Topography of small Martian valleys

Details Topography of small Martian valleys Topography of small Martian valleys

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..105..479g&link_type=abstract

Icarus, vol. 105, p. 479

Physics

35

Topography, Mars Surface, Valleys, Photogrammetry, Spaceborne Photography, Viking Orbiter Spacecraft

Scientific paper

Topographic profiles across 45 small valleys representative of the ancient highlands of Mars, obtained by 1D photoclinometry, have yielded mean depth/width ratios of 0.08; when valley profiles with uneven rims are excluded, the ratio is 0.07. Depths that are almost all in the 40-300 m range are obtained upon application of the lower ratio to the widths of a larger sample of small valleys. The measured valley depths imply that liquid water was often less than a few hundred meters under the surface in these valleys' vicinity during the period of their formation.

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