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(Article of periodic en Anglais - 2000)

Document title

Evidence from Ar40/Ar39 ages of individual hornblende grains for varying Laurentide sources of iceberg discharges 22,000 to 10,500 yr B.P.

Authors(s) and Affiliation(s)

HEMMING S.R. ; BOND G.C. ; BROECKER W.S. ; SHARP W.D. ; KLAS-MENDELSON M. ;

Abstract

The abundance and lithic content of ice rafted detritus in glacial North Atlantic sediment cores vary abruptly on millenial time scales that have been correlated to Dansgaard-Oeschger cycles in the Greenland ice cores. There is growing evidence that various ice sheet outlets contributed increased iceberg fluxes at multiple discrete intervals, and the relative timing of iceberg discharges from different sources is important for understanding interactions between oceans and ice sheets. The AA. present a provenance study based on Ar40/Ar39 dates of individual hornblende grains from 20 samples. Discussion of the results

Source

Article of periodic

published at : Quaternary research / ISSN 0033-5894 / CODEN QRESAV

Editor : Elsevier, San Diego, CA - ETATS-UNIS (1970)

Millesime : 2000, vol. 54, no3 [pp. 372-383]

Bibliographic references : 53 ref.

Collation : Illustration ;

Language

Anglais

INIST-CNRS, Cote INIST : 15739

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2001.
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