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12 June 2014

Slickensides in the Vulcan Quarry, Manassas, Virginia

While at the Vulcan Quarry in Manassas, Virginia, a few weeks ago, the principle interesting feature I saw on the individual blocks of rock we sorted through was slickensides. I saw dozens and dozens of examples, in both the hornfels and the diabase, but here are five nice examples to share: No sense of scale on this last one, because I didn’t feel safe edging up to the quarry wall …


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