Channels and Lava Flows on the Tharsis Plateau
NASA/JPL/University of Arizona

Channels and Lava Flows on the Tharsis Plateau
ESP_020683_2010  Science Theme: Volcanic Processes
French Spanish Portuguese Italian Greek Arabic 



WALLPAPER

800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  

HIFLYER

PDF, 11 x 17 in  
These images and the stereo anaglyph show an interesting region of Mars on the giant Tharsis rise, East of Olympus Mons.

There are well-preserved channels and lava flows. HiRISE has acquired 6 stereo pairs as a mosaic over this area. The science goal is to understand the relationships between channels and lava, which are often closely associated on Mars.

The simplest hypothesis is that the lava carved the channels, but we don't understand how lava can deeply erode into bedrock. The generally favored hypothesis is that water carved the channels, and later eruptions of lava followed the already-carved channels, or maybe lava and water flows were interleaved in time.

Floodwaters on Mars may originate from the subsurface, and require fractures to reach the surface. Lava may exploit these same fractures, and the magma at depth may have melted ice to contribute to the water. On the other hand, the water flood may have been much older than the lava eruptions. The channels appear relatively young, but have been coated by younger lava. Many questions remain about these relationships, and high-resolution topographic data is needed to model the processes and deduce the geologic history.

Written by: Alfred McEwen   (9 February 2011)

This is a stereo pair with ESP_020261_2010.

  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
JPEG
Grayscale: map projected  non-map
IRB color: map projected  non-map
Merged IRB: map projected
Merged RGB: map projected
RGB color: non-map projected

JP2 DOWNLOAD
Grayscale: map-projected (281.5 MB)
IRB color: map-projected (142.2 MB)

JP2 EXTRAS
Grayscale: map-projected  (138.5 MB),
non-map  (125.3 MB)
IRB color: map projected  (57.1 MB)
non-map  (133.5 MB)
Merged IRB: map projected  (258.5 MB)
Merged RGB: map-projected  (237.1 MB)
RGB color: non map-projected  (123.6 MB)

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

ADDITIONAL IMAGE INFORMATION
Grayscale label   Color label
Merged IRB label   Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:25 December 2010 Local Mars time: 3:36 PM
Latitude (centered):20.662° Longitude (East):241.521°
Range to target site:282.3 km (176.4 miles)Original image scale range:56.5 cm/pixel (with 2 x 2 binning) so objects ~169 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:10.6° Phase angle:51.7°
Solar incidence angle:62°, with the Sun about 28° above the horizon Solar longitude:204.7°, Northern Autumn
For non-map projected products:
North azimuth:96° Sub-solar azimuth:340.6°
For map-projected products
North azimuth:270°Sub solar azimuth:155.2°

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
Postscript
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. 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.