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Comments on Gigapan: Antietam Breccia 1

  2. This is an outcrop of brecciated quartzite located along the Shenendoah River near Ashby Gap Virginia. The quartzite is from the Cambrian Antietam formation, the upper most clastic unit of the Blue Ridge stratigraphic stack. The Antietam formation is interpreted as a beach/barrier island sand at the top of a transgress...

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