HiRISE | Mantled Craters in Terra Cimmeria (PSP_006736

NASA/JPL/University of Arizona

Mantled Craters in Terra Cimmeria
PSP_006736_1325 Science Theme: Glacial/Periglacial Processes

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This image shows the intersection of two overlapping craters, although it is unknown which of the two formed first.

The two craters are covered in a mantling material, which gives them a smooth appearance. The mantling unit is thought to be water ice-rich. Concentric circles are visible on the floor of one crater. It is likely that these circles are evidence of ice-rich material that flowed off the crater wall, driven by gravity, onto the crater floor.

Outside of the craters, the plains have a pitted or dissected texture. Both of these textures are suggestive of material that once held ice that has since disappeared allowing the remaining soil to collapse into the subsurface. There are also dark dust devil tracks across the scene.

Written by: Kelly Kolb (14 May 2008)

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Acquisition date:	03 January 2008	Local Mars time:	2:42 PM
Latitude (centered):	-47.369 degrees	Longitude (East):	151.547 degrees
Range to target site:	249.8 km (156.1 miles)	Original image scale range:	25.0 cm/pixel (with 1 x 1 binning) so objects ~75 cm across are resolved
Map projected scale:	25 cm/pixel and North is up	Map projection:	EQUIRECTANGULAR
Emission angle:	0.7 degrees	Phase angle:	64.1 degrees
Solar incidence angle:	63 degrees, with the Sun about 27 degrees above the horizon	Solar longitude:	12.1 degrees, Northern Spring
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North azimuth:	97 degrees	Sub-solar azimuth:	48.9 degrees
For map-projected products
North azimuth:	270 degrees	Sub solar azimuth:	222.4 degrees

NEARBY OBSERVATIONS

Small Eroded Highlands Volcano in Western Terra Cimmeria
Crater in Terra Cimmeria
Gullied Crater Wall
Central Peak of Impact Crater
Crater in Terra Cimmeria
Crater with Gullies

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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: Image: NASA/JPL/University of Arizona

Postscript
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. 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. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.