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Historic mill at the water gap where Broad Run flows across Bull Run Mountain at the eastern Blue Ridge / Culpeper Basin boundary.
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Devil's Racecourse in Ft. Ritchie, MD is a 700-meter-long blockfield created when the area experienced a periglacial climate during the Pleistocene. It is thought that boulders of Weverton quartzite from South Mountain on the west and Catoctin metabasalt from the east weathered out of their respective mountains an...
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LIDAR imagery provided by Dan Doctor, USGS Reston. This map view shows fine-scale topographic variation along the western Blue Ridge front, where the Blue Ridge geologic / physiographic province meets the easternmost Valley & Ridge province (Shenandoah Valley). The most striking feature is the beautiful expressio...
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Geologic map overlay is the 1974 Geologic Map of the Ashby Gap quadrangle, by T.M. Gathright, Jr. and P.G. Nystrom, Jr. You can buy a copy here: www.dmme.virginia.gov/commerce/ProductDetails.aspx?productID=2184
Or you can download a PDF of it here: www.dmme.virginia.gov/commercedocs/RI_36.pdf
The LIDAR...-
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Devil's Racecourse in Ft. Ritchie, MD is a 700-meter-long blockfield created when the area experienced a periglacial climate during the Pleistocene. It is thought that boulders of Weverton quartzite from South Mountain on the west and Catoctin metabasalt from the east weathered out of their respective mountains and wer...
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- Total Views
- 336
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- 1
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Devil's Racecourse in Ft. Ritchie, MD is a 700-meter-long blockfield created when the area experienced a periglacial climate during the Pleistocene. It is thought that boulders of Weverton quartzite from South Mountain on the west and Catoctin metabasalt from the east weathered out of their respective mountains and wer...
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Stats
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- 0
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- 310
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