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Support for the Innuitian Ice Sheet in the Canadian High Arctic during the Last Glacial Maximum

✍ Scribed by John England

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 1004 KB
Volume: 13
Category: Article
ISSN: 0267-8179
DOI: 10.1002/(sici)1099-1417(199805/06)13:3<275::aid-jqs374>3.0.co;2-n

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✦ Synopsis

The extent of glacier ice in the Canadian High Arctic during the Last Glacial Maximum (LGM) has been debated for decades. One school proposed a regional Innuitian Ice Sheet whereas another proposed a smaller, non-contiguous Franklin Ice Complex. Research throughout western Nares Strait supports coalescent Innuitian and Greenland ice during the LGM, based on widespread glacial and marine deposits dated by 14 C and amino acid analyses. This coalescence likely promoted a vigorous regional ice flow westward across Ellesmere Island to Eureka Sound. Post-glacial emergence in Eureka Sound suggests a former ice thickness at least as great as that in Nares Strait (Ն 1 km). Recently, independent field studies elsewhere in the High Arctic also support an Innuitian Ice Sheet during the LGM. Collectively, these studies resolve a long-standing debate, and initiate new opportunities concerning the reconstruction of high-latitude palaeoenvironmental and palaeoclimatic change.

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