Samara Valles
NASA/JPL/University of Arizona
Samara Valles
ESP_016895_1525  Science Theme: Sedimentary/Layering Processes
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PDF, 11 x 17 in  
Samara Valles is one of the longest ancient valley systems on Mars. This system traverses over 1000 kilometers towards the northwest across the heavily cratered Southern highlands eroding into the gentle slopes of Terra Meridiani. The valley terminates in the Northern lowlands within the Chryse Basin where both Viking Lander 1 and Pathfinder are located.

The full image is centered at 27 degrees South and 344 degrees West and transects a portion of the upper reach of Samara Valles. The valley is several hundred meters wide at this location and the surface is mantled with dust as evidenced by the system of dunes that line the valley floor. The surface is heavily cratered by ancient impacts whose ejecta blankets have long ago been eroded and subsequently buried by dust which mantles the entire region.

Written by: Ginny Gulick   (31 March 2010)

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Acquisition date
04 March 2010

Local Mars time:

Latitude (centered)

Longitude (East)

Range to target site
261.0 km (163.1 miles)

Original image scale range
26.1 cm/pixel (with 1 x 1 binning) so objects ~78 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle:

Phase angle:

Solar incidence angle
66°, with the Sun about 24° above the horizon

Solar longitude
59.7°, Northern Spring

North azimuth:

Sub-solar azimuth:
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   (760MB)

IRB color
map-projected   (341MB)

Black and white
map-projected  (372MB)
non-map           (412MB)

IRB color
map projected  (101MB)
non-map           (288MB)

Merged IRB
map projected  (163MB)

Merged RGB
map-projected  (158MB)

RGB color
non map           (290MB)
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/JPL/University of Arizona

For information about NASA and agency programs on the Web, visit: 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.