Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica
The Transantarctic Mountains inland of Terra Nova Bay exhibit four major landsapces. 1) The first type consists of deep troughs propagated inland by headward cutting. The lower portions of these troughs form ice-covered fjords, where present-day grounding lines extend inland beneath outlet glaciers....
Main Authors: | , , |
---|---|
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1990
|
Subjects: | |
Online Access: | http://hdl.handle.net/11568/12167 |
id |
ftunivpisairis:oai:arpi.unipi.it:11568/12167 |
---|---|
record_format |
openpolar |
spelling |
ftunivpisairis:oai:arpi.unipi.it:11568/12167 2024-04-21T07:51:16+00:00 Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica OROMBELLI G DENTON G. H. BARONI, CARLO Orombelli, G Baroni, Carlo Denton, G. H. 1990 STAMPA http://hdl.handle.net/11568/12167 eng eng volume:13 issue:2 firstpage:139 lastpage:163 numberofpages:25 journal:GEOGRAFIA FISICA E DINAMICA QUATERNARIA http://hdl.handle.net/11568/12167 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0025524442 Cenozoic Climate change Glacial history landscape analysi East Antarctic Ice Sheet Pleistocene Holocene Terra Nova Bay Victoria Land Antarctica info:eu-repo/semantics/article 1990 ftunivpisairis 2024-03-28T01:23:17Z The Transantarctic Mountains inland of Terra Nova Bay exhibit four major landsapces. 1) The first type consists of deep troughs propagated inland by headward cutting. The lower portions of these troughs form ice-covered fjords, where present-day grounding lines extend inland beneath outlet glaciers. 2) Well-developed alpine glacial topography (with cirques, ridges, horns, and spurs) characterizes the region. Alpine topography has propagated from the deep troughs into the intervening mountain blocks. This morphology can locally be very old and reflects a different-from-present climatic regime. 3) Relict summit mesas occur in the high central mountain ranges between troughs. 4) The fourth type of morphology features undulating coastal piedmonts that are tilted seaward. The process of inland erosion by outlet glacier troughts and adjacent alpine topography has left isolated nearly intact remnants of the original topography. Trimlines superimposed on the alpine and outlet-trough topography mark the maximum possible expansion of the northern Victoria Land ice cover since erosion of the alpine topography. There is no definitive evidence that the East Antarctic Ice Sheet overrode northern Victoria Land nunataks or mountains. High-elevation striations in the Eisenhower Range seem to have been carved during Terra Nova glaciation. If so, local mesa ice caps and mountain glaciers expanded to feed the Terra Nova piedmont glacier during late Wisconsin time, unlike the situation farther south where alpine glacier termini in the Dry Valleys were less extensive than now during late Wisconsin time. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Victoria Land ARPI - Archivio della Ricerca dell'Università di Pisa |
institution |
Open Polar |
collection |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
language |
English |
topic |
Cenozoic Climate change Glacial history landscape analysi East Antarctic Ice Sheet Pleistocene Holocene Terra Nova Bay Victoria Land Antarctica |
spellingShingle |
Cenozoic Climate change Glacial history landscape analysi East Antarctic Ice Sheet Pleistocene Holocene Terra Nova Bay Victoria Land Antarctica OROMBELLI G DENTON G. H. BARONI, CARLO Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica |
topic_facet |
Cenozoic Climate change Glacial history landscape analysi East Antarctic Ice Sheet Pleistocene Holocene Terra Nova Bay Victoria Land Antarctica |
description |
The Transantarctic Mountains inland of Terra Nova Bay exhibit four major landsapces. 1) The first type consists of deep troughs propagated inland by headward cutting. The lower portions of these troughs form ice-covered fjords, where present-day grounding lines extend inland beneath outlet glaciers. 2) Well-developed alpine glacial topography (with cirques, ridges, horns, and spurs) characterizes the region. Alpine topography has propagated from the deep troughs into the intervening mountain blocks. This morphology can locally be very old and reflects a different-from-present climatic regime. 3) Relict summit mesas occur in the high central mountain ranges between troughs. 4) The fourth type of morphology features undulating coastal piedmonts that are tilted seaward. The process of inland erosion by outlet glacier troughts and adjacent alpine topography has left isolated nearly intact remnants of the original topography. Trimlines superimposed on the alpine and outlet-trough topography mark the maximum possible expansion of the northern Victoria Land ice cover since erosion of the alpine topography. There is no definitive evidence that the East Antarctic Ice Sheet overrode northern Victoria Land nunataks or mountains. High-elevation striations in the Eisenhower Range seem to have been carved during Terra Nova glaciation. If so, local mesa ice caps and mountain glaciers expanded to feed the Terra Nova piedmont glacier during late Wisconsin time, unlike the situation farther south where alpine glacier termini in the Dry Valleys were less extensive than now during late Wisconsin time. |
author2 |
Orombelli, G Baroni, Carlo Denton, G. H. |
format |
Article in Journal/Newspaper |
author |
OROMBELLI G DENTON G. H. BARONI, CARLO |
author_facet |
OROMBELLI G DENTON G. H. BARONI, CARLO |
author_sort |
OROMBELLI G |
title |
Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica |
title_short |
Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica |
title_full |
Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica |
title_fullStr |
Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica |
title_full_unstemmed |
Late Cenozoic glacial history of the Terra Nova Bay Region, northern Victoria Land, Antarctica |
title_sort |
late cenozoic glacial history of the terra nova bay region, northern victoria land, antarctica |
publishDate |
1990 |
url |
http://hdl.handle.net/11568/12167 |
genre |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Victoria Land |
op_relation |
volume:13 issue:2 firstpage:139 lastpage:163 numberofpages:25 journal:GEOGRAFIA FISICA E DINAMICA QUATERNARIA http://hdl.handle.net/11568/12167 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-0025524442 |
_version_ |
1796934684851044352 |