Last updated on April 18, 2014 at 11:57 EDT
Brisbane Zs Australean Wrinkle Ridge
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Brisbane Z's Australean Wrinkle Ridge

December 6, 2012
This wrinkle ridge is located within the crater Brisbane Z, at 52.72°S, 73.13°E. Brisbane Z is a mare-flooded crater within Mare Australe. Wrinkle ridges are one of several styles of tectonic deformation present on the Moon, and occur primarily in the maria. Wrinkle ridges are the result of contractional forces, and in the maria, these forces are believed to be from the weight of the basalts extruded onto the surface. The same reasoning explains why wrinkle ridges are sometimes found in mare-flooded craters, where similar contractional forces are present at a smaller scale. A beautiful wrinkle ridge within Brisbane Z crater in Mare Australe. Image width is 500 m and illumination is from the left, LROC NAC M134714924L [NASA/GSFC/Arizona State University].