Physics
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mpse.conf..123m&link_type=abstract
International Conference on Mars Polar Science and Exploration, p. 123
Physics
Debris, Deformation, Degradation, Escarpments, Ice, Mars Surface, Mars (Planet), Convexity, Mars Observer, Sublimation, Valleys
Scientific paper
Lobate debris aprons are landforms observed in the mid-latitudes regions of Mars at the foot of kilometer high scarps. Because of their lobate front and convex shape they have been interpreted as the result of the viscous deformation of an ice-rock mixture. Recent analyses of Mars Observer Laser Altimeter (MOLA) data confirm these previous conclusions. Fretted channels correspond to lineated valley fills interpreted in the same way by viscous deformation of ground ice but guided by the shape of the valley. New Mars Orbiter Camera (MOC) high resolution images of the surface of both lobate debris aprons and fretted channels show mysterious network of knobs and highly dissected units. This study proposes to explain these landforms by a thermokarstic degradation due to the sublimation of ground ice. Additional information can be found in the original extended abstract.
Costard Francois
Mangold Nicolas
Peulvast J.-P.
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