Photos: Cool images from Mars
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Credit: AFP/Getty Images
-, SPACE: The upper crust of Mars is layered, and inter-bedded with these layers are old, filled and buried meteor impact craters. In a few places on Mars, such as Arabia Terra, erosion has re-exposed some of the filled and buried craters. This NASA Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image released 03 December, 2003 shows an example. The larger circular feature was once a meteor crater. It was filled with sediment, then buried beneath younger rocks. The smaller circular feature is a younger impact crater that formed in the surface above the rocks that buried the large crater. Later, erosion removed all of the material that covered the larger, buried crater, except in the location of the small crater. AFP PHOTO/NASA (Photo credit should read NASA/AFP/Getty Images)
