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21 December 2012
Friday fold: the Ross Sandstone
The Friday fold is an exposure of the Ross Sandstone in Ireland, bent into a syncline that dives below water.

Callan Bentley is an assistant professor of geology at Northern Virginia Community College in Annandale, Virginia. He is particularly interested in structural geology and the evolution of the Appalachian mountain belt. Callan draws cartoons and writes for EARTH magazine. He lives in the Fort Valley of Virginia.









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