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Biotite from
U.S. highways 16/385 & State route 87 intersection area, Oreville Mining District, Pennington County, South Dakota, USA


Locality type:Area
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:Confirmed
Confirmation Methods:Visually Identified
Associated Minerals Based on Photo Data:
Sillimanite4
Muscovite4
Andalusite4
Graphite3
Quartz1
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view U.S. highways 16/385 & State route 87 intersection area, Oreville Mining District, Pennington County, South Dakota, USA
Data Identifiers
Mindat Occurrence Record ID:858760
Long-form Identifier:1:3:858760:2
GUID (UUID V4):0
Nearest other occurrences of Biotite
1.2km (0.7 miles) ⓘReinbold Claim (Tungsten No. 1-3 Claims), Hill City Mining District, Pennington County, South Dakota, USA
2.3km (1.4 miles) ⓘTin Queen Mine (White Blowout Mine), Hill City Mining District, Pennington County, South Dakota, USA
3.5km (2.1 miles) ⓘOreville, Custer County, South Dakota, USA
5.2km (3.3 miles) ⓘBlack Elk Peak (Harney Peak), Pennington County, South Dakota, USA
5.3km (3.3 miles) ⓘHill City Mining District, Pennington County, South Dakota, USA
5.4km (3.4 miles) ⓘLake Mica Prospect (Lakeside), Unorganized mining district [1], Custer County, South Dakota, USA
5.7km (3.5 miles) ⓘGold Medal Group (Golden Summit Group), Hill City Mining District, Pennington County, South Dakota, USA
7.0km (4.4 miles) ⓘKirka Claim (Downing Claim), Unorganized mining district [1], Custer County, South Dakota, USA
11.4km (7.1 miles) ⓘSunshine Mica Prospect, Custer Mining District, Custer County, South Dakota, USA
11.4km (7.1 miles) ⓘBig Horn Lode Prospect, Custer Mining District, Custer County, South Dakota, USA
References
E.L. Clopton collection
 
and/or  
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