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Biotite from
El Capitan Quarry, Lakeside, San Diego County, California, USA

Locality type:Quarry
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References:SDSU Geology Department unpublished field trip guide, circa 1980.
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view El Capitan Quarry, Lakeside, San Diego County, California, USA
Nearest other occurrences of Biotite
18.2km (11.3 miles) Surprise Mine, Ramona, Ramona Mining District, San Diego County, California, USA
18.6km (11.6 miles) Little Three Mine (Little 3 mine), Ramona, Ramona Mining District, San Diego County, California, USA
18.8km (11.7 miles) Hercules Mine (Beryl claim; Hercules claim; Hercules group; Hercules prospect), Ramona, Ramona Mining District, San Diego County, California, USA
19.0km (11.8 miles) Lookout Mine (Hercules group; Lookout prospect; Upper Hercules mine), Ramona, Ramona Mining District, San Diego County, California, USA
19.1km (11.9 miles) A.B.C. Mine (ABC Mine; Daggett & MacIntosh; Daggett group), Ramona, Ramona Mining District, San Diego County, California, USA
30.8km (19.1 miles) Helvetia Mine, Julian, Julian Mining District, San Diego County, California, USA
34.5km (21.4 miles) Rose Quartz Mine (Patton lode; Patten lode; Powers group; Crystal Quartz; White Quartz; Sante Fe Gem), Mesa Grande, Mesa Grande Mining District, San Diego County, California, USA
35.5km (22.0 miles) Mason Valley Gem claim, Mason Valley, Banner Mining District, San Diego County, California, USA
35.7km (22.2 miles) Himalaya Mine (Himalaya dikes; Himalaya pegmatite), Gem Hill, Mesa Grande Mining District, San Diego County, California, USA
37.2km (23.1 miles) Pacific Mine (Arthur Clay Star Number 1; Standard Sanitary; Pacific Mine Campo; Pacific Sanitary Porcelain Company; Stell; Pacific Feldspar claim), Hauser Canyon, Campo, San Diego County, California, USA
 
矿物 and/or 产地  
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