This image captured by NASA 2001 Mars Odyssey spacecraft shows part of the lava field just off the northern flank of Ascraeus Mons. The depressions are collapse features most likely related to lava tubes below the surface.
This image captured by NASA 2001 Mars Odyssey spacecraft shows part of the lava field just off the northern flank of Ascraeus Mons. The depressions are collapse features most likely related to lava tubes below the surface.