Delta Structure in Eberswalde Crater

Eberswalde Crater contains layered rocks about 100-meters thick exposed in a a well-preserved delta (Malin and Edgett 2003, Moore et al. 2003).

This sedimentary deposit contains dozens of shallowly tilted , alternating bright and dark layers of varying thickness (1 to 10 meters). HiRISE terrain models reveal structures in these layers which are interpreted as lake-floor deposits (Lewis and Aharonson 2006, Pondrelli et al. 2008).

This delta is distinguished from other fan-shaped deposits on Mars by the presence of a preserved distributary network including lobes, inverted channels, and meander cutoffs. Another example of a fan with a distributary network can be found in Jezero Crater, which may represent a more degraded version of the same kind of system.

Written by: Ross A. Beyer (audio by Tre Gibbs)   (27 February 2013)

This is a stereo pair with PSP_001534_1560 .

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Image: NASA/JPL/University of Arizona