Fluvial Fan on a Crater Floor
NASA/JPL/University of Arizona
Fluvial Fan on a Crater Floor
ESP_024887_2155  Science Theme: Fluvial Processes
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This observation shows a terrific fan-shaped deposit, beginning where the channel enters a crater. This is suggestive of a delta: a deposit that forms when water in a channel flows into a larger area (such as an ocean or a lake). As the water spreads out, it moves slower and drops the sediment that it is carrying, forming the delta. (E.g., a famous Earth example is the Nile River delta.)

The THEMIS instrument also photographed this area (I03235002), as well as the Context Camera (CTX) aboard the Mars Reconnaissance Orbiter. The resolution of HiRISE helps scientists determine the topography of the region which is needed for establishing the stratigraphic relations and flow direction of the area.

Here is a view of the terrain to the south of the craters in the full image.

This caption is based on the original science rationale.

Written by: HiRISE Science Team   (25 January 2012)

This is a stereo pair with ESP_025309_2155.

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Acquisition date:17 November 2011 Local Mars time:14:34
Latitude (centered):35.151° Longitude (East):304.531°
Range to target site:296.1 km (185.1 miles)Original image scale range:29.6 cm/pixel (with 1 x 1 binning) so objects ~89 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:8.9° Phase angle:33.2°
Solar incidence angle:41°, with the Sun about 49° above the horizon Solar longitude:31.0°, Northern Spring

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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.