A Fan with Inverted Channels
NASA/JPL/University of Arizona
A Fan with Inverted Channels
ESP_055505_1520  Science Theme: Fluvial Processes
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This image shows inverted channels within a fan whose origin could be either fluvial (produced by the action of a stream) or alluvial (created by sedimentary deposits).

If the fan is alluvial, then it formed on dry land. If the fan is fluvial, then it could have formed in water, like a delta. Similar fans with inverted channels are found in Eberswalde and Jezero craters, both of which are interpreted as deltas and are considered candidate locations of future rover landing sites.

Written by: Cathy Weitz (audio: Tre Gibbs)  (4 September 2018)

This is a stereo pair with ESP_055360_1520.
 
Acquisition date
30 May 2018

Local Mars time:
15:26

Latitude (centered)
-27.884°

Longitude (East)
332.617°

Spacecraft altitude
289.5 km (181.0 miles)

Original image scale range
29.0 cm/pixel (with 1 x 1 binning) so objects ~87 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Equirectangular

Emission angle:
28.3°

Phase angle:
82.0°

Solar incidence angle
56°, with the Sun about 34° above the horizon

Solar longitude
184.5°, Northern Autumn

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North azimuth:  95°
Sub-solar azimuth:  26.5°
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NASA/JPL/University of Arizona

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.