Northern hemisphere Martian gullies and mantled terrain: Implications for near-surface water migration in Mars' recent past

Details Northern hemisphere Martian gullies and mantled terrain: Implications for near-surface water migration in Mars' recent past Northern hemisphere Martian gullies and mantled terrain: Implications for near-surface water migration in Mars' recent past

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jgre..11109014b&link_type=abstract

Journal of Geophysical Research, Volume 111, Issue E9, CiteID E09014

Mathematics

Logic

20

Planetary Sciences: Solar System Objects: Mars, Planetary Sciences: Solid Surface Planets: Hydrology And Fluvial Processes, Planetary Sciences: Solid Surface Planets: Surface Materials And Properties, Planetary Sciences: Solid Surface Planets: Erosion And Weathering

Scientific paper

We report on a systematic study of gullies and mantled terrain in the northern hemisphere of Mars. Consistent with previous work, the mantled terrain is generally located on poleward-facing slopes, and gullies are found at all orientations. New results are as follows: (1) The range of orientations of mantled terrain increases toward the pole, (2) near-polar gullies are commonly less morphologically developed compared to ones in the temperate latitudes, (3) gullies toward the pole are better preserved than those closer to the equator, and (4) these studies are conducted in the northern hemisphere, whereas most previous work investigated the south. No gully model in the literature cleanly fits all these observations (nor any other gully observations reported in other papers). However, the likely effects of obliquity and precession variations on snow formation, preservation, and melting are consistent with many of the results.

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