The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution
Maintenance and Update Frequency: notPlanned Statement: Not applicable High-resolution marine sonar swath mapping, covering an area of ca. 33 km2 in the vicinity of the Windmill Islands (67° S, 110° E), Wilkes Land, east Antarctica, permits visualisation and description of the near-shore geomorpholo...
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Australian Ocean Data Network
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Online Access: | https://researchdata.edu.au/the-seafloor-geomorphology-sheet-evolution/1880568 https://pid.geoscience.gov.au/dataset/ga/90095 https://doi.org/10.1016/j.geomorph.2017.04.031 |
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ftands:oai:ands.org.au::1880568 2023-10-01T03:51:05+02:00 The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution CCARSON (custodian) Carson, C.J. (author) Commonwealth of Australia (Geoscience Australia) (owner) Commonwealth of Australia (Geoscience Australia) (pointOfContact) EGD (hasAssociationWith) Manager Client Services (distributor) Manager Client Services (custodian) Post, A.L. (author) Smith, J. (author) Walker, G. (author) Waring, P. (author) Spatial: westlimit=110; southlimit=-67; eastlimit=111; northlimit=-66 https://researchdata.edu.au/the-seafloor-geomorphology-sheet-evolution/1880568 https://pid.geoscience.gov.au/dataset/ga/90095 https://doi.org/10.1016/j.geomorph.2017.04.031 unknown Australian Ocean Data Network https://researchdata.edu.au/the-seafloor-geomorphology-sheet-evolution/1880568 2d6986d0-e7d7-f3a1-e053-12a3070ab364 https://pid.geoscience.gov.au/dataset/ga/90095 doi:10.1016/j.geomorph.2017.04.031 EGD Commonwealth of Australia (Geoscience Australia) geoscientificInformation External Publication Scientific Journal Paper Antarctic data Bathymetry Continental Shelf geomorphology marine survey AAT Marine Geoscience EARTH SCIENCES GEOLOGY Published_External publication ftands https://doi.org/10.1016/j.geomorph.2017.04.031 2023-09-04T22:27:57Z Maintenance and Update Frequency: notPlanned Statement: Not applicable High-resolution marine sonar swath mapping, covering an area of ca. 33 km2 in the vicinity of the Windmill Islands (67° S, 110° E), Wilkes Land, east Antarctica, permits visualisation and description of the near-shore geomorphology of the seafloor environment in unprecedented detail and provides invaluable insight into the ice-sheet history of the region. Mesoproterozoic metamorphic basement exhibits prominent sets of parallel northwest-trending linear fault sets that probably formed during fragmentation of eastern Gondwana during the Mesozoic. The fault systems appear to control regional coastal physiographic features and have, in places, been preferentially eroded and exploited by subsequent glacial activity. Possibly the earliest formed glacially-derived geomorphological elements are networks of sub-glacial meltwater channels which are preserved on bedrock platforms and ridges. Subtle glacial lineations and streamlined landforms record evidence of the westward expansion of the grounded, Law Dome ice sheet margin, probably during the late Pleistocene Last Glacial Maximum, the direction of which coincides with glacial striae on onshore crystalline bedrock outcrops. The most striking glacial geomorphological features are sets of arcuate ridges confined mostly within glacially excavated `U-shaped valleys, exploiting and developed along bedrock fault sets. These ridge sets are interpreted as `push moraines or grounding zone features, formed during episodic retreat of highly channelised, topographically controlled ice-streams following ice surging, possibly in response to local environmental forcing during the mid-late Holocene. Minor post-glacial marine sedimentation is preserved in several small (1 km2) `isolated marine basins with shallow seaward sills. Text Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land Windmill Islands Research Data Australia (Australian National Data Service - ANDS) Antarctic East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Geomorphology 292 1 15 |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
geoscientificInformation External Publication Scientific Journal Paper Antarctic data Bathymetry Continental Shelf geomorphology marine survey AAT Marine Geoscience EARTH SCIENCES GEOLOGY Published_External |
spellingShingle |
