Merging Lobate Debris Aprons of Deuteronilus Mensae
NASA/JPL/University of Arizona

Merging Lobate Debris Aprons of Deuteronilus Mensae
PSP_009535_2240  Science Theme: Glacial/Periglacial Processes
Spanish Greek 



WALLPAPER

800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  
This image lies within the Deuteronilus Mensae region, located on the northern edge of Arabia Terra and borders the high-standing, heavily cratered Southern Hemisphere and the low, relatively uncratered, plains of the Northern Hemisphere of Mars.

Deuteronilus Mensae is characterized by hills and mesas surrounded by broad debris aprons and this HiRISE image shows examples where lobate-shaped debris aprons appear to overlap.

There is zone of ridges that formed in an area where lobate debris aprons merged from different directions. A current hypothesis is that these ridges are expressions of compressional deformation between two lobes acting like a viscous fluid. One possibility, given the high latitude of the occurrence, is that the lobes of debris are ice-rich and flow somewhat like glaciers.

Recent results from the SHAllow RADar (SHARAD) instrument, also onboard the Mars Reconnaissance Orbiter, indicate that lobate debris aprons in Deuteronilus Mensae are composed of material dominated by ice (Plaut et al., 2008). This supports the interpretation that these might be potential debris-covered glaciers or rock glaciers.

Some of the detailed textures on the surface of the debris aprons are commonly believed to be the result of ice loss due to sublimation (ice changing into water vapor). On Earth, debris-covered glaciers/rock glaciers typically develop wrinkles and fractures due to stresses in the ice as it flows. Where flows merge, they can buckle and push up ridges producing features similar to those visible here.

Written by: Maria Banks   (1 October 2008)

This is a stereo pair with PSP_008744_2240.

  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 (873.7 MB)
IRB color: map-projected (404.0 MB)

JP2 EXTRAS
Grayscale: map-projected  (452.2 MB),
non-map  (342.9 MB)
IRB color: map projected  (158.4 MB)
non-map  (292.9 MB)
Merged IRB: map projected  (228.8 MB)
Merged RGB: map-projected  (235.1 MB)
RGB color: non map-projected  (273.0 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:08 August 2008 Local Mars time: 3:09 PM
Latitude (centered):43.767° Longitude (East):29.377°
Range to target site:313.5 km (196.0 miles)Original image scale range:31.4 cm/pixel (with 1 x 1 binning) so objects ~94 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:17.3° Phase angle:60.9°
Solar incidence angle:44°, with the Sun about 46° above the horizon Solar longitude:109.8°, Northern Summer
For non-map projected products:
North azimuth:98° Sub-solar azimuth:354.6°
For map-projected products
North azimuth:270°Sub solar azimuth:168.9°

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.