Split Slope Streak in Unnamed Crater in Arabia Terra
Split Slope Streak in Unnamed Crater in Arabia Terra
PSP_008942_1825  Science Theme: Mass Wasting Processes
The northern slope of this unnamed crater in Arabia Terra exhibits light- and dark-toned slope streaks that are common on Mars.

Most scientists believe that slope streaks are formed by the downslope movement of very dry, fine-grained dust, similar to an avalanche on Earth. Darker slope streaks are thought to be younger than lighter slope streaks.

This image shows a unique dark streak that split around a knob sticking out from the crater wall and then joined back together downslope.

Written by: Jennifer Griffes  (23 July 2008)

This is a stereo pair with PSP_008507_1825.
Acquisition date
23 June 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
267.6 km (166.3 miles)

Original image scale range
26.9 cm/pixel (with 1 x 1 binning) so objects ~81 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
53°, with the Sun about 37° above the horizon

Solar longitude
89.1°, Northern Spring

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  35.6°
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IRB color
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IRB color
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Black and white
map-projected  (343MB)
non-map           (359MB)

IRB color
map projected  (109MB)
non-map           (301MB)

Merged IRB
map projected  (158MB)

Merged RGB
map-projected  (160MB)

RGB color
non map           (276MB)
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

B&W label
Color label
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EDR products

IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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:
NASA/JPL/University of Arizona

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. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.