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Does the late Pliocene change in the architecture of the Antarctic margin correspond to the transition to the modern Antarctic Ice Sheet?

Open-File Report 2007-1047-SRP-021

By:
and
DOI: 10.3133/ofr20071047SRP021

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Abstract

We observe in 6 key sectors of East and West Antarctica continental margin a change in the geometry of the sedimentary deposits which is characterized by: margin-wide erosion and subsequent progradation on the continental shelf; downlap on the continental slope; major mass wasting deposits on the continental rise. The change occurs in the late Neogene in all sectors, though some natural variation exists, and the stratigraphic position is not obvious for every margin. The change is apparently synchronous and dated about 3 Ma in Antarctic Peninsula and Prydz Bay margins and broadly concomitant in the others sectors. This suggests a common driving force, which we suggest to be the transition of the Antarctic ice sheet regime from polythermal to present polar cold, dry-based conditions

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Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Does the late Pliocene change in the architecture of the Antarctic margin correspond to the transition to the modern Antarctic Ice Sheet?
Series title:
Open-File Report
Series number:
2007-1047-SRP-021
DOI:
10.3133/ofr20071047SRP021
Year Published:
2007
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Description:
5 p.
Larger Work Type:
Report
Larger Work Subtype:
USGS Numbered Series
Larger Work Title:
Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007
Other Geospatial:
Antarctica
Additional Online Files(Y/N):
N