West-directed flow of the West Antarctic Ice Sheet across Eastern Basin, Ross Sea during the Quaternary

Details West-directed flow of the West Antarctic Ice Sheet across Eastern Basin, Ross Sea during the Quaternary West-directed flow of the West Antarctic Ice Sheet across Eastern Basin, Ross Sea during the Quaternary

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004e%26psl.228..425b&link_type=abstract

Earth and Planetary Science Letters, Volume 228, Issue 3-4, p. 425-438.

Physics

Antarctic Ice Sheet, Antarctica, Ice Streams, Glacial Troughs, Seismic Stratigraphy, Ross Bank

Scientific paper

Detailed seismic stratigraphic correlations and contour mapping (time-structure and time-thickness) of near-surface units in Eastern Basin, Ross Sea, outer continental shelf suggest that strata outcropping at Ross Bank were deposited as a terminal moraine in association with west-directed advance of the West Antarctic Ice Sheet grounding zone from Marie Byrd Land. During the grounding event, there was a major shift from west-directed ice sheet flow to north-directed ice stream flow. Seismic correlation to age control at DSDP Leg 28 sites 271 and 272 suggests a pre-Last Glacial Maximum Quaternary age for this major grounding event.

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