July 9, 2008—An image released last week taken by the Mars-orbiting HiRISE camera shows both terrestrial and extraterrestrial impacts on the Martian landscape.

The region is bisected by a graben—a block of rock that has dropped down between two faults as the planet's crust pulls apart. Pit crater chains along the graben formed as material collapsed into the subsurface void.

The surrounding region is also dotted with impact craters as wide as three miles (five kilometers). Some craters display patterns of ejecta radiating outward.

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