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

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Title
A Preliminary Geomorphic Overview of Late Quaternary Glacier Fluctuations in the South Shetland Islands, West Antarctica
Other Titles
서남극 남쉐틀랜드 군도의 제4기 후기 빙하 활동의 지형학적 고찰
Authors
Seong, Y.B.
Lim, Hyoun Soo
Kim, Yeadong
Lewis A. Owen
Lee, Yong Il
Yoon, Ho Il
Subject
Physical Geography
Keywords
West Antarctica; South Shetland Islands; Late Quaternary; glacier; subglacial meltwater channel; moraine; striation; equilibrium line altitude.
Issue Date
2006
Citation
Seong, Y.B., et al. 2006. "A Preliminary Geomorphic Overview of Late Quaternary Glacier Fluctuations in the South Shetland Islands, West Antarctica". Journal of the Korean Geographical Society, 41(5): 513-526.
Abstract
The timing and extent of glaciations during the Late Quaternary in the South Shetland Islands, WestAntarctica were defined using field mapping, geomorphic analysis and radiocarbon dating. Landforms of glacialerosion and deposition, in particular subglacial meltwater channel erosion, suggest that at least three glaciationsoccurred during the late Quaternary within the study region. During the global LGM, glacial troughs (such as MaxwellBay and Admiralty Bay) were overdeepened by an ice stream moving south from an~1000m-thick ice cap centered onthe 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 2,000years ago and during Little Ice Age (LIA). During these glaciations, glaciers were less extensive than the previous oneand less erosive as a cold-based ice.
URI
http://repository.kopri.re.kr/handle/201206/6683
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