THEMIS observes possible cave skylights on Mars

Details THEMIS observes possible cave skylights on Mars THEMIS observes possible cave skylights on Mars

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3417201c&link_type=abstract

Geophysical Research Letters, Volume 34, L17201

Other

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Themis Cave Skylight Pit-Crater

Scientific paper

Seven possible skylight entrances into Martian caves were observed on and around the flanks of Arsia Mons by the Mars Odyssey Thermal Emission Imaging System (THEMIS). Distinct from impact craters, collapse pits or any other surface feature on Mars, these candidates appear to be deep dark holes at visible wavelengths while infrared observations show their thermal behaviors to be consistent with subsurface materials. Diameters range from 100 m to 225 m, and derived minimum depths range between 68 m and 130 m. Most candidates seem directly related to pit-craters, and may have formed in a similar manner with overhanging ceilings that remain intact.

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