PLANETARY ARCHIVE. A thick stack of sedimentary debris stands in Gale Crater, a possible target for exploration by NASA's Mars Science Laboratory. This view looks southwest, toward the crater's central peak in the left background. (A 4.3 MB version of the image is available.) Credit: NASA/JPL/Arizona State University, R. Luk.
To explore this feature in greater depth, check out Gale Crater's History Book.