Colorful Rocks in Ritchey Crater
NASA/JPL/University of Arizona
Colorful Rocks in Ritchey Crater
ESP_011635_1510  Science Theme: Impact Processes
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The enhanced color image of this observation includes some interesting features in and near the central uplift of Ritchey Crater.

At the top is an ancient streambed, and above center are multicolored rocks and minerals in the central uplift. Large impact craters are unstable when they are formed, because their walls are so steep. Gravity causes the walls to collapse toward the center of the crater, colliding to form an uplift or peak. This process of central uplift formation can bring rocks from deep in the crater walls up to the surface.

The angular bright blocks near the center of this image show that this process breaks the wall rocks into fragments as the central uplift is formed.

Written by: Ken Herkenhoff   (25 February 2009)

This is a stereo pair with PSP_002682_1510.

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Acquisition date:19 January 2009 Local Mars time:16:00
Latitude (centered):-28.502° Longitude (East):309.059°
Range to target site:264.8 km (165.5 miles)Original image scale range:26.5 cm/pixel (with 1 x 1 binning) so objects ~79 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:15.0° Phase angle:46.9°
Solar incidence angle:61°, with the Sun about 29° above the horizon Solar longitude:194.0°, Northern Autumn

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