Transected Wrinkle Ridge in Ophir Chasma
Transected Wrinkle Ridge in Ophir Chasma
PSP_005188_1765  Science Theme: Tectonic Processes
The upper right corner of this observation shows a prominent ridge called a wrinkle ridge. The wrinkle ridge has been transected by the wall of the Ophir Chasma just south of the Martian equator.

Wrinkle ridges are linear to arcuate topographic highs typically consisting of a broad arch topped by a crenulated ridge. They have been identified on the Moon, Mars, Mercury, and Venus. On Mars, they are many tens to hundreds of kilometers long, tens of kilometers wide, and may be several hundred meters high. They are characterized by asymmetrical cross sectional profiles and an offset in elevation on either side of the ridge.

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.

Written by: Maria Banks  (28 November 2007)

This is a stereo pair with PSP_004265_1765.
Acquisition date
04 September 2007

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
262.4 km (163.1 miles)

Original image scale range
26.8 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

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

Solar longitude
308.0°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  336.3°
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

Black and white
map-projected   (946MB)

IRB color
map-projected   (401MB)

Black and white
map-projected  (389MB)
non-map           (535MB)

IRB color
map projected  (130MB)
non-map           (402MB)

Merged IRB
map projected  (222MB)

Merged RGB
map-projected  (227MB)

RGB color
non map           (382MB)
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

B&W label
Color label
Merged IRB label
Merged RGB label
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.