Composition of Mars

The composition of Mars covers the branch of the geology of Mars that describes the make-up of the planet Mars.

"Hottah" rock outcrop on Marsancient streambed[1][2][3] viewed by the Curiosity Rover (September 12, 2012, white balanced) (raw, close-up, 3-D version). Abundant iron compounds are responsible for the bright brownish-red colour of the martian soil.
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