Light-Toned Rocks inside a Crater
NASA/JPL/UArizona
Light-Toned Rocks inside a Crater
ESP_017292_1680  Science Theme: Composition and Photometry
This approximately 20 kilometer diameter impact crater is located just to the south of Coprates Chasma in Valles Marineris.

Near the center of the crater are some light-toned rocks. These rocks are very jumbled and broken up rather than flat-lying and layered. These observations suggest that the light-toned rocks once existed below the current terrain and were brought up by the process that created the crater.

Several other craters around Valles Marineris also reveal light-toned rocks in their central peaks suggesting that the light-toned rocks are a regional unit that is buried beneath the lava plains that now surround Valles Marineris.

Written by: Cathy Weitz  (5 May 2010)

This is a stereo pair with ESP_025375_1680.
 
Acquisition date
04 April 2010

Local Mars time
15:14

Latitude (centered)
-11.860°

Longitude (East)
304.480°

Spacecraft altitude
258.2 km (160.5 miles)

Original image scale range
26.0 cm/pixel (with 1 x 1 binning) so objects ~78 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
4.8°

Phase angle
56.3°

Solar incidence angle
60°, with the Sun about 30° above the horizon

Solar longitude
73.2°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  43.8°
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Black & white is 5 km across; enhanced color about 1 km
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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
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POSTSCRIPT
NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA’s Science Mission Directorate, Washington. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.