Glaciomarine sedimentation and palaeo-glacial setting of Maxwell Bay and its tributary embayment, Marian Cove, South Shetland Islands, West Antarctica SCIE SCOPUS

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Title
Glaciomarine sedimentation and palaeo-glacial setting of Maxwell Bay and its tributary embayment, Marian Cove, South Shetland Islands, West Antarctica
Author(s)
Yoon, HI; Han, MW; Park, BK; Oh, JK; Chang, SK
Publication Year
1997-08
Abstract
High-resolution (3.5 kHz and multi-channel) seismic profiles and piston cores were collected from Maxwell Bay and its tributary embayment, Marian Cove, in the South Shetland Islands, Antarctica, during the Korea Antarctic Research Program (1992/93 and 1995/96) to elucidate the glaciomarine sedimentation processes and recent glacial history of the area. Seismic data from Maxwell Bay reveal a rugged bay margin and flattened basin floor covered with well-stratified hemipelagic muds. On the base-of-slope, acoustically transparent debris flows occur, indicating downslope resedimentation of glaciomarine sediments. Despite the subpolar and ice-proximal settings of Marian Cove, the seafloor is highly rugged with a thin sediment drape, suggesting That much of the area has been recently eroded by glaciers. Sediment cores from the cove penetrated three distinct fining-upward lithofacies: (1) basal till in the lower part of the core, accumulated just seaward of the grounding line of the tidewater glacier; (2) interlaminated sand and mud in the middle part, deposited in ice-proximal zone by a combination of episodic subglacial meltwater inflow and iceberg dumping; and (3) pebbly mud in the upper part, deposited in ice-distal zone by both surface meltwater plume and ice-rafting from the glacier front. A reconstruction of the glacial history of these areas since the late glacial maximum shows an ice sheet filling Maxwell Bay in late Wisconsin time and grounding of the tidewater glacier in Marian Cove until about 1300 yr BP. (C) 1997 Elsevier Science B.V.
ISSN
0025-3227
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/6366
Bibliographic Citation
MARINE GEOLOGY, v.140, no.3-4, pp.265 - 282, 1997
Publisher
ELSEVIER SCIENCE BV
Subject
BRANSFIELD STRAIT; WEDDELL SEA; ICE-SHEET; ACCUMULATION; TRANSPORT; PENINSULA; FJORDS; ALASKA; SHELF; WATER
Keywords
glaciomarine sedimentation; Maxwell Bay; South Shetland Islands
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCIENCE BV
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