Nili Fossae Trough, Candidate MSL Landing Site
NASA/JPL/University of Arizona
Nili Fossae Trough, Candidate MSL Landing Site
PSP_003086_2015  Science Theme: Future Exploration/Landing Sites
French  Italian  Portuguese  Spanish 


800  1024  
1152  1280  
1440  1600  
1920  2048  


PDF, 11 x 17 in  
The Nili Fossae region of Mars is one of the largest exposures of clay minerals discovered by the OMEGA spectrometer on Mars Express and mapped in greater detail by the CRISM spectrometer on MRO (see the gallery).

In the HiRISE IRB color, dark blue regions are basaltic in composition, including sand-sized material that bounces around in the wind to form dunes. Basalt in the most common type of volcanic rock on the Earth and other terrestrial planets.

The light-toned areas (with a variety of colors) and covered by small-scale fractures is the clay-rich material. Clay minerals contain hydrogen and oxygen (i.e., water) within their mineral structure, and may also preserve organic materials, so there is great interest in studying these deposits to understand past environments that could have supported life.

We are also releasing a video produced by the digital animation group at JPL, scrolling from south to north over this image, as a simulation of the view from the MRO spacecraft.The colors have been specially enhanced for this video, beyond the standard enhancements applied to all HiRISE color images. A sample of the enhanced color is shown here; the purple areas are basaltic materials, orange areas are rich in clays, and the blue-green patches are outcops of unaltered rocks rich in the mineral pyroxene. This would be a wonderful place for detailed exploration by a rover like MSL.

Written by: Alfred McEwen   (15 December 2010)

This is a stereo pair with PSP_003587_2015.

Click to share this post on Twitter Click to share this post on Facebook Click to share this post on Google+ Click to share this post on Tumblr

 Image Products: All image links are drag & drop for HiView, or click to download
B&W: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

B&W: map-projected (1405MB)

IRB color: map-projected (611MB)
B&W: map-projected  (659MB),
non-map  (758MB)

IRB color: map projected  (281MB)
non-map  (568MB)

Merged IRB: map projected  (319MB)

Merged RGB: map-projected  (322MB)

RGB color: non map-projected  (535MB)
Map-projected reduced-resolution (PNG)
Full resolution JP2 download
View anaglyph details page

B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:24 March 2007 Local Mars time:15:38
Latitude (centered):21.125° Longitude (East):74.238°
Range to target site:282.4 km (176.5 miles)Original image scale range:28.2 cm/pixel (with 1 x 1 binning) so objects ~85 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:7.4° Phase angle:55.5°
Solar incidence angle:62°, with the Sun about 28° above the horizon Solar longitude:206.4°, Northern Autumn

Context map

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: Image: 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.