Small Valleys and Colorful Bedrock in Terra Cimmeria
NASA/JPL/University of Arizona
Small Valleys and Colorful Bedrock in Terra Cimmeria
ESP_012853_1480  Science Theme: Fluvial Processes
French  Italian  Portuguese  Spanish 

WALLPAPER

800  1024
1152  1280
1440  1600
1920  2048
2560

HIFLYER

PDF, 11 x 17 in
This image shows a network of small valleys in the Terra Cimmeria region of the Martian southern highlands. This location is approximately 1000 kilometers (600 miles) south of Gusev Crater, the landing site of the Mars Exploration Rover Spirit.

The valleys in this image are carved into light-toned bedrock exhibiting a range of colors, which likely reflect a range of mineralogical compositions. The bedrock is pervasively fractured, and some of the fractures appear to be filled with material of a different color, possibly composed of minerals that crystallized or were cemented together when fluids (perhaps water) circulated through the fractures.

On the right side of the subimage is a valley filled with dark material and a central, bright ridge. If the valley was carved by liquid water, then this ridge may mark a former stream channel where coarse-grained sediment was deposited, which has survived erosion more effectively than the finer-grained sediment in the valley outside the channel.

Similar �inverted channel� deposits are visible elsewhere on Mars, and some examples in the southern highlands have been inferred to contain chloride salts (similar to table salt). The color and texture of the possible inverted channels in this image are similar to those inferred to contain chlorides, which may have been deposited when salty water evaporated.

Considered together, the features in this image attest to a history of water-related activity at this location on Mars.

Written by: James Wray  (27 May 2009)

This is a stereo pair with ESP_013354_1480.
twitter  •  facebook  •  google+  •  tumblr
 
Acquisition date
24 April 2009

Local Mars time:
15:22

Latitude (centered)
-31.503°

Longitude (East)
175.682°

Range to target site
255.8 km (159.9 miles)

Original image scale range
51.2 cm/pixel (with 2 x 2 binning) so objects ~154 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
6.1°

Phase angle:
39.0°

Solar incidence angle
45°, with the Sun about 45° above the horizon

Solar longitude
252.7°, Northern Autumn

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  2.5°
JPEG
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

JP2
Black and white
map-projected   (320MB)

IRB color
map-projected   (151MB)

JP2 EXTRAS
Black and white
map-projected  (161MB)
non-map           (196MB)

IRB color
map projected  (73MB)
non-map           (185MB)

Merged IRB
map projected  (339MB)

Merged RGB
map-projected  (303MB)

RGB color
non map           (161MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
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
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.