Friday, May 2, 2014

Sunken and Pitted Ejecta in Utopia Planitia

The objective of this observation was to examine the edge of impact ejecta from a crater to the north-west of this area (north is up, west is to the left). The ejecta visible in the top left of this image seems to be lower than the surrounding surface.

This is unusual because impact ejecta is laid down on top of existing ground. The ejecta also seems to have pits. Perhaps the hot ejecta fell on frozen ground and melted the underlying ice?

Photo credit: NASA/JPL/University of Arizona

Note: This terrain is located in western Utopia Planitia, to the east of Utopia Rupes. For more information, see PIA18242: Sunken and Pitted Ejecta.

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