Layered Rocks in Meridiani
NASA/JPL/University of Arizona
Layered Rocks in Meridiani
PSP_006873_1800  Science Theme: Geologic Contacts/Stratigraphy
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This image shows a broad expanse of light-toned sediments in Terra Meridiani, near the Martian equator. Light deposits like this are common in many parts of Mars, and indicate a history of diverse geologic processes.

The rocks here are eroding in a variety of different textures and patterns, that may correspond to changes in factors like grain size and degree of cementation, or to entirely different types of rock. There is also a substantial color diversity across the image.

Rocks like these have many possible origins. They could have been laid down in rivers or lakes, settled from the air as dust or volcanic ash, or deposited by desert sand dunes. Sand dune deposits are known to occur in this region of Mars at the landing site of the Opportunity rover, but the rocks exposed there are only part of a thick stack. Some of the rocks in this image may have been deposited in streams: the narrow ridges in the northern part of the image could be an old channel converted into a ridge. This has happened at other sites on Mars where stream beds are more resistant to erosion than their surroundings.

Written by: HiRISE Team Member  (3 March 2008)

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Acquisition date
14 January 2008

Local Mars time:
14:33

Latitude (centered)
0.115°

Longitude (East)
4.348°

Range to target site
272.1 km (170.1 miles)

Original image scale range
54.4 cm/pixel (with 2 x 2 binning) so objects ~163 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
3.8°

Phase angle:
42.7°

Solar incidence angle
39°, with the Sun about 51° above the horizon

Solar longitude
17.2°, Northern Spring

North azimuth:
96°

Sub-solar azimuth:
17.6°
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non-map           (402MB)

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Color label
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Merged RGB label
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HiView

NB
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

USAGE POLICY
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/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.