Nature and origin of ground ice, Sandhills Moraine, southwest Banks Island, Western Canadian Arctic
作者:
H. M. French,
D. G. Harry,
期刊:
Journal of Quaternary Science
(WILEY Available online 1988)
卷期:
Volume 3,
issue 1
页码: 19-30
ISSN:0267-8179
年代: 1988
DOI:10.1002/jqs.3390030105
出版商: John Wiley&Sons, Ltd
关键词: permafrost;ground ice;icy sediments;stratigraphy;moraine
数据来源: WILEY
摘要:
AbstractThe Sandhills Moraine is a Late Wisconsinan lateral moraine complex on southwest Banks Island. The occurrence of ice‐ablation landforms, ground ice slumps, kettle lakes and catastrophic lake drainage in winter suggests the presence of substantial bodies of massive ground ice. The distinctive hummocky topography of the Sandhills Moraine is thought to reflect partial melt‐out of this ice. Stratigraphic observations indicate that the ice is overlain irregularly and unconformably by glacigenic sediments, notably pebbly clay (till) and/or sandy gravels (outwash), while the ice itself possesses numerous and variable mineral inclusions, faults and foliations. Petrofabric analyses indicate a strongly preferred orientation to the ice crystals. It is suggested that these characteristics are best explained if the ground ice is interpreted as relict glacier
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