Ice-driven creep on Martian debris slopes

Details Ice-driven creep on Martian debris slopes Ice-driven creep on Martian debris slopes

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30npla2p&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 14, pp. PLA 2-1, CiteID 1747, DOI 10.1029/2003GL017603

Physics

12

Hydrology: Geomorphology (1625), Planetary Sciences: Erosion And Weathering, Planetary Sciences: Surface Materials And Properties

Scientific paper

Accumulations of rocky debris at the base of bedrock escarpments on Mars have mean inclinations of ~20°, well below the angle of repose (~35°). These inclinations decrease with increasing latitude, suggesting a climatic influence. We present evidence that these low inclinations are the result of gravitational creep driven by repeated deposition and sublimation of ground ice. We estimate the rates of bedrock erosion and ice-driven creep on Mars and use a simple model to show that the probable time scale for debris slope development is between 20 Myr and 2 Gyr. Our results suggest that water ice has shaped Martian landscapes throughout the late Amazonian period.

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