Layered Deposits within Unnamed Crater in Arabia Terra
Layered Deposits within Unnamed Crater in Arabia Terra
PSP_008982_1965  Science Theme: Sedimentary/Layering Processes
This image shows the floor of an unnamed impact crater in Arabia Terra that has layered deposits. There are many craters in this region where layering is observed.

These layers are often exposed along the sides of large isolated mounds, small knobs and mesas, and other positive relief features. In some cases, the layering is expressed as narrow sinuous ridge-like structures along crater floors.

The presence of layered deposits is of particular interest because these materials are not likely to be related to the impact event, but rather post-impact infill of the crater. Modification of the deposits has now revealed layers of material.

HiRISE and other instruments onboard the Mars Reconnaissance Orbiter may provide more clues to the origin of the these deposits.

Written by: Frank Chuang  (6 August 2008)
Acquisition date
26 June 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
280.8 km (174.5 miles)

Original image scale range
28.1 cm/pixel (with 1 x 1 binning) so objects ~84 cm across are resolved

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25 cm/pixel and North is up

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Phase angle

Solar incidence angle
47°, with the Sun about 43° above the horizon

Solar longitude
90.5°, Northern Summer

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North azimuth:  97°
Sub-solar azimuth:  25.9°
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Black & white is 5 km across; enhanced color about 1 km
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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.