HiRISE | Fine-Branched Ridges (ESP_024497

NASA/JPL-Caltech/UArizona

Fine-Branched Ridges
ESP_024497_1745 Science Theme: Fluvial Processes

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This image shows numerous branching ridges with various degrees of sinuosity. These branching forms resemble tributaries funneling and draining into larger channel trunks towards the upper portion of the scene.

The raised relief of these branching ridges suggests that these are ancient channels are inverted due to lithification and cementation of the riverbed sediment, which made it more resistant to erosion than the surrounding material. Wind-blown bedforms are abundant and resemble small ridges that are aligned in an approximately north-south direction.

Written by: Austin S. Guynn and Marjorie A. Chan (narration: Tre Gibbs) (14 October 2015)

This is a stereo pair with PSP_007474_1745.

Acquisition date
18 October 2011

Local Mars time
14:19

Latitude (centered)
-5.385°

Longitude (East)
154.611°

Spacecraft altitude
268.3 km (166.8 miles)

Original image scale range
61.3 cm/pixel (with 2 x 2 binning) so objects ~184 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
30.1°

Phase angle
65.0°

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

Solar longitude
16.9°, Northern Spring

For non-map projected images
North azimuth: 96°
Sub-solar azimuth: 28.7°

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map projected  non-map

IRB color
map projected  non-map

Merged IRB
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Merged RGB
map projected

RGB color
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JP2
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IRB color
map-projected   (173MB)

JP2 EXTRAS
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map-projected (162MB)
non-map           (148MB)

IRB color
map projected (66MB)
non-map           (140MB)

Merged IRB
map projected (364MB)

Merged RGB
map-projected (332MB)

RGB color
non map           (130MB)

ANAGLYPHS
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Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
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EDR products
HiView

NB
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

USAGE POLICY
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-Caltech/UArizona

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.