Mantled Craters in Terra Cimmeria
Mantled Craters in Terra Cimmeria
PSP_006736_1325  Science Theme: Glacial/Periglacial Processes
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  (7 May 2008)
Acquisition date
03 January 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
249.7 km (155.2 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

Emission angle

Phase angle

Solar incidence angle
63°, with the Sun about 27° above the horizon

Solar longitude
12.1°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  48.9°
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Black and white
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non-map           (1009MB)

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B&W label
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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

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’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.