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Prehnite from
Percival copper prospects, Douglas County, Wisconsin, USA


Locality type:Prospect
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Percival copper prospects, Douglas County, Wisconsin, USA
Data Identifiers
Mindat Occurrence Record ID:242002
Long-form Identifier:1:3:242002:8
GUID (UUID V4):0
Nearest other occurrences of Prehnite
17.7km (11.0 miles) ⓘChippewa Mine, Douglas County, Wisconsin, USA
22.4km (13.9 miles) ⓘBuckley Quarry, Amnicon Falls, Douglas County, Wisconsin, USA
24.9km (15.5 miles) ⓘJohnson Materials Co. Quarry, Douglas County, Wisconsin, USA
25.1km (15.6 miles) ⓘSouth Range Quarry, South Range, Douglas County, Wisconsin, USA
29.6km (18.4 miles) ⓘSolon Springs Quarry, Douglas County, Wisconsin, USA
30.8km (19.1 miles) ⓘMabel Nelson Road Quarry, Douglas County, Wisconsin, USA
33.0km (20.5 miles) ⓘFond du Lac copper prospect, Douglas County, Wisconsin, USA
36.8km (22.9 miles) ⓘMontrose copper prospects, Bayfield County, Wisconsin, USA
37.8km (23.5 miles) ⓘTalmadge River, Saint Louis County, Minnesota, USA
38.2km (23.7 miles) ⓘFrench River, Saint Louis County, Minnesota, USA
References
Grant, U. S. (1901), Preliminary report on the copper-bearing rocks of Douglas County, Wisconsin, 2nd Ed.: Wisconsin Geological and Natural History Survey Bull. VI Economic Series #3, 83 p.
Dutton, C. E. (1972) Sampling of Copper-bearing Keweenawan Rocks of Northwestern Wisconsin: U.S. Geological Survey Open File Report 9.1267, 13p.
 
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