Gullies and Bedrock Exposures in Impact Crater Wall
NASA/JPL/University of Arizona
Gullies and Bedrock Exposures in Impact Crater Wall
PSP_009155_1480  Science Theme: Impact Processes
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This image shows a rather pristine crater with gullies and bedrock exposures. The gullies are mostly on the south-facing (poleward facing) wall. Some of the gully channels are very sharp, indicating that they have not been modified much since they formed.

Other channels criss-cross each other, demonstrating that there were multiple periods of activity. Scientists do not know how closely these were spaced in time.

The south and east walls of the crater have very distinct bright layers. These layers are possibly ancient bedrock. These walls also have what appear to be bright landslides.

Written by: Kelly Kolb  (20 August 2008)

This is a stereo pair with PSP_008153_1480.
 
Acquisition date
09 July 2008

Local Mars time:
15:34

Latitude (centered)
-31.475°

Longitude (East)
337.095°

Spacecraft altitude
261.7 km (163.5 miles)

Original image scale range
52.4 cm/pixel (with 2 x 2 binning) so objects ~157 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
13.4°

Phase angle:
68.0°

Solar incidence angle
76°, with the Sun about 14° above the horizon

Solar longitude
96.5°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  48.4°
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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:
NASA/JPL/University of Arizona

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.