geoscientificInformation External Publication Scientific Journal Paper Antarctic data Bathymetry Continental Shelf geomorphology marine survey AAT Marine Geoscience EARTH SCIENCES GEOLOGY Published_External The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution |
topic_facet |
geoscientificInformation External Publication Scientific Journal Paper Antarctic data Bathymetry Continental Shelf geomorphology marine survey AAT Marine Geoscience EARTH SCIENCES GEOLOGY Published_External |
description |
Maintenance and Update Frequency: notPlanned Statement: Not applicable High-resolution marine sonar swath mapping, covering an area of ca. 33 km2 in the vicinity of the Windmill Islands (67° S, 110° E), Wilkes Land, east Antarctica, permits visualisation and description of the near-shore geomorphology of the seafloor environment in unprecedented detail and provides invaluable insight into the ice-sheet history of the region. Mesoproterozoic metamorphic basement exhibits prominent sets of parallel northwest-trending linear fault sets that probably formed during fragmentation of eastern Gondwana during the Mesozoic. The fault systems appear to control regional coastal physiographic features and have, in places, been preferentially eroded and exploited by subsequent glacial activity. Possibly the earliest formed glacially-derived geomorphological elements are networks of sub-glacial meltwater channels which are preserved on bedrock platforms and ridges. Subtle glacial lineations and streamlined landforms record evidence of the westward expansion of the grounded, Law Dome ice sheet margin, probably during the late Pleistocene Last Glacial Maximum, the direction of which coincides with glacial striae on onshore crystalline bedrock outcrops. The most striking glacial geomorphological features are sets of arcuate ridges confined mostly within glacially excavated `U-shaped valleys, exploiting and developed along bedrock fault sets. These ridge sets are interpreted as `push moraines or grounding zone features, formed during episodic retreat of highly channelised, topographically controlled ice-streams following ice surging, possibly in response to local environmental forcing during the mid-late Holocene. Minor post-glacial marine sedimentation is preserved in several small (1 km2) `isolated marine basins with shallow seaward sills. |
author2 |
CCARSON (custodian) Carson, C.J. (author) Commonwealth of Australia (Geoscience Australia) (owner) Commonwealth of Australia (Geoscience Australia) (pointOfContact) EGD (hasAssociationWith) Manager Client Services (distributor) Manager Client Services (custodian) Post, A.L. (author) Smith, J. (author) Walker, G. (author) Waring, P. (author) |
format |
Text |
title |
The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution |
title_short |
The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution |
title_full |
The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution |
title_fullStr |
The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution |
title_full_unstemmed |
The seafloor geomorphology of the Windmill Islands, Wilkes Land, East Antarctica: implications for regional ice-sheet evolution |
title_sort |
seafloor geomorphology of the windmill islands, wilkes land, east antarctica: implications for regional ice-sheet evolution |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.edu.au/the-seafloor-geomorphology-sheet-evolution/1880568 https://pid.geoscience.gov.au/dataset/ga/90095 https://doi.org/10.1016/j.geomorph.2017.04.031 |
op_coverage |
Spatial: westlimit=110; southlimit=-67; eastlimit=111; northlimit=-66 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(110.417,110.417,-66.350,-66.350) ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Antarctic East Antarctica Wilkes Land Windmill Islands Law Dome |
geographic_facet |
Antarctic East Antarctica Wilkes Land Windmill Islands Law Dome |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land Windmill Islands |
op_source |
EGD Commonwealth of Australia (Geoscience Australia) |
op_relation |
https://researchdata.edu.au/the-seafloor-geomorphology-sheet-evolution/1880568 2d6986d0-e7d7-f3a1-e053-12a3070ab364 https://pid.geoscience.gov.au/dataset/ga/90095 doi:10.1016/j.geomorph.2017.04.031 |
op_doi |
https://doi.org/10.1016/j.geomorph.2017.04.031 |
container_title |
Geomorphology |
container_volume |
292 |
container_start_page |
1 |
op_container_end_page |
15 |
_version_ |
1778531457238564864 |