Meanders and Tributaries in Ridge Form in the Zephyria Region
NASA/JPL/University of Arizona

Meanders and Tributaries in Ridge Form in the Zephyria Region
ESP_024484_1750  Science Theme: Fluvial Processes
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This observation reveals two obvious features. The smaller, narrow ridges oriented vertically are yardangs, which are created by wind erosion; the wind strips away the surrounding terrain, and the ridges remain because they contain more hardened material.

The second feature—the inverted, meandering channel snaking through the image—is caused by similar processes. This was once a river bed that meandered due to changes in topography. As the river flowed, sediments were deposited on its floor, and over time, these sediments became hardened, so when the wind later stripped away the surrounding terrain, the hardened sediments remained, leaving an inverted form.

Written by: Dan Berman   (7 December 2011)

This is a stereo pair with ESP_024985_1750.



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Acquisition date:17 October 2011 Local Mars time: 2:26 PM
Latitude (centered):-5.100° Longitude (East):151.608°
Range to target site:269.6 km (168.5 miles)Original image scale range:53.9 cm/pixel (with 2 x 2 binning) so objects ~162 cm across are resolved
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Emission angle:4.7° Phase angle:42.9°
Solar incidence angle:39°, with the Sun about 51° above the horizon Solar longitude:16.4°, Northern Spring
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North azimuth:97° Sub-solar azimuth:24.0°
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