A Sinuous Ridge South of Moreux Crater
A Sinuous Ridge South of Moreux Crater
ESP_024224_2190  Science Theme: Fluvial Processes
This observation shows a sinuous ridge that may be an inverted stream. Streams can be inverted (become ridges) if they are made of stronger material than their surroundings.

Another way to make high-standing channels is to have water and sediment flow through a channel in the ice at the bottom of a glacier. After the glacier is gone, the sediment can be left behind, forming a ridge called an esker.

This caption in based on the original science rationale.

Written by: HiRISE Science Team (audio by Tre Gibbs)  (20 March 2013)
Acquisition date
27 September 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
293.6 km (182.5 miles)

Original image scale range
59.7 cm/pixel (with 2 x 2 binning) so objects ~179 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
47°, with the Sun about 43° above the horizon

Solar longitude
6.7°, Northern Spring

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  324.6°
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Black & white is 5 km across; enhanced color about 1 km
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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.