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Bitto di Gerola Valley (Gerola Valley), Valtellina, Sondrio Province, Lombardy, Italy

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Name(s) in local language(s): Valle del Bitto di Gerola (Valgerola), Valtellina, Sondrio, Lombardia, Italia
 
Bitto di Gerola valley occupies one of the westernmost portions along the Valtellina slope of the Orobic Alps, just east of Val Lesina. The valley, drained by one of the two branches of Bitto stream, was carved by the erosive action of water and shaped by the movement of ancient glaciers. Almost till the head it is surrounded with steep slopes, then it opens into a magnificent amphitheater with a plenty of ridges, screes, moraines, glacial cirques, Alpine lakes, and meadows.

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 List

Mineral list contains entries from the region specified including sub-localities


17 entries listed. 12 valid minerals.

Localities in this Region

Italy

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References

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.

External Links

www.valgerolaonline.it

www.valgerola.it

 
Mineral and/or Locality  
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