Stratigraphy Exposed by an Impact Crater

Geologists love roadcuts because they reveal the bedrock stratigraphy (layering). Until we have highways on Mars, we can get the same information from fresh impact craters.

An enhanced color closeup reveals these layers filling a larger crater, perhaps a combination of lava, impact ejecta, and sediments.

Written by: Alfred McEwen (audio: Tre Gibbs)  (10 May 2017)

More info and image formats at

Image: NASA/JPL/University of Arizona