Valleys on the Ejecta Blanket from Cerulli Crater
NASA/JPL/UArizona
Valleys on the Ejecta Blanket from Cerulli Crater
PSP_003312_2145  Science Theme: Landscape Evolution
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  (2 May 2007)

This is a stereo pair with PSP_003378_2145.
 
Acquisition date
11 April 2007

Local Mars time
15:27

Latitude (centered)
34.019°

Longitude (East)
21.818°

Spacecraft altitude
292.4 km (181.7 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°

Phase angle
72.9°

Solar incidence angle
70°, with the Sun about 20° above the horizon

Solar longitude
217.1°, Northern Autumn

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  329.9°
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Black & white is 5 km across; enhanced color about 1 km
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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.