NASA's Mars Global Surveyor shows lava flows and channels on the flanks of the Alba Patera volcano on Mars, mostly obscured by a covering of eroded, lumpy-textured material of unknown origin. This picture was taken in July 1998.

The lava flows and channels on the flanks of the Alba Patera volcano are mostly obscured by a covering of eroded, lumpy-textured material of unknown origin. This picture was taken in July 1998.

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