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

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, sugge...

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Bibliographic Details
Main Authors: Yeong Bae Seong, Hyoun Soo Lim, Ho Il Yoon, Yong Il Lee, Yeadong Kim, Lewis A. Owen
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Key Words
West Antarctica
South Shetland Islands
Late Quaternary
glacier
subglacial meltwater channel
moraine
Admiralty Bay
Fildes
Fildes peninsula
Maxwell Bay
Antarc*
Antarctica
Ice cap
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.1072
http://kgeography.or.kr/publishing/journal/41/05/01.pdf
Description
Summary: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~1000m-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.

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