Rippled Surfaces on a Slope in Coloe Fossae
NASA/JPL-Caltech/UArizona
Rippled Surfaces on a Slope in Coloe Fossae
ESP_033599_2160  Science Theme: Mass Wasting Processes
This observation shows us a set of landforms that appears to form a nested “chevron” pattern on a slope in Coloe Fossae. Interestingly, nearby surfaces on the same slope are all parallel.

How do these form? Are they bedforms created by the wind? Why do some slopes have these features and others do not?

Further down the image, we see fretted terrain that’s mostly likely the result of glacial processes. The valley floor offers a stark contrast to the upper slopes and its delicate rippled landforms.

Written by: HiRISE Science Team (narration: Tre Gibbs)  (9 January 2014)
 
Acquisition date
26 September 2013

Local Mars time
14:31

Latitude (centered)
35.778°

Longitude (East)
57.089°

Spacecraft altitude
292.6 km (181.8 miles)

Original image scale range
58.6 cm/pixel (with 2 x 2 binning) so objects ~176 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
0.8°

Phase angle
41.6°

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

Solar longitude
27.3°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  340.1°
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POSTSCRIPT
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.