October 12, 2009
The surface textures observed in this THEMIS image of Ascraeus Mons are due to different volcanic flow types. Textural variations can be produced under a variety of different conditions such as varying cooling and flow rates. Also observed in the image are linear chains of craters that could be windows into lava tubes or secondary impact craters.
Topics: Ascraeus Mons, Shield volcanoes, Geology, Environment, Lava tube, Tharsis quadrangle, Volcano, Io