The orthogonal pattern of NE and NW striking wrinkle ridges in Hesperia Planum makes this area unique and enigmatic. The wrinkle ridge morphologies revealed in Mars Orbiter Laser Altimeter topography across ridge structures in Hesperia Planum suggest that wrinkle ridges form above thrust faults. The timing relationship among wrinkle ridge sets is evident in the digital elevation models; thrust faults striking NE are older than the NW striking ridges. The NE striking wrinkle ridges show unequal development…
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