Late Tertiary history of the Antarctic ice sheet: Evidence from the Dry Valleys
Late Tertiary history of the Antarctic ice sheet: Evidence from the Dry Valleys
复制标题
南极冰盖的晚第三纪历史：来自干谷的证据
DOI：
--
复制
发表时间：
1984
期刊：
影响因子：
--
通讯作者：
T. B. Kellogg
中科院分区：
文献类型：
--
作者：
G. Denton;M. Prentice;D. Kellogg;T. B. Kellogg
来自南极洲干谷的数据表明，当地冰盖的出口冰川在横贯南极山脉的两侧雕刻了原始山谷系统，而同时期的高山冰川则侵蚀了暴露的山谷间山脉。随后，厚厚的冰盖至少两次覆盖了横贯南极山脉，并向东北方向流过先前存在的主要山谷。最年轻的凌驾期晚于中新世中期至晚中新世早期，而最古老的凌驾期早于中新世晚期。我们认为，在翻覆时期，一个巨大的冰盖覆盖了南极洲的东部和西部。
Data from the Dry Valleys, Antarctica, suggest that outlet glaciers of a local ice cap carved primary valley systems on both flanks of the Transantarctic Mountains, while coeval alpine glaciers eroded exposed intervalley mountain ranges. Subsequently, a thick ice sheet overrode the Transantarctic Mountains at least twice, flowing northeastward across major pre-existing valleys. The youngest overriding episode postdated and the older episode antedated middle to early late Miocene time. We think that an extensive ice sheet covered East and West Antarctica during overriding episodes.