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May 25, 2013 | 10:33 pm
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Grand Canyon

Mike Sakal/Tribune | Posted: Thursday, April 19, 2012 4:17 pm

Different colors: Slightly different colors separate a point overlooking Bright Angel Trail in the Grand Canyon. The top lighter layer is Coconino Sandstone and the bottom layer is Hermit Shale. [Mike Sakal/Tribune]

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