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Last updated on April 17, 2014 at 21:23 EDT
Central Peak of Copernicus Crater
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Central Peak of Copernicus Crater

November 30, 2012
Today's LROC NAC image (M102293451) is a close up of the 93-km (58 miles) diameter Copernicus crater showing light-toned fractured bedrock exposed on the higher slopes on the central structural uplift. The bedrock observed in this NAC frame appears to be somewhat intact, and not a breccia (i.e., a rock consisting of a jumble of randomly oriented rock fragments). It is only slightly brecciated (or fragmented), which is consistent with the manner in which crater central peak rocks are uplifted and exposed. This location gives us a glimpse of bedrock that was protected beneath the surface until exposed by the Copernicus impact event and later landslides. Dark materials appear to fill fractures in this outcrop that may be highly shocked materials (e.g., impact melt or breccias) that were injected into the rock during the formation of Copernicus. Copernicus crater as seen by the LROC Wide Angle Camera. Arrow highlights the approximate position of today's Featured Image. (LROC WAC image M119985095ME; 75 m/pixel; image width is 90 km) Credit: NASA/GSFC/Arizona State University