Layering in an Exhumed Crater at Meridiani Planum
Layering in an Exhumed Crater at Meridiani Planum
PSP_001374_1805  Science Theme: Sedimentary/Layering Processes
This observation features an exhumed crater in Meridiani Planum, an equatorial region where the MER Rover Opportunity once explored.

An exhumed crater is one that formed a long time ago and was later infilled with materials and buried. Subsequent erosion has caused this crater to become exposed at the surface once again.

The crater interior contains a sequence of layers that are remnants of the material that originally filled the crater. The layers were deposited then became cemented as overlying layers pressed them down. The sequence of layers has not eroded evenly because different layer compositions and other factors, such as cementation and chemical alteration, can make certain locations more resistant to erosion.

Written by: Kelly Kolb  (19 September 2007)
Acquisition date
11 November 2006

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
267.1 km (166.0 miles)

Original image scale range
from 27.1 cm/pixel (with 1 x 1 binning) to 54.1 cm/pixel (with 2 x 2 binning)

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
55°, with the Sun about 35° above the horizon

Solar longitude
133.8°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  27.5°
Black and white
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IRB color
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Merged IRB
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Merged RGB
map projected

RGB color
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Black and white
map-projected   (425MB)

IRB color
map-projected   (299MB)

Black and white
map-projected  (191MB)
non-map           (147MB)

IRB color
map projected  (79MB)
non-map           (241MB)

Merged IRB
map projected  (122MB)

Merged RGB
map-projected  (125MB)

RGB color
non map           (222MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

IRB: infrared-red-blue
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.