THEMIS observes possible cave skylights on Mars

Alternative Title

Geophysical Research Letters

Publication Date

9-15-2007

Volume Number

34

Abstract

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.

Document Type

Article

Digital Object Identifier (DOI)

https://doi.org/10.1029/2007GL030709

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