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Phlogopite from
McMahon Quarry (Greenspring Quarry), Pikesville, Baltimore County, Maryland, USA


Locality type:Quarry
Classification
Species:Phlogopite
Formula:KMg3(AlSi3O10)(OH)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Phlogopite data
Locality Data:Click here to view McMahon Quarry (Greenspring Quarry), Pikesville, Baltimore County, Maryland, USA
Data Identifiers
Mindat Occurrence Record ID:97065
Long-form Identifier:1:3:97065:7
GUID (UUID V4):0
Nearest other occurrences of Phlogopite
9.9km (6.2 miles) ⓘMartin Marietta Texas Quarry, Cockeysville, Baltimore County, Maryland, USA
11.0km (6.9 miles) ⓘBeaver Dam Quarry (Baker and Connelly Quarry), Cockeysville, Baltimore County, Maryland, USA
15.2km (9.4 miles) ⓘMarriottsville Quarry, Hernwood, Baltimore County, Maryland, USA
15.2km (9.4 miles) ⓘGilmor Quarry, Baltimore County, Maryland, USA
16.2km (10.1 miles) ⓘFrost Quarry, Davis, Howard County, Maryland, USA
32.8km (20.4 miles) ⓘBrighton Dam Road Quarry (Howard-Montgomery Quarry), Howard County, Maryland, USA
72.8km (45.2 miles) ⓘQuarryville Lime and Stone Company Quarry, Quarryville, Lancaster County, Pennsylvania, USA
93.7km (58.2 miles) ⓘNevin's Quarry, Landenberg, London Britain Township, Chester County, Pennsylvania, USA
97.0km (60.3 miles) ⓘHenry Pusey's quarry, Willowdale, East Marlboro Township, Chester County, Pennsylvania, USA
References
Rocks & Minerals 10, 110.
Bernstein, Lawrence R. (1976) Minerals of Washington, D.C. and vicinity. Open-File Report Vol. 76-849. US Geological Survey doi:10.3133/ofr76849
Bernstein, Lawrence R. (1980) Minerals of the Washington, D.C. Area - Issue 5 of Educational series, Maryland Geological Survey. Department of Natural Resources, Maryland Geological Survey. p.1-148.
 
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