Polygenetic origin of Hrad Vallis region of Mars
A variety of apparently genetically related landforms in the Hrad Vallis region of Mars is examined. It is found that the outer valley of Hrad and the neighboring valley are composite features formed by karst or thermokarst processes and the growth and coalescence of smaller fault-aligned depression...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19920048231 2023-05-15T18:32:57+02:00 Polygenetic origin of Hrad Vallis region of Mars De Hon, Rene A. Unclassified, Unlimited, Publicly available JAN 1, 1992 http://ntrs.nasa.gov/search.jsp?R=19920048231 unknown http://ntrs.nasa.gov/search.jsp?R=19920048231 Accession ID: 92A30855 Copyright Other Sources 91 Lunar and Planetary Science Conference; Mar. 18-22, 1991; Houston, TX; United States 1992 ftnasantrs 2012-02-15T19:31:11Z A variety of apparently genetically related landforms in the Hrad Vallis region of Mars is examined. It is found that the outer valley of Hrad and the neighboring valley are composite features formed by karst or thermokarst processes and the growth and coalescence of smaller fault-aligned depressions. The materials in the vicinity may be soluble carbonates or sulfates or clay-rich sediment subject to thixotropic collapse. Water circulating within fault and fissure systems removed materials or altered the stability of materials to allow formation of steep-sided depressions. After the emplacement of surface materials in early Amazonian time, water was probably discharged to the surface. Isolate topographic depressions probably formed synchronously with the early release of water. Open lakes may have existed for a time. Other/Unknown Material Thermokarst NASA Technical Reports Server (NTRS) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
topic |
91 |
spellingShingle |
91 De Hon, Rene A. Polygenetic origin of Hrad Vallis region of Mars |
topic_facet |
91 |
description |
A variety of apparently genetically related landforms in the Hrad Vallis region of Mars is examined. It is found that the outer valley of Hrad and the neighboring valley are composite features formed by karst or thermokarst processes and the growth and coalescence of smaller fault-aligned depressions. The materials in the vicinity may be soluble carbonates or sulfates or clay-rich sediment subject to thixotropic collapse. Water circulating within fault and fissure systems removed materials or altered the stability of materials to allow formation of steep-sided depressions. After the emplacement of surface materials in early Amazonian time, water was probably discharged to the surface. Isolate topographic depressions probably formed synchronously with the early release of water. Open lakes may have existed for a time. |
format |
Other/Unknown Material |
author |
De Hon, Rene A. |
author_facet |
De Hon, Rene A. |
author_sort |
De Hon, Rene A. |
title |
Polygenetic origin of Hrad Vallis region of Mars |
title_short |
Polygenetic origin of Hrad Vallis region of Mars |
title_full |
Polygenetic origin of Hrad Vallis region of Mars |
title_fullStr |
Polygenetic origin of Hrad Vallis region of Mars |
title_full_unstemmed |
Polygenetic origin of Hrad Vallis region of Mars |
title_sort |
polygenetic origin of hrad vallis region of mars |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19920048231 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Thermokarst |
genre_facet |
Thermokarst |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19920048231 Accession ID: 92A30855 |
op_rights |
Copyright |
_version_ |
1766217179208876032 |