Image Credit: NASA/JPL/ASU

Context image credit: NASA/JPL/MOLA
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Wrinkle ridges deform the plains in the bottom of Gusev crater, destination of the MER "Spirit" rover. The plains were likely created from a flood basalt with ridges forming where there were compressional forces. Dark wind streaks come together to form a dark spot at the bottom of the image where the wind has removed a thin layer of bright dust off a dark surface. On the left side of the image a portion of a lobe of material is visible, which may have resulted from a mud or debris flow. This feature was recently identified by the THEMIS team and may represent the most recent deposit in the crater involving water.