A Possible Alluvial Fan
NASA/JPL/University of Arizona
A Possible Alluvial Fan
ESP_044388_2160  Science Theme: Fluvial Processes


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This image shows the northern rim of a crater in Deuteronilus. At the northern end, we see the crater rim and ridges inside and below that rim. A channel set is entering from the west and passing through a notch in a ridge. Topographically below that notch, overlapping lobes spread over the crater floor.

Fan-shaped lobes likes these are also in the desert southwest of the United States, and are called “alluvial fans.” They are caused when streams that carry sediment in a confined channel open up onto a plain or wide area, and deposit their sediment just outside of the channel mouth.

Written by: Ross Beyer (audio: Tre Gibbs)   (10 February 2016)

This is a stereo pair with ESP_028274_2160.

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Acquisition date:15 January 2016 Local Mars time:15:10
Latitude (centered):35.880° Longitude (East):0.405°
Range to target site:323.1 km (201.9 miles)Original image scale range:64.7 cm/pixel (with 2 x 2 binning) so objects ~194 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:25.1° Phase angle:17.0°
Solar incidence angle:42°, with the Sun about 48° above the horizon Solar longitude:95.4°, Northern Summer

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