Scoured Crater Rim
Scoured Crater Rim
PSP_010369_2065  Science Theme: Fluvial Processes
This image shows the scoured, upstream flank of an impact crater within the Kasei Valles outflow channel.

Kasei Valles forms one of the largest outflow channel systems on Mars thought to be carved by enormous floods over a billion years ago. The channel system flows first north and then east, cutting through the Hesperian-aged plains of Lunae Planum and Tempe Terra.

In this image, the channel has diverted around a crater's rim forming a streamlined island that is located near the end of Kasei Valles where it terminates into the lowland plains of Chryse Planitia. The scouring done by the channel flow is visible in this image. However, the triangular-shaped headward extent of the streamlined landform proved particularly resistant to the erosive flow.

Written by: Shawn Hart  (17 December 2008)
Acquisition date
12 October 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
287.0 km (178.3 miles)

Original image scale range
29.0 cm/pixel (with 1 x 1 binning) so objects ~87 cm across are resolved

Map projected scale
25 cm/pixel and North is up

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Phase angle

Solar incidence angle
50°, with the Sun about 40° above the horizon

Solar longitude
140.7°, Northern Summer

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North azimuth:  97°
Sub-solar azimuth:  4.2°
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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.