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Biotite from
Oak Hill Quarry, Westford, Middlesex County, Massachusetts, USA


Locality type:Hill
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 Oak Hill Quarry, Westford, Middlesex County, Massachusetts, USA
Data Identifiers
Mindat Occurrence Record ID:684453
Long-form Identifier:1:3:684453:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
10.3km (6.4 miles) ⓘShaker Quarry, Groton, Middlesex County, Massachusetts, USA
14.1km (8.8 miles) ⓘMcCarthy Quarry, Acton, Middlesex County, Massachusetts, USA
14.1km (8.8 miles) ⓘHarris Quarry, Acton, Middlesex County, Massachusetts, USA
19.9km (12.4 miles) ⓘLedge Road, Windham, Rockingham County, New Hampshire, USA
20.1km (12.5 miles) ⓘRoute 101A construction site, Merrimack, Hillsborough County, New Hampshire, USA
21.0km (13.1 miles) ⓘI-93/Dascomb Rd. area, Andover, Essex County, Massachusetts, USA
24.1km (15.0 miles) ⓘSouhegan Quarry, Milford, Hillsborough County, New Hampshire, USA
24.7km (15.4 miles) ⓘRoute 101/101A road cuts, Amherst, Hillsborough County, New Hampshire, USA
24.9km (15.4 miles) ⓘPJ Keating Quarry (Lunenburg Quarry), Lunenburg, Worcester County, Massachusetts, USA
25.4km (15.8 miles) ⓘBolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA
References
Dale, T. N. (1910). Supplementary Notes on the Commercial Granites of New England (in Contributions to Economic Geology, USGS Bulletin 470).
 
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