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	07 of 21. This image is a mosaic of Olympus Mons. The mosaic was created with the medium-resolution black and white MDIM combined with a low resolution color image mosaic acquired on the 735 orbit of Viking 1 on June 22, 1978. The cental edifice of Olympus Mons has a summit caldera 24 km above the surrounding plains. Surrounding the volcano is an outward-facing scarp 550 km in diameter and several kilometers high. Beyond the scarp is a moat filled with lava, most likely derived from Olympus Mons. Farther out is an aureole of characteristically grooved terrain, just visible at the top of the frame.
	Images courtesy of NASA Copyright (c) 2004, Fookes Software Album made with Easy Imager and Zoomify technology