Gullies on Southwest Slope of Ring Trough in Noachis Terra
NASA/JPL/University of Arizona
Gullies on Southwest Slope of Ring Trough in Noachis Terra
ESP_012912_1320  Science Theme: Fluvial Processes
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Geologically young gullies are a prime target for the HiRISE camera. Gullies are located in a variety of settings and are found all over Mars.

This "ring trough" or eroded pit crater, is located in the rugged southern highland terrain known as Noachis Terra. The HiRISE image shows the layered, boulder-rich wall rock facing to the northeast and gullies that are transporting material downslope.

The material collects into debris aprons along the walls, which often exhibit narrow channels along its surface.

Written by: Sharon Wilson   (1 July 2009)

This is a stereo pair with ESP_012767_1320.

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Acquisition date:28 April 2009 Local Mars time:15:12
Latitude (centered):-47.532° Longitude (East):4.409°
Range to target site:273.4 km (170.9 miles)Original image scale range:27.3 cm/pixel (with 1 x 1 binning) so objects ~82 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:23.3° Phase angle:66.8°
Solar incidence angle:44°, with the Sun about 46° above the horizon Solar longitude:255.6°, Northern Autumn

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