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Biotite from
Crugers Emery Mine, Montrose, Cortlandt Township, Westchester Co., New York, USA

Locality type:Mine
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:The Minerals of New York City & Its Environs, New York Mineralogical Club Bull., Vol. 3, No. 1, Manchester, J.G. (1931): 70.
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Crugers Emery Mine, Montrose, Cortlandt Township, Westchester Co., New York, USA
Nearest other occurrences of Biotite
8.7km (5.4 miles) Forest of Dean Mine, Fort Montgomery, Town of Highlands, Orange Co., New York, USA
8.7km (5.4 miles) Philips Mine (Philips Pyrite Mine; Anthony's Nose Pyrrhotite Mine), Anthony's Nose, Philipstown Township, Putnam Co., New York, USA
11.3km (7.0 miles) Beechy Bottom Mine, Bear Mountain State Park, Rockland Co., New York, USA
16.1km (10.0 miles) Greenwood mine (Patterson mine), Town of Tuxedo, Orange Co., New York, USA
16.7km (10.4 miles) Hogencamp Mine, Town of Tuxedo, Orange Co., New York, USA
19.5km (12.1 miles) Greenwood Furnace, Arden (Greenwood), Orange Co., New York, USA
19.5km (12.1 miles) Mount Taurus Quarry (Mt Taurus Quarry; Bull Hill Quarry; Verplanck Quarry), Cold Spring, Town of Philipstown, Putnam Co., New York, USA
22.1km (13.7 miles) O'Neil Mine (Nail Mine), Lake Mombasha, Town of Monroe, Orange Co., New York, USA
23.4km (14.5 miles) Valhalla, Mount Pleasant, Westchester Co., New York, USA
23.6km (14.7 miles) VIllage of Monroe, Town of Monroe, Orange Co., New York, USA
 
Mineral and/or Locality  
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