Age determination of sediment cores from the Weddell Sea

We report here the results of a study aimed at providing radiometric age control on glacial events in the Weddell Sea during the late Quaternary. Sediment cores from the eastern continental shelf, where the East Antarctic ice sheet was grounded, have recovered glacial-marine sediments resting on til...

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Bibliographic Details
Main Authors: Anderson, John B, Andrews, John T
Format: Dataset
Language:English
Published: PANGAEA 1999
Subjects:
032
037
052
2-19-1
3-17-1
3-7-1
GC
Glacier
Gravity corer
International Weddell Sea Oceanographic Expeditions
IWSOE68
IWSOE68-032
IWSOE68-037
IWSOE68-052
IWSOE70
IWSOE70-2-19-1
IWSOE70-3-17-1
IWSOE70-3-7-1
PC
Piston corer
Antarctic
East Antarctic Ice Sheet
Weddell
Weddell Sea
Antarc*
Ice Sheet
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.735653
https://doi.org/10.1594/PANGAEA.735653
Description
Summary:We report here the results of a study aimed at providing radiometric age control on glacial events in the Weddell Sea during the late Quaternary. Sediment cores from the eastern continental shelf, where the East Antarctic ice sheet was grounded, have recovered glacial-marine sediments resting on tills and the latter deposits predate the isotope stage 2 last glacial maximum. Sediment cores from the continental slope and rise sampled a prominent ice-rafted debris layer, and radiocarbon ages indicate that this ice-rafting event took place prior to 26 000 yr B.P. Thus, the combined data indicate that significant deglaciation of the Weddell Sea continental shelf took place prior to the last glacial maximum. Our data also suggest that the ice masses that border the Weddell Sea are more extensive than they were during the previous glacial minimum.

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