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Perspective view of Mars: Apollinaris Mons, Gusev Crater, and Ma'adim Vallis
Perspective view of Mars: Apollinaris Mons, Gusev Crater, and Ma'adim Vallis The straight, steep-sided channel of Ma'adim Vallis enters the flat-floored Gusev crater from the south in this perspective view of Mars generated from Mars Global Surveyor topographic data and Viking orbiter color data. To the north (left) of Gusev is a volcano, Apollinaris Mons. The Mars Exploration Rover Spirit performed its mission within Gusev crater from January 2004 to March 2010. NASA / JPL-Caltech / USGS / MOLA Science Team