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This mosaic image taken by the Mars Exploration Rover Opportunity's panoramic camera shows two regions of the rock outcrop at Meridiani Planum, Mars. The region on the left, dubbed "Charlie Flats," was imaged because it contains an assortment of small grains, pebbles and spherules, as well as both dark and light soil deposits. The region on the right, nicknamed "El Capitan," is where Opportunity is parked and is doing work as of Sol 33 of its mission (February 26, 2004).