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(Article of periodic en Anglais - 1980)

Document title

Upper cretaceous to quaternary sedimentary processes in the Bay of Biscay from textural, mineralogical, and coarse fraction studies

Authors(s) and Affiliation(s)

AUFFRET G. A. ; PASTOURET L. ;

Abstract

From the study the following aspects of the evolution of the sedimentary regime are characterized: 1establishment of an active bottom current circulation during the early Eocene, concomitant with a clear thermal stratification of the water masses| 2development of a highly fluctuating bottom current regime during the Oligocene, spicule-rich "contourites" being implaced during periods of active bottom currents| 3changes in the sedimentary regime at the early middle Miocene boundary characterized by decreasing bottom current and increasing sedimentation rates| 4active bottom current, decreasing dissolution and markel increase of the sedimentation rates in the early Pliocene, that contributed to active building of a sedimentary ridge at the foot of the margin| 5it appears that the lowermost Upper Cretaceous hiatus and the upper Eocene hiatus are related to changes in the physiographic (and hydrologic?) environment at an oceanic rather than regional scale.

Source

Article of periodic

published at : Publications du Centre National pour l'Exploitation des Océans. Recueil des travaux du Centre océanologique de Bretagne Brest

Editor :

Millesime : 1980, no8 [pp. 493-531]

Bibliographic references : 35 réf.

Language

Anglais

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