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Accession Number N20130009098
Title Periglacial Analog for Landforms in Gale Crater, Mars.
Publication Date 2013
Media Count 2p
Personal Author D. Z. Oehler
Abstract Several features in a high thermal inertia (TI) unit at Gale crater can be interpreted within a periglacial framework. These features include polygonally fractured terrain (cf. ice-wedge polygons), circumferential patterns of polygonal fractures (cf. relict pingos with ice-wedge polygons on their surfaces), irregularly-shaped and clustered depressions (cf. remnants of collapsed pingos and ephemeral lakes), and a general hummocky topography (cf. thermokarst). This interpretation would imply a major history of water and ice in Gale crater, involving permafrost, freeze-thaw cycles, and perhaps ponded surface water.
Keywords Cycles
Fractures(Materials)
Freezing
Ice
Mars craters
Permafrost
Polygons
Surface water
Terrain
Thermal emission
Topography

 
Source Agency National Aeronautics and Space Administration
NTIS Subject Category 55A - Aeronomy
54A - Astrogeology
Corporate Author National Aeronautics and Space Administration, Houston, TX. Lyndon B. Johnson Space Center.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1319
Contract Number N/A

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