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Biotite from
Saint-Egarec beach alluvials, Kerlouan, Brest, Finistère, Brittany, France


Locality type:Alluvials
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 Saint-Egarec beach alluvials, Kerlouan, Brest, Finistère, Brittany, France
Data Identifiers
Mindat Occurrence Record ID:442926
Long-form Identifier:1:3:442926:5
GUID (UUID V4):0
Nearest other occurrences of Biotite
5.3km (3.3 miles) ⓘToullouarn quarry, Guissény, Brest, Finistère, Brittany, France
14.2km (8.8 miles) ⓘWrac'h island, Lilia, Plouguerneau, Brest, Finistère, Brittany, France
19.2km (11.9 miles) ⓘGuélet ar C'hoat, Plouguin, Brest, Finistère, Brittany, France
34.3km (21.3 miles) ⓘRocher du Crapaud beach alluvials, Lanildut, Brest, Finistère, Brittany, France
34.8km (21.6 miles) ⓘPoul Morvan beach alluvials, Callot island, Carantec, Morlaix, Finistère, Brittany, France
34.8km (21.6 miles) ⓘPenn ar Waremm beach alluvials, Callot island, Carantec, Morlaix, Finistère, Brittany, France
35.8km (22.3 miles) ⓘIle Verte, Carantec, Morlaix, Finistère, Brittany, France
39.8km (24.7 miles) ⓘRuscumunoc beach alluvial deposits, Ruscumunoc, Plouarzel, Brest, Finistère, Brittany, France
39.9km (24.8 miles) ⓘTrégana beach alluvials, Trégana, Locmaria-Plouzané, Brest, Finistère, Brittany, France
42.4km (26.3 miles) ⓘBlancs Sablons beach alluvials, Le Conquet, Brest, Finistère, Brittany, France
References
Chauris L. (1982), A la recherche des placers littoraux : concentration de sables lourds sur les plages du Nord –Finistère (Massif Armoricain), 107ème congrès des sociétés savantes, Brest, sciences, fasc. III, p. 127 à 129.
 
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