Bouldery Deposit on Crater Floor
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Bouldery Deposit on Crater Floor

July 13, 2010
This image shows a degraded impact crater in the southern highlands. Part of the crater rim is visible at the top and bottom of the image, with the boulder-covered crater floor in the center.

The subdued appearance of the crater indicates that it has been highly modified since it formed. In the southern part of the crater floor a smaller impact crater overlies the larger crater. However, it too has been heavily eroded, such that it can only be identified by the circular pattern of boulders near the rim and the relatively boulder-free ejecta farther from the rim, which covers the boulder-rich floor of the large crater. The boulders in this image range in size from approximately 1 meter (3 feet) to approximately 6 meters (20 feet).

The dark lines crisscrossing the whole image are dust devil tracks that are formed when dust devils move across the surface and pick up bright dust, leaving darker coarse material behind.

Written by: Anjani Polit

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