Lava-Carved Gullies in a Crater
NASA/JPL/University of Arizona

Lava-Carved Gullies in a Crater
ESP_028321_1785  Science Theme: Volcanic Processes
Russian   Greek   Arabic   


720p (MP4)  
Listen to the text  


800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  2880 


PDF, 11 x 17 in  


This image shows an impact crater about 3-kilometer (1.8 miles) wide in a region that has been flooded by lava.

The lava has overtopped the rim in at least two areas, to the southwest and northwest, and created a pond of lava on the crater floor. Where it flowed down the steep crater slope it carved gullies. There are similar gullies on steep crater slopes on the Moon, but probably carved by impact melt rather than lava. Dark streaks seen elsewhere on the crater slopes are from dust avalanches.

On the plains outside the crater there are distinctive landforms that form from lava inflation, where molten lava is injected under a solid crust to raise the surface. Only lava behaves in this manner, not mud or other fluids that might have been present on Mars.

Written by: Alfred McEwen (audio by Tre Gibbs)   (14 November 2012)

This is a stereo pair with ESP_037749_1785.

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
Grayscale: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

Grayscale: map-projected (791.3 MB)

IRB color: map-projected (414.0 MB)

Grayscale: map-projected  (364.6 MB),
non-map  (452.9 MB)

IRB color: map projected  (148.5 MB)
non-map  (382.5 MB)

Merged IRB: map projected  (188.7 MB)

Merged RGB: map-projected  (195.2 MB)

RGB color: non map-projected  (358.9 MB)

Map-projected reduced-resolution (PNG)
Full resolution JP2 download
View anaglyph details page

Grayscale label   Color label
Merged IRB label   Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:11 August 2012 Local Mars time: 3:33 PM
Latitude (centered):-1.258° Longitude (East):161.856°
Range to target site:270.3 km (168.9 miles)Original image scale range:27.0 cm/pixel (with 1 x 1 binning) so objects ~81 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:3.6° Phase angle:51.0°
Solar incidence angle:54°, with the Sun about 36° above the horizon Solar longitude:153.3°, Northern Summer
For non-map projected products:
North azimuth:97° Sub-solar azimuth:19.7°
For map-projected products
North azimuth:270°Sub solar azimuth:194.5°

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.