Gold Veins Near Great Falls, Maryland: a Discussion of the History of Prospecting and Mining in the Great Falls Area and a Description of the Gold-Bearing Quartz Veins (Geological Survy Bulletin, 1286)
Excerpt from Gold Veins Near Great Falls, Maryland
Small deposits of native gold are present along an anastomosing system of quartz veins and shear zones just east of Great Falls, Montgomery County, Md. The deposits were discovered in 1861 and were worked sporadically until 1951, yielding more than 5000 ounces of gold. The vein system and the principal veins within it strike 'a few degrees west of north, at an appreciable angle to foliation and fold axial planes in enclosing rocks of the Wis'sahickon Formation of late Precambrian( age.
The veins cut granitic rocks of Devonian or pre-devonian age and may be as young as Triassic. Further development of the deposits is unlikely under present economic conditions because of their generally low gold content and because much of the vein system lies on park property, but study of the Great Falls vein system may be useful in the search for similar deposits elsewhere in the Appalachian Piedmont...
If you're going to spend the money for a trip to these localities, this book is definitely helpful.
32 pgs 1969 B&W photos/illustrations.
Softcover in Very Good Condition: Bindings firm and tight. All pages clean and unmarked, no loose, torn or missing pages. No highlighting, notes, marks, etc.
