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A HiRISE image of a lava tube skylight entrance on the Martian volcano Pavonis Mons.. Caves and other underground structures, including Martian lava tubes, canyon overhangs, and other Martian cavities would be potentially useful for crewed missions, for they would provide considerable shielding from both the elements and intense solar radiation to which a Mars mission would expose astronauts.
A vision for habitats published by NASA from CASE FOR MARS from the 1980s, featuring the re-use of landing vehicles, in-situ soil use for enhanced radiation shielding, and green houses. A bay for a Mars rover is also visible. A human landing on Mars would necessitate different levels of support for habitation. A short term stay on the surface ...
Martian lava tubes are volcanic caverns on Mars that are believed to form as a result of fast-moving, basaltic lava flows associated with shield volcanism. [1] Lava tubes usually form when the external surface of the lava channels cools more quickly and forms a hardened crust over subsurface lava flows. [ 2 ]
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Whether the shield volcanoes were caused by antipodal impacts like that which produced Hellas, or if it is mere coincidence, is unknown. Elevation profiles along south to north transects across Mars' Hellas basin and the Moon's South Pole-Aitken basin, created with Lunar Quickmap and Mars Quickmap
A Hole in Mars – Astronomy Picture of the Day for 28 May 2007 "Arsia Mons". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program. The Cave in Arsia Mons is a science fiction story by astronomer Andrew Fraknoi, published in the anthology Building Red