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Name(s) in local language(s): Valle del Bitto di Gerola (Valgerola), Valtellina, Sondrio, Lombardia, Italia
From a geological point of view the valley is part of the Southern Alps: rocks of the Permo-Mesozoic sedimentary cover (Collio Formation, Ponteranica Conglomerate, etc.) crop out only at its head, while the rest of the valley consists of rocks of the pre-Permian crystalline basament, mainly biotite paragneiss ("Gneiss di Morbegno").
Staurolite crystals in association with almandine, biotite, and muscovite are found in mica schist blocks along the streambed (Bedognè et al., 2006).
Mineral ListMineral list contains entries from the region specified including sub-localities
17 entries listed. 12 valid minerals.
Localities in this Region
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
Bedognè, F., Montrasio, A., Sciesa, E. (2006): I minerali della media-alta Valtellina, delle Orobie valtellinesi e della Val Poschiavo. Aggiornamenti sulle altre località della provincia di Sondrio. Bettini, Sondrio, 255 pp.