Erosion of the Edge of the South Polar Layered Deposits
NASA/JPL/University of Arizona
Erosion of the Edge of the South Polar Layered Deposits
ESP_013224_1080  Science Theme: Polar Geology


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This oblique view of the sloping edge of the stack of icy layers over the South Pole has some interesting morphologies.

The slope appears to be eroding from a combination of landslides, block falls, and sublimation. The bright icy exposure in the larger landslide scar (upper right) suggests that this was a relatively recent event.

Small-scale textures over the scene are due to both blowing wind and the thermal expansion and contraction of shallow ice.

Written by: Alfred McEwen  (22 May 2017)

This is a stereo pair with ESP_013026_1080.
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Acquisition date
22 May 2009

Local Mars time:
15:57

Latitude (centered)
-71.942°

Longitude (East)
143.739°

Range to target site
285.3 km (178.3 miles)

Original image scale range
57.1 cm/pixel (with 2 x 2 binning) so objects ~171 cm across are resolved

Map projected scale
50 cm/pixel

Map projection
Polarstereographic

Emission angle:
31.2°

Phase angle:
36.3°

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

Solar longitude
270.9°, Northern Winter

For non-map projected images
North azimuth:  99°
Sub-solar azimuth:  43.1°
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ANAGLYPHS
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ADDITIONAL INFORMATION
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IRB: infrared-red-blue
RGB: red-green-blue
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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.