Strange Cones and Flows
NASA/JPL/University of Arizona
Strange Cones and Flows
ESP_037222_1820  Science Theme: Aeolian Processes
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The north end of this long image shows a lava surface in southern Elysium Planitia. Small cones are common on the extensive young flood lavas in this region.

Here, the cones are larger than usual, perhaps approaching cinder cone sizes. What's really odd here is that the cones are associated with lighter areas with polygonal patterns. Such polygons are commonly visible on the denser portions of lava flows, while the rougher areas have more broken-up low-density crust.

But the shapes of these regions are unusual, and the association with cones suggest that the cones were source vents for local lava flows. Other interpretations are also possible.

Written by: Alfred McEwen (audio: Tre Gibbs)   (13 August 2014)

This is a stereo pair with ESP_042141_1820.

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Acquisition date:05 July 2014 Local Mars time:15:34
Latitude (centered):1.808° Longitude (East):147.335°
Range to target site:288.0 km (180.0 miles)Original image scale range:57.6 cm/pixel (with 2 x 2 binning) so objects ~173 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:19.8° Phase angle:73.0°
Solar incidence angle:54°, with the Sun about 36° above the horizon Solar longitude:156.7°, Northern Summer

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