7. Jupiter's Moon, Ganymede (3)

7. Jupiter's Moon, Ganymede (3)

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http://photojournal.jpl.nasa.gov/catalog/PIA02582


NASA's Galileo spacecraft took this image of dark terrain in Nicholson Regio, near the border with Harpagia Sulcus on Jupiter's moon Ganymede. The ancient, heavily cratered dark terrain is faulted by a series of scarps. The faulted blocks form a series of “stair-steps” like a tilted stack of books.
On Earth, similar features form when faults break the crust and the blocks between the faults are pull apart and rotate. This image supports the notion that the boundary between bright and dark terrain is created by that type of faulting.
Image covers an area approximately 16 by 15 km (10 by 9 miles); resolution is 20 meters (66 feet) per pixel; taken on May 20, 2000, at a range of 2090 km (1299 miles).