Impact craters expose the subsurface materials on steep slopes. However, these slopes often experience rockfalls and debris avalanches that keep the surface clean of dust, revealing a variety of hues, like in this enhanced-color image, representing different rock types. The bright reddish material at the top of the crater rim is from a coating of the Martian dust.

The long streamers of material are from downslope movements. Also revealed in this slope are a variety of bedrock textures, with a mix of layered and jumbled deposits. This sample is typical of the Martian highlands, with lava flows and water-lain materials depositing layers, then broken up and jumbled by many impact events.

(Note: North is approximately down in the cutout and above image).

ID: ESP_021520_1550
date: 28 February 2011
altitude: 255 km

https://uahirise.org/hipod/ESP_021520_1550
NASA/JPL-Caltech/University of Arizona
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