Wrinkle Ridge in Solis Planum
Wrinkle Ridge in Solis Planum
PSP_006494_1535  Science Theme: Tectonic Processes
This observation shows a wrinkle ridge in the Solis Planum, a region of Mars that is a high-elevation volcanic plain located south of the Valles Marineris canyon system and east of the Tharsis volcanic complex. In the Solis Planum, wrinkle ridges are typically spaced apart roughly 40 kilometers (25 miles).

Wrinkle ridges are linear to arcuate positive relief features and are often characterized by a broad arch topped with a crenulated ridge. These features have been identified on many bodies such as the Moon, Mercury, and Venus. On Mars, they are many tens-to- hundreds of kilometers long, tens of kilometers wide, and have a relief of a few hundred meters. Wrinkle ridges are most commonly believed to form from horizontal compression or shortening of the crust due to faulting and are often found in volcanic plains.

Wrinkle ridges commonly have asymmetrical cross sectional profiles and an offset in elevation on either side of the ridge. The ridge in this image (see subimage) appears to have a steeper southeast facing slope and a more gentle northwest facing slope. Some layering is also apparent in the ridge. Large dunes border the ridge to the north.

The reddish colors visible in the color image most likely indicate the presence of dust (or indurated dust).

Written by: Maria Banks  (9 January 2008)
Acquisition date
15 December 2007

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
250.7 km (155.8 miles)

Original image scale range
25.1 cm/pixel (with 1 x 1 binning) so objects ~75 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
45°, with the Sun about 45° above the horizon

Solar longitude
2.9°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  36.5°
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Black and white
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non-map           (1031MB)

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Merged IRB
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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’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.