Knobs, Bright Deposits, and Inverted Channels in Eberswalde Crater

Eberswalde Crater is an approximately 65-kilometer diameter, closed basin crater. It contains a delta, which indicates that flowing water was present for an extended period of time in the past.

Parts of the crater have inverted channels that have higher relief because a more resistant material was deposited in the channel and therefore it was less susceptible to erosion than the surrounding area. The image also shows resistant knobs and mounds as well as a scoured surface.

The CRISM instrument on-board MRO has detected phyllosilicates (clays) in some of the bright layers here. On Earth, clays form in the presence of water, so this is more evidence that there was a persistent flow of water in Eberswalde.

Written by: Jennifer Griffes   (12 November 2008)

This is a stereo pair with PSP_010553_1560 .

More info and image formats at

Image: NASA/JPL/University of Arizona