Windblown Sand in Ganges Chasma
NASA/JPL/University of Arizona
Windblown Sand in Ganges Chasma
ESP_019507_1725  Science Theme: Aeolian Processes


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Dark, windblown sand covers intricate sedimentary rock layers in this image from Ganges Chasma, a canyon in the Valles Marineris system.

These features are at once familiar and unusual to those familiar with Earth's beaches and deserts. Most sand dunes on Earth are made of silica-rich sand, giving them a light color; these Martian dunes owe their dark color to the iron and magnesium-rich sand found in the region.

Written by: Kristin Block  (25 April 2017)
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Acquisition date
24 September 2010

Local Mars time:
15:37

Latitude (centered)
-7.557°

Longitude (East)
310.669°

Range to target site
267.1 km (167.0 miles)

Original image scale range
26.7 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
5.9°

Phase angle:
51.9°

Solar incidence angle
57°, with the Sun about 33° above the horizon

Solar longitude
153.4°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  23.8°
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non-map           (489MB)

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Merged RGB
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IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible:
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.