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A Preliminary Geomorphic Overview of Late Quaternary Glacier Fluctuations in the South Shetland Islands, West Antarctica  

Lim, Hyoun-Soo (Korea Polar Research Institute)
Yoon, Ho-Il (Korea Polar Research Institute)
Lee, Yong-Il (School of Earth and Environmental Sciences, Seoul National University)
Kim, Yea-Dong (Korea Polar Research Institute)
Owen Lewis A. (Department of Geology, University of Chicinnati)
Seong, Yeong-Bae (Department of Geology, University of Chicinnati)
Publication Information
Journal of the Korean Geographical Society / v.41, no.5, 2006 , pp. 513-526 More about this Journal
Abstract
The timing and extent of glaciations during the Late Quaternary in the South Shetland Islands, West Antarctica were defined using field mapping, geomorphic analysis and radiocarbon dating. Landforms of glacial erosion and deposition, in particular subglacial meltwater channel erosion, suggest that at least three glaciations occurred during the late Quaternary within the study region. During the global LGM, glacial troughs (such as Maxwell Bay and Admiralty Bay) were overdeepened by an ice stream moving south from $an\sim1000m-thick$ ice cap centered on the present-day continental shelf to the north. This ice was responsible for the subglacial meltwater channel erosion, and glacial polished and striated bedrock on the Fildes Peninsula. The recent local glaciations occurred about 2,000 years ago and during Little Ice Age (LIA). During these glaciations, glaciers were less extensive than the previous one and less erosive as a cold-based ice
Keywords
West Antarctica; South Shetland Islands; Late Quaternary; glacier; subglacial meltwater channel; moraine; striation; equilibrium line altitude;
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