Compositionally Diverse Bedrock
Compositionally Diverse Bedrock
ESP_029234_2015  Science Theme: Composition and Photometry
Regolith, particulate fragmented rock and fine grained soils, generally covers most of the surface of Mars. Mantles of rocky dust often mute the landscape, filling in topographic lows and burying boulders. Sorted sand-sized soil grains are often evident in images in the form of sand dunes and ripples.

Clean exposures of bedrock are relatively rare. Fractured basement rock is sometimes visible between dunes. Sedimentary layers can also become eroded showing alternating bands, these visible bands manifesting from changes in rock strength between layers.The edges of scarps may also exhibit significant strength against erosion or large blocks and boulders at the base of the scarps. All of these examples are visible within this geologically rich image.

The abundance of rock exposures and relative scarcity of a obscuring soil layer make this region a good location to examine the compositional diversity of the parent bedrock.

Written by: Mike Mellon (narration: Tre Gibbs)  (7 November 2012)
Acquisition date
21 October 2012

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
279.3 km (173.6 miles)

Original image scale range
56.1 cm/pixel (with 2 x 2 binning) so objects ~168 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
58°, with the Sun about 32° above the horizon

Solar longitude
192.5°, Northern Autumn

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  345.4°
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

Black and white
map-projected   (521MB)

IRB color
map-projected   (303MB)

Black and white
map-projected  (277MB)
non-map           (251MB)

IRB color
map projected  (108MB)
non-map           (284MB)

Merged IRB
map projected  (547MB)

Merged RGB
map-projected  (493MB)

RGB color
non map           (252MB)
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.