HiRISE | Valleys on the Ejecta Blanket from Cerulli Crater (PSP_003312

NASA/JPL/University of Arizona

Valleys on the Ejecta Blanket from Cerulli Crater
PSP_003312_2145 Science Theme: Landscape Evolution

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This HiRISE image reveals valleys that cross the ejecta from the large impact crater Cerulli to the south.

The valleys appear to have been cut by flowing water and then buried by later deposits of unknown origin, possibly carried in by the wind. While it is clear that the valleys are younger than the ejecta and older than at least some of the mantling materials, the exact time they were formed is uncertain.

For example, it is possible that the valleys were carved immediately after Cerulli Crater formed, as has been inferred for some other valleys around craters imaged elsewhere on Mars by HiRISE. Alternatively, the valleys may have formed some time after the crater formed, perhaps as a result of water released from an earlier mantling deposit.
Written by: John Grant (8 September 2010)

This is a stereo pair with PSP_003378_2145.

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Acquisition date:	11 April 2007	Local Mars time:	3:27 PM
Latitude (centered):	34.0 degrees	Longitude (East):	21.8 degrees
Range to target site:	293.0 km (183.2 miles)	Original image scale range:	29.3 cm/pixel (with 1 x 1 binning) so objects ~88 cm across are resolved
Map projected scale:	25 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	3.7 degrees	Phase angle:	72.9 degrees
Solar incidence angle:	70 degrees, with the Sun about 20 degrees above the horizon	Solar longitude:	217.1 degrees, Northern Autumn
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North azimuth:	97 degrees	Sub-solar azimuth:	329.7 degrees
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North azimuth:	270 degrees	Sub solar azimuth:	145.5 degrees

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For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. 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. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.