Cerberus Fossae East of the Head of Athabasca Valles
NASA/JPL/University of Arizona

Cerberus Fossae East of the Head of Athabasca Valles
ESP_016216_1900  Science Theme: Volcanic Processes
Italiano  Greek


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This image shows part of Cerberus Fossae, a long system of extensional (normal) faults arranged in trough-bounding (graben-bounding) pairs. Cerberus Fossae served as the source of a large volcanic eruption that draped Athabasca Valles in lava.

Large boulders that have been dislodged from the graben walls are visible on the floor of Cerberus Fossae. The first subimage shows an example of an approximately 6 meter (20 feet) boulder that left a distinct track as it moved downhill. Although this track is quite clear, ripples inside the track are discernable, indicating that enough time has passed for wind activity to rework loose material into the form of ripples. With close examination of this observation, one can see many boulder tracks, some with ripples and some without ripples.

Wind streaks emanating from impact craters are visible on the plains surrounding Cerberus Fossae. The second subimage shows a false color image of an approximately 33 meters (108 feet) impact crater. Material on the crater floor (blue in the color image) is being moved by the wind out of the crater and across the plains. The wind streaks in this observation indicate that the predominant wind direction in this region is from East to West.
Written by: Anjani Polit   (10 March 2010)



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Acquisition date:11 January 2010 Local Mars time: 2:49 PM
Latitude (centered):9.9 degrees Longitude (East):158.3 degrees
Range to target site:278.7 km (174.2 miles)Original image scale range:27.9 cm/pixel (with 1 x 1 binning) so objects ~84 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:EQUIRECTANGULAR
Emission angle:9.0 degrees Phase angle:33.1 degrees
Solar incidence angle:42 degrees, with the Sun about 48 degrees above the horizon Solar longitude:36.2 degrees, Northern Spring
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North azimuth:97 degrees Sub-solar azimuth:16.2 degrees
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North azimuth:270 degreesSub solar azimuth:190.7 degrees

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