Scoured Bedrock on the Floor of Eos Chasma
NASA/JPL/University of Arizona
Scoured Bedrock on the Floor of Eos Chasma
ESP_012940_1655  Science Theme: Geologic Contacts/Stratigraphy
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The scoured and scabby floor of Eos Chasma, located east of Valles Marineris, is covered with dunes or ripples and eroded craters. The reddish-brown color likely represents older, eroded basalt. Much of this erosion may have been accomplished by water.

An eroded crater exposes compositional differences below the surface: the bluish tones are probably fresher, boulder-rich exposures of basalt and the lighter-toned material near the base of the crater wall may have a different composition. The bottom of the crater is filled with material that is similarly-toned to the surface of Eos Chasma, and was likely eroded and transported there by the wind.

Written by: Sharon Wilson  (13 May 2009)

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Acquisition date
30 April 2009

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