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

被引：12

作者：

Bart, PJ ^{[1
]}

机构：

[1] Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 2004年 / 228卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

Antarctic Ice Sheet; Antarctica; ice streams; glacial troughs; seismic stratigraphy; Ross Bank;

D O I：

10.1016/j.epsl.2004.10.014

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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 Quaternay age for this major grounding event. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：425 / 438

页数：14

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