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Friday fold: Quartz vein in Catoctin Formation, Point of Rocks, Maryland

Source info:

Author:
Date: 2014-09-12 13:41:09
Blog: Mountain Beltway
URL: http://blogs.agu.org/mountainbeltway/2014/09/12/friday-fold-quartz-vein-catoctin-formation-point-rocks-maryland/

Summary:

I took this image in 2005, when I was working up a geologic history of the C&O Canal National Historical Park. It’s a vein of quartz, gracefully folded within the Catoctin Formation. The exposure is along the railroad tracks at Point of Rocks, Maryland, easternmost extent of the Blue Ridge province on the north shore of the Potomac River. The Culpeper Basin begins about 100 meters to the east of …

Content analysis:

Stratigraphic context:

Recognized stratigraphic terms [n]:Catoctin Formation [2]
Agenames chronostratigraphy [rating]:Lower Cambrian [0.33]
Cambrian [0.33]
Paleozoic [0.33]
Phanerozoic [0.33]
Proterozoic [0.33]
Precambrian [0.67]

Geographic context:

LocationCountryLatitudeLongitude
Blue RidgeUS37.3783-79.8206
CulpeperUS38.4701-78.0011
Point of RocksUS39.2781-77.5292
Potomac RiverUS38.7935-77.0325
CatoctinUS39.5732-77.4325
North ShoreCA46.2124-82.5739

Keywords:

blue ridge, Blue Ridge province, C&O Canal National, Catoctin Formation, Culpeper Basin, easternmost extent, exposure, Friday fold, geologic history, Historical Park, Maryland, meters, north shore, Point, Potomac River, Quartz vein, railroad, Rocks

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