Pared-down landscapes in Antarctica
The frigid-arid climate that now prevails in ice-free parts of Victoria Land, Antarctica, inhibits glacial erosion. If certain landscapes, more or less remote from the great troughs of outlet glaciers, have been glaciated in the past, as seems very probable, landforms that resulted from glaciation h...
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ftunivwaikato:oai:researchcommons.waikato.ac.nz:10289/9180 2023-05-15T14:00:59+02:00 Pared-down landscapes in Antarctica Cotton, C.A. Wilson, A.T. 1971 application/pdf https://hdl.handle.net/10289/9180 en eng Waikato Geological Society, The University of Waikato Earth Science Journal Cotton, C.A. & Wilson, A.T. (1971). Pared-down landscapes in Antarctica. Earth Science Journal, 5(1), 1-15. https://hdl.handle.net/10289/9180 © 1971 Waikato Geological Society, The University of Waikato. All items in Research Commons are provided only to permit fair dealing for the purposes of research or private study. They are protected by copyright with all rights reserved unless otherwise indicated. Journal Article 1971 ftunivwaikato 2022-03-29T15:13:50Z The frigid-arid climate that now prevails in ice-free parts of Victoria Land, Antarctica, inhibits glacial erosion. If certain landscapes, more or less remote from the great troughs of outlet glaciers, have been glaciated in the past, as seems very probable, landforms that resulted from glaciation have been replaced by surfaces of different origin. A widespread landscape glaciation was probably contemporaneous with the excavation of large cirques which still survive in mountain summit areas. Replacement of glaciated landforms by others, in a general paring down of the land surface to forms of moderate relief, seems to have resulted from the process of gravity removal of debris from precipitous rock outcrops that were retreating because of disintegration by salt weathering and were eventually eliminated, in most cases, so that the landscape became a mosaic of smooth denudation slopes inclined at 33° to 350. In the Darwin Mountains ice-free area (80ºS) an advanced stage of such denudation with respect to a base level some 400 m above the present level of surrounding glaciers has produced some pyramidal landforms. Just above the present ice level, however, narrow Richter denudation slopes that border weathering rock faces are at only a juvenile stage of development. Thus the ice level appears to have stood alternately at about its present position and 400 m higher in Pleistocene interglacials and glacial ages respectively. The higher ice levels must have been due to extensions of the ice sheet seaward caused by groundings of the shelf ice during low glacio-eustatic stands of sea level Article in Journal/Newspaper Antarc* Antarctica Ice Sheet Victoria Land The University of Waikato: Research Commons Victoria Land Darwin Mountains ENVELOPE(156.250,156.250,-79.850,-79.850) |
institution |
Open Polar |
collection |
The University of Waikato: Research Commons |
op_collection_id |
ftunivwaikato |
language |
English |
description |
The frigid-arid climate that now prevails in ice-free parts of Victoria Land, Antarctica, inhibits glacial erosion. If certain landscapes, more or less remote from the great troughs of outlet glaciers, have been glaciated in the past, as seems very probable, landforms that resulted from glaciation have been replaced by surfaces of different origin. A widespread landscape glaciation was probably contemporaneous with the excavation of large cirques which still survive in mountain summit areas. Replacement of glaciated landforms by others, in a general paring down of the land surface to forms of moderate relief, seems to have resulted from the process of gravity removal of debris from precipitous rock outcrops that were retreating because of disintegration by salt weathering and were eventually eliminated, in most cases, so that the landscape became a mosaic of smooth denudation slopes inclined at 33° to 350. In the Darwin Mountains ice-free area (80ºS) an advanced stage of such denudation with respect to a base level some 400 m above the present level of surrounding glaciers has produced some pyramidal landforms. Just above the present ice level, however, narrow Richter denudation slopes that border weathering rock faces are at only a juvenile stage of development. Thus the ice level appears to have stood alternately at about its present position and 400 m higher in Pleistocene interglacials and glacial ages respectively. The higher ice levels must have been due to extensions of the ice sheet seaward caused by groundings of the shelf ice during low glacio-eustatic stands of sea level |
format |
Article in Journal/Newspaper |
author |
Cotton, C.A. Wilson, A.T. |
spellingShingle |
Cotton, C.A. Wilson, A.T. Pared-down landscapes in Antarctica |
author_facet |
Cotton, C.A. Wilson, A.T. |
author_sort |
Cotton, C.A. |
title |
Pared-down landscapes in Antarctica |
title_short |
Pared-down landscapes in Antarctica |
title_full |
Pared-down landscapes in Antarctica |
title_fullStr |
Pared-down landscapes in Antarctica |
title_full_unstemmed |
Pared-down landscapes in Antarctica |
title_sort |
pared-down landscapes in antarctica |
publisher |
Waikato Geological Society, The University of Waikato |
publishDate |
1971 |
url |
https://hdl.handle.net/10289/9180 |
long_lat |
ENVELOPE(156.250,156.250,-79.850,-79.850) |
geographic |
Victoria Land Darwin Mountains |
geographic_facet |
Victoria Land Darwin Mountains |
genre |
Antarc* Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctica Ice Sheet Victoria Land |
op_relation |
Earth Science Journal Cotton, C.A. & Wilson, A.T. (1971). Pared-down landscapes in Antarctica. Earth Science Journal, 5(1), 1-15. https://hdl.handle.net/10289/9180 |
op_rights |
© 1971 Waikato Geological Society, The University of Waikato. All items in Research Commons are provided only to permit fair dealing for the purposes of research or private study. They are protected by copyright with all rights reserved unless otherwise indicated. |
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1766270395152859136 |