Northwest Ius Chasma Landslide and Dune Field
NASA/JPL/University of Arizona
Northwest Ius Chasma Landslide and Dune Field
ESP_026444_1720  Science Theme: 
French   German   Spanish   Italian   Dutch   Icelandic   Russian   Arabic   


720p (MP4)  
Listen to the text  


800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  2880  


PDF, 11 x 17 in  


Landslides in Valles Marineris are truly enormous, sometimes stretching from one wall to the base of another. This 45-kilometer-long HiRISE image alone drops nearly 2 kilometers in elevation into Ius Chasma. This landslide, known as Ius Labes, would occupy the surface area of Delaware.

Here, we can see dark-toned material emanating from the landslide scarp and forming dunes and dark streaks that were carried downslope by the wind. Geologic context and compositional information from CRISM suggest this dune field was locally derived from landslide material. Other locations in this image show smaller ripples and smooth, rounded textures of the landslide, both attesting to long-lived wind transport and erosion.

This site records a long and complex geologic history of landscape evolution. This history likely includes: (1) ancient lava flows and ash fall deposits which were deposited horizontally and would eventually make what now is canyon wall material; (2) extensional forces rifted or faulted Valles Marineris; (3) mass wasting ensued where gravity forced weak and dislodged rock down into the canyon as massive landslides or smaller fans of boulders; (4) wind driven aeolian forces took small sand-sized particles to form dunes and ripples observable in this image, while also slowly eroding the landscape and modifying its shape.

Written by: Matthew Chojnacki   (10 July 2013)

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 (568MB)

IRB color: map-projected (338MB)
B&W: map-projected  (301MB),
non-map  (294MB)

IRB color: map projected  (126MB)
non-map  (343MB)

Merged IRB: map projected  (607MB)

Merged RGB: map-projected  (557MB)

RGB color: non map-projected  (318MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:18 March 2012 Local Mars time:15:12
Latitude (centered):-7.939° Longitude (East):282.072°
Range to target site:264.9 km (165.5 miles)Original image scale range:53.0 cm/pixel (with 2 x 2 binning) so objects ~159 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:0.1° Phase angle:57.3°
Solar incidence angle:57°, with the Sun about 33° above the horizon Solar longitude:84.7°, Northern Spring

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.