughout the Pleistocene allowed the precise tracking of ocean and climate changes such as the evolution to the 100 ka world from the 40 ka world. Sequences which extended to the Middle Pliocene were recovered at several sites and will permit the study of the origin of the Northern Hemisphere glaciations. Millenial and perhaps centennial-scale climatic changes should be resolvable at some sites. Records of the Earth's magnetic field provide some high resolution signals with previously unseen variability. Preliminary shipboard results have also brought new insights about the geographic extent of gas hydrates, and new definitions of first and last occurrences of foraminiferal datum.

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