Glaciation in Elysium
Results of a study of high resolution Viking Orbiter images of the northwestern slopes of Elysium Mons, using a variety of image analysis techniques, provide striking evidence of an extended period of glaciation that involved a large ice sheet of greater than 1.2 km thickness and subice fluvial acti...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930010613 2023-05-15T14:04:19+02:00 Glaciation in Elysium Anderson, Duwayne M. Unclassified, Unlimited, Publicly available JAN 1, 1992 http://ntrs.nasa.gov/search.jsp?R=19930010613 unknown http://ntrs.nasa.gov/search.jsp?R=19930010613 Accession ID: 93N19802 No Copyright Other Sources 91 Workshop on the Polar Regions of Mars: Geology, Glaciology, and Climate History, Part 1; p 1 1992 ftnasantrs 2012-02-15T19:48:43Z Results of a study of high resolution Viking Orbiter images of the northwestern slopes of Elysium Mons, using a variety of image analysis techniques, provide striking evidence of an extended period of glaciation that involved a large ice sheet of greater than 1.2 km thickness and subice fluvial activity that contributed to the formation of the channels of Hrad Valles and Granicus Valles. These two unusual channel systems begin on the lower slopes of Elysium Mons and extend into Utopia Planitia in the region lying between 215 and 230 degs W and between 25 and 45 degs N. Key indicators are the presence of serrated volcanic constructs whose dimensions and morphology indicate an origin involving successive, localized, subice fissure eruptions. The channels visible in Hrad Valles bear a striking resemblance to subice fluvial features found in the dry valleys of Antarctica at the periphery of this massive continental ice sheet. Crater size distributions and crater morphologies are quite consistent with this interpretation, as are certain other topographic features suggesting the presence in the past of ice-rich permafrost that, while having undergone significant degradation, still remains. Other/Unknown Material Antarc* Antarctica Ice Ice Sheet permafrost NASA Technical Reports Server (NTRS) Valles ENVELOPE(-58.783,-58.783,-62.167,-62.167) |
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Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
91 |
spellingShingle |
91 Anderson, Duwayne M. Glaciation in Elysium |
topic_facet |
91 |
description |
Results of a study of high resolution Viking Orbiter images of the northwestern slopes of Elysium Mons, using a variety of image analysis techniques, provide striking evidence of an extended period of glaciation that involved a large ice sheet of greater than 1.2 km thickness and subice fluvial activity that contributed to the formation of the channels of Hrad Valles and Granicus Valles. These two unusual channel systems begin on the lower slopes of Elysium Mons and extend into Utopia Planitia in the region lying between 215 and 230 degs W and between 25 and 45 degs N. Key indicators are the presence of serrated volcanic constructs whose dimensions and morphology indicate an origin involving successive, localized, subice fissure eruptions. The channels visible in Hrad Valles bear a striking resemblance to subice fluvial features found in the dry valleys of Antarctica at the periphery of this massive continental ice sheet. Crater size distributions and crater morphologies are quite consistent with this interpretation, as are certain other topographic features suggesting the presence in the past of ice-rich permafrost that, while having undergone significant degradation, still remains. |
format |
Other/Unknown Material |
author |
Anderson, Duwayne M. |
author_facet |
Anderson, Duwayne M. |
author_sort |
Anderson, Duwayne M. |
title |
Glaciation in Elysium |
title_short |
Glaciation in Elysium |
title_full |
Glaciation in Elysium |
title_fullStr |
Glaciation in Elysium |
title_full_unstemmed |
Glaciation in Elysium |
title_sort |
glaciation in elysium |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930010613 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(-58.783,-58.783,-62.167,-62.167) |
geographic |
Valles |
geographic_facet |
Valles |
genre |
Antarc* Antarctica Ice Ice Sheet permafrost |
genre_facet |
Antarc* Antarctica Ice Ice Sheet permafrost |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930010613 Accession ID: 93N19802 |
op_rights |
No Copyright |
_version_ |
1766275350367567872 |