By: callanbentley
Image: CB/MAGIC
License: Creative Commons Non Commercial ⧉

Uploaded: 3 Apr 2020
Last Updated: 3 Apr 2020

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An exposure above next to the Fort Valley Road (Rte. 678) just downstream of Blue Hole in the Passage Creek Day Use Area of George Washington National Forest. This is a Silurian quartz arenite deposited under passive margin conditions between the orogenic influences of the Taconian and Acadian Orogenies. Deformation of the unit (folding in the Massanutten Synclinorium) occured during the ultimate phase of Appalachian mountain building, the Alleghanian Orogeny.