Crater Floor Features
Crater Floor Features
PSP_010057_2040  Science Theme: Sedimentary/Layering Processes
This image shows two features of interest on the floor of a large impact crater. The first is the set of roughly parallel ridges on the crater floor that point towards the crater center north of the image. These may be inverted stream channels, where old streambeds became resistant to erosion due to cementation or simply deposition of large rocks. This is consistent with the slightly wavy, sinuous shape of the ridges, but these examples are not particularly well-preserved.

More recently, this site has become blanketed by dust, settling out after global dust storms. This obscures much of the fine-scale geology, but allows HiRISE to see the effects of a recent process: dust devils. These have left the dark stripes across the surface by disturbing the dust cover. Most followed straight paths, but a few loops or turns are visible. Dust devils may be an important factor in the Martian climate system because they lift dust into the atmosphere, helping to trigger larger dust storms.

Written by: Colin Dundas  (5 November 2008)
Acquisition date
18 September 2008

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
289.1 km (179.7 miles)

Original image scale range
from 29.1 cm/pixel (with 1 x 1 binning) to 58.3 cm/pixel (with 2 x 2 binning)

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
48°, with the Sun about 42° above the horizon

Solar longitude
128.8°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  10.6°
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non-map           (138MB)

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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’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.