A constraint to the Wisconsinan glacial history, Canadian Arctic Archipelago
作者:
Alan Taylor,
期刊:
Journal of Quaternary Science
(WILEY Available online 1988)
卷期:
Volume 3,
issue 1
页码: 15-18
ISSN:0267-8179
年代: 1988
DOI:10.1002/jqs.3390030104
出版商: John Wiley&Sons, Ltd
关键词: Canada;Queen Elizabeth Islands;permafrost;offshore;glacial history
数据来源: WILEY
摘要:
AbstractThick ice‐bearing permafrost is not observed today beneath the deeper channels of the central Queen Elizabeth Islands, Canadian Arctic Archipelago. Analysis of a precision temperature log recently obtained at an offshore well near Ellef Ringnes Island indicates that the thermal regime beneath the seabed is in equilibrium with today's marine environment. If thick permafrost similar to that observed on land today had existed in the Pleistocene in areas that are presently offshore, then such permafrost must have started melting no later than 25000 years ago in order to allow the present thermal regime to evolve. This suggests that the inter‐island channels must have been water‐filled at least by that
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