Aeolian Features of Scandia Cavi
NASA/JPL/University of Arizona
Aeolian Features of Scandia Cavi
ESP_017426_2570  Science Theme: Polar Geology


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This HiRISE image shows modified barchan dunes with shapes that resemble “raptor claws.” The unusual morphology of these dunes suggests a limited supply of windblown sand.

Winds likely blew from the northeast resulting in elongate dunes with an asymmetric downwind point. The transverse crests of the smaller ripples/mega-ripple bed-forms surrounding the dune, echo the dominant downwind direction towards the southwest.

This locality is in the Northern Lowlands directly east of Dokka Crater in Scandia Cavi.

Written by: Shirley (Sunny) Rosendahl and Marjorie A. Chan   (30 September 2015)

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Acquisition date:15 April 2010 Local Mars time:14:26
Latitude (centered):76.931° Longitude (East):226.626°
Range to target site:317.3 km (198.3 miles)Original image scale range:31.7 cm/pixel (with 1 x 1 binning) so objects ~95 cm across are resolved
Map projected scale:25 cm/pixelMap projection:Polarstereographic
Emission angle:0.2° Phase angle:55.3°
Solar incidence angle:55°, with the Sun about 35° above the horizon Solar longitude:77.8°, Northern Spring

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