HiRISE | Oxbows and Cutoffs in Idaeus Fossae (ESP_029054

NASA/JPL-Caltech/UArizona

Oxbows and Cutoffs in Idaeus Fossae
ESP_029054_2165 Science Theme: Fluvial Processes

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As rivers age they can meander and occasionally these meanders get so pronounced that the river cuts off these curving loops at their narrow end leaving them as isolated oxbow lakes.

The objective of this observation is to check for the presence of these features. At HiRISE resolution, we should be able to test for traces of former meandering river channels in what looks like an oxbow feature in images from lower-resolution cameras.

Written by: HiRISE Science Team (narration: Tre Gibbs) (28 August 2013)

Acquisition date
07 October 2012

Local Mars time
15:32

Latitude (centered)
36.196°

Longitude (East)
305.990°

Spacecraft altitude
293.7 km (182.5 miles)

Original image scale range
29.6 cm/pixel (with 1 x 1 binning) so objects ~89 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
6.2°

Phase angle
56.6°

Solar incidence angle
62°, with the Sun about 28° above the horizon

Solar longitude
184.4°, Northern Autumn

For non-map projected images
North azimuth: 96°
Sub-solar azimuth: 339.2°

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IRB: infrared-red-blue
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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-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.