A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica.
Thc morphology of the Lichen Hills in the upper section of Rennick Glacier, Victoria Land, Antarctica, is summarised as follows: (a) a top surface on the volcanic rocks with scattered erratic blocks; (b) an exhumed Kukri Peneplain, sculptured with roches moutonnées with striae and crescentic gouges...
Published in: | Annals of Glaciology |
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Language: | English |
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1999
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Online Access: | http://hdl.handle.net/11568/168279 https://doi.org/10.3189/172756499781821463 |
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ftunivpisairis:oai:arpi.unipi.it:11568/168279 2023-11-12T04:01:39+01:00 A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. MENEGHEL M. BONDESAN A. OROMBELLI G. SALVATORE, MARIA CRISTINA Meneghel, M. Bondesan, A. Salvatore, MARIA CRISTINA Orombelli, G. 1999 STAMPA http://hdl.handle.net/11568/168279 https://doi.org/10.3189/172756499781821463 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000086691400040 volume:29 firstpage:225 lastpage:230 numberofpages:6 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/11568/168279 doi:10.3189/172756499781821463 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0033494346 glacier retreat glaciology Last Glacial Maximum Modeling Rennick Glacier Victoria Land Antarctica info:eu-repo/semantics/article 1999 ftunivpisairis https://doi.org/10.3189/172756499781821463 2023-10-17T21:36:08Z Thc morphology of the Lichen Hills in the upper section of Rennick Glacier, Victoria Land, Antarctica, is summarised as follows: (a) a top surface on the volcanic rocks with scattered erratic blocks; (b) an exhumed Kukri Peneplain, sculptured with roches moutonnées with striae and crescentic gouges on which lie moraines and patches of drin of mainly volcanic rocks; (c) a granitic bedrock eroded by glaciers into sharp peaks and cirques, on top of which there is a glacial drift attributable to ancient blue-ice areas higher than those obscrved at present and which may be correlated with the Terra Nova drift (Late Wisconsin); (d) various Holocene ice-cored moraines that are pushed to the lee side of the nunataks and are often bandecl in strips of clifferent lithology. The banels of the Holocene moraines are related to the rock complexes that became exposed from the ice during the lowering of the surface of the glacier. Analysis of the lithology and pattern of the supraglacial debris, as well as of the blue-ice areas, allows us to construct a depositional model for the moraines, and to relate the glacial drift to blue-ice areas existing since the Last Glacial Maximum (LGM). The proposed model shows the different stages of recession of upper Rennick Glacier that are also valid for similar situations observed in northern Victoria Land. A surface lowering of upper Rennick Glacier of several hundred metres shows that significant changes have occurred at the Pacific edlge of the East Antarctic ice sheet since the LGM. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Rennick Glacier Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa Antarctic East Antarctic Ice Sheet Lichen Hills ENVELOPE(162.000,162.000,-73.300,-73.300) Pacific Rennick ENVELOPE(161.500,161.500,-72.000,-72.000) Rennick Glacier ENVELOPE(160.750,160.750,-70.500,-70.500) Victoria Land Annals of Glaciology 29 225 230 |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
glacier retreat glaciology Last Glacial Maximum Modeling Rennick Glacier Victoria Land Antarctica |
spellingShingle |
glacier retreat glaciology Last Glacial Maximum Modeling Rennick Glacier Victoria Land Antarctica MENEGHEL M. BONDESAN A. OROMBELLI G. SALVATORE, MARIA CRISTINA A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. |
topic_facet |
glacier retreat glaciology Last Glacial Maximum Modeling Rennick Glacier Victoria Land Antarctica |
description |
Thc morphology of the Lichen Hills in the upper section of Rennick Glacier, Victoria Land, Antarctica, is summarised as follows: (a) a top surface on the volcanic rocks with scattered erratic blocks; (b) an exhumed Kukri Peneplain, sculptured with roches moutonnées with striae and crescentic gouges on which lie moraines and patches of drin of mainly volcanic rocks; (c) a granitic bedrock eroded by glaciers into sharp peaks and cirques, on top of which there is a glacial drift attributable to ancient blue-ice areas higher than those obscrved at present and which may be correlated with the Terra Nova drift (Late Wisconsin); (d) various Holocene ice-cored moraines that are pushed to the lee side of the nunataks and are often bandecl in strips of clifferent lithology. The banels of the Holocene moraines are related to the rock complexes that became exposed from the ice during the lowering of the surface of the glacier. Analysis of the lithology and pattern of the supraglacial debris, as well as of the blue-ice areas, allows us to construct a depositional model for the moraines, and to relate the glacial drift to blue-ice areas existing since the Last Glacial Maximum (LGM). The proposed model shows the different stages of recession of upper Rennick Glacier that are also valid for similar situations observed in northern Victoria Land. A surface lowering of upper Rennick Glacier of several hundred metres shows that significant changes have occurred at the Pacific edlge of the East Antarctic ice sheet since the LGM. |
author2 |
Meneghel, M. Bondesan, A. Salvatore, MARIA CRISTINA Orombelli, G. |
format |
Article in Journal/Newspaper |
author |
MENEGHEL M. BONDESAN A. OROMBELLI G. SALVATORE, MARIA CRISTINA |
author_facet |
MENEGHEL M. BONDESAN A. OROMBELLI G. SALVATORE, MARIA CRISTINA |
author_sort |
MENEGHEL M. |
title |
A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. |
title_short |
A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. |
title_full |
A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. |
title_fullStr |
A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. |
title_full_unstemmed |
A model of the glacial retreat of upper Rennick Glacier, Victoria Land, Antarctica. |
title_sort |
model of the glacial retreat of upper rennick glacier, victoria land, antarctica. |
publishDate |
1999 |
url |
http://hdl.handle.net/11568/168279 https://doi.org/10.3189/172756499781821463 |
long_lat |
ENVELOPE(162.000,162.000,-73.300,-73.300) ENVELOPE(161.500,161.500,-72.000,-72.000) ENVELOPE(160.750,160.750,-70.500,-70.500) |
geographic |
Antarctic East Antarctic Ice Sheet Lichen Hills Pacific Rennick Rennick Glacier Victoria Land |
geographic_facet |
Antarctic East Antarctic Ice Sheet Lichen Hills Pacific Rennick Rennick Glacier Victoria Land |
genre |
Antarc* Antarctic Antarctica Ice Sheet Rennick Glacier Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Rennick Glacier Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000086691400040 volume:29 firstpage:225 lastpage:230 numberofpages:6 journal:ANNALS OF GLACIOLOGY http://hdl.handle.net/11568/168279 doi:10.3189/172756499781821463 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0033494346 |
op_doi |
https://doi.org/10.3189/172756499781821463 |
container_title |
Annals of Glaciology |
container_volume |
29 |
container_start_page |
225 |
op_container_end_page |
230 |
_version_ |
1782332967018823680 |