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Biotite from
Curtis Quarry (Southford Quarry; Southford pegmatite; Southbury rose quartz quarry; Bridgeport Woodfinishing Co. Quarry; Hulls Hill), Southford, Southbury, New Haven Co., Connecticut, USA

Locality type:Quarry
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
References
References:Ryerson, Kathleen H. (1972) Rockhouns Guide to Connecticut
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Curtis Quarry (Southford Quarry; Southford pegmatite; Southbury rose quartz quarry; Bridgeport Woodfinishing Co. Quarry; Hulls Hill), Southford, Southbury, New Haven Co., Connecticut, USA
Nearest other occurrences of Biotite
8.5km (5.3 miles) Nonnewaug River Industrial Park, Woodbury, Litchfield Co., Connecticut, USA
10.3km (6.4 miles) Arsenic and nickel mine (Nickel Mine Brook), Seymour, New Haven Co., Connecticut, USA
12.1km (7.5 miles) New England Materials quarry, Monroe, Fairfield County, Connecticut, USA
12.4km (7.7 miles) Green's Farm locality (Roxbury garnet mine; Roxbury Falls garnet mine; Garnet Hill), Roxbury, Litchfield Co., Connecticut, USA
18.3km (11.4 miles) U. S. Route 7 Expressway (Danbury line to Iron Works District), Brookfield, Fairfield County, Connecticut, USA
18.4km (11.4 miles) Old Mine Park (Old Tungsten Mine), Long Hill, Trumbull, Fairfield County, Connecticut, USA
19.1km (11.9 miles) Rockside Quarry (Mine Hill Quarry), Mine Hill (Ore Hill), Roxbury, Litchfield Co., Connecticut, USA
19.9km (12.4 miles) Agstone Company Limestone Quarry, Danbury, Fairfield County, Connecticut, USA
21.0km (13.1 miles) Interstate 84 interchange 26, Cheshire, New Haven Co., Connecticut, USA
21.3km (13.2 miles) Kyanite locality (Judds Bridge locality), Washington, Litchfield Co., Connecticut, USA
 
Mineral and/or Locality  
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