![](http://www.alamy.com/thumbs/6/A29D27AB-84C3-4534-B6C9-BC157C9D06B1/2K5E6BJ.jpg)
Martian landscape. This HiRISE image shows a crater in the Tyrrhena Terra region and a set of star dunes visible on the western edge of a small crater within the larger target crater. Star dunes form when sand is blown by winds coming from multiple directions, common in craters. This results in intersecting dunes, forming a polygonal, or 'star' pattern. The dune sands are most likely made of basalt. Possible clay-bearing material is probably within the surrounding bedrock. Image shows terrain less than 5 km (3 mi) across. A unique optimised version of NASA imagery. Credit: NASA/JPL/UArizona
Size: 10240px × 4310px
Location: Mars, Tyrrhena Terra
Photo credit: © NASA / digitaleye / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 10k, abstract, barren, basalt, black, crater, desert, deserted, digitaleye, dune, dunes, geology, geomorphology, hirise, horizontal, imaging, landform, landscape, mars, martian, misc22_nasa371, monochrome, nasa, panorama, panoramic, planet, remote, sandstone, science, star, surface, terra, terrain, texture, topography, tribaleye, tyrrhena, uahirise, white