Remnants of a Viscous Flow on Mars
NASA/JPL/UArizona
Remnants of a Viscous Flow on Mars
ESP_028352_2245  Science Theme: Glacial/Periglacial Processes
Lobate flows are common in the Martian mid-latitude region (30-45 degrees). Some are pristine-looking and highly reminiscent of terrestrial glaciers, whereas others appear more degraded. The flow deposit shown here is a good example of a degraded flow deposit.

The uphill “head” toward the left has carved out an amphitheater-shape into the escarpment, and the “toe,” to the right, is lobate in shape. The surface is highly degraded and eroded, and the deposit shows evidence of deflation (loss of volume, probably from the sublimation of ice), as lateral moraines (ridges running along the length of the feature) are visible.

Written by: Eldar Noe (narration: Tre Gibbs)  (3 October 2012)
 
Acquisition date
13 August 2012

Local Mars time
15:18

Latitude (centered)
44.239°

Longitude (East)
28.458°

Spacecraft altitude
301.8 km (187.6 miles)

Original image scale range
60.7 cm/pixel (with 2 x 2 binning) so objects ~182 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
7.0°

Phase angle
61.2°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
154.6°, Northern Summer

For non-map projected images
North azimuth:  98°
Sub-solar azimuth:  343.7°
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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:
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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.