Image Credit: NASA/JPL/ASU

Context image credit: NASA/JPL/MOLA
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This image shows Koga crater, named for a town in Tanzania. It is located in a region called Claritas Fossae, full of large linear features that are not visible in this particular image. What is visible is a mantle of fine material that is draped over much of the terrain, particularly in the floor of the crater. Note how the low-lying surfaces are smooth and dark, covered in this layer of fine material. Sharp blocks and cliffs poke through this mantle, showing that either the mantle never buried all of the underlying topography, or that some of it has eroded away to expose the higher ground.