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Biotite from
Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA


Locality type:Mine
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Cornwall Mines (Cornwall Iron Mine), Cornwall Borough (Cornwall), Lebanon County, Pennsylvania, USA
Data Identifiers
Mindat Occurrence Record ID:71736
Long-form Identifier:1:3:71736:8
GUID (UUID V4):de637729-9881-42a1-a620-87f433c359dd
Nearest other occurrences of Biotite
30.3km (18.8 miles) ⓘCounty Line Quarry (Kline's Quarry), Wrightsville, York County, Pennsylvania, USA
37.5km (23.3 miles) ⓘSafe Harbor Quarry, Safe Harbor, Conestoga Township, Lancaster County, Pennsylvania, USA
43.6km (27.1 miles) ⓘGap Mine, Bart Township, Lancaster County, Pennsylvania, USA
44.2km (27.4 miles) ⓘRawlinsville, Martic Township, Lancaster County, Pennsylvania, USA
45.4km (28.2 miles) ⓘGrace Mine, Morgantown, Berks County, Pennsylvania, USA
58.2km (36.1 miles) ⓘCoatesville pegmatite locality, Coatesville, Valley Township, Chester County, Pennsylvania, USA
58.7km (36.5 miles) ⓘFrench Creek Mines, Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
63.0km (39.2 miles) ⓘDinning Rutile prospect, Clermont Mills, Harford County, Maryland, USA
69.2km (43.0 miles) ⓘBenjamin Franklin Mine, Chester Springs, West Pikeland Township, Chester County, Pennsylvania, USA
78.4km (48.7 miles) ⓘOld Perkiomen Mine, Lower Frederick Township, Montgomery County, Pennsylvania, USA
References
 
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