Ice and debris in the fretted terrain, Mars

Details Ice and debris in the fretted terrain, Mars Ice and debris in the fretted terrain, Mars

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpsc...14..409l&link_type=abstract

(American Geophysical Union and NASA, Lunar and Planetary Science Conference, 14th, Houston, TX, Mar. 14-18, 1983) Journal of Ge

Physics

21

Highlands, Ice, Mars Surface, Planetary Evolution, Terrain Analysis, Channels, Climatology, Debris, Morphology, Wind Effects, Mars, Ice, Fretted Terrain, Debris, Surface, Features, Highlands, Viking Missions, Imagery, Observations, Hypotheses, Formation, Flow, Wind, Erosion, Atmosphere, Climate, Environment, Depth, Latitude, Thermal Effects, Temperature, Channels, Gradients, Deformation, Creep, Strain

Scientific paper

Viking moderate and high resolution images along the northern highland margin have been monoscopically and stereoscopically examined in order to study the development of fretted terrain. Young debris aprons around mesas and debris in tributary channels create typical fretted morphologies identical to ancient fretted morphologies. This suggests that the debris-apron process operating relatively recently also shaped the fretted terrain of the past. The debris aprons were lubricated by interstitial ice derived from ground ice. Abundant collapse features suggest that ground ice existed and may have flowed in places. The fretting process has been active for a long period and may be active today. The location of debris aprons in two latitudinal belts may be controlled by atmospheric conditions that permit ice in the region to remain in the ground below depths of about one meter and temperatures warm enough for ice to flow.

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