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Ghiacciaio del Bottarello, Val Loranco, Antrona Schieranco, Antrona Valley, Ossola Valley, Verbano-Cusio-Ossola Province, Piedmont, Italy

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Name(s) in local language(s):Ghiacciaio del Bottarello, Val Loranco, Antrona Schieranco, Valle Antrona, Val d´Ossola, Provincia del Verbano-Cusio-Ossola, Piemonte, Italia

Outcrop of amphibolitized eclogite on the southwestern rim of Ghiacciaio del Bottarello in the Andolla area, upper Val Loranco. It represents a metabasite boudin, several metres thick, embedded in layered impure dolomite and calcite marble. The rock assemblage belongs to the Furgg zone (Bearth, 1952; Wetzel, 1972), an intensely deformed tectonic element of the Western Alps, that here separates the Monte Rosa nappe from the surrounding Bernhard nappe and Antrona ophiolite.

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11 valid minerals.

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- Bearth P.( 1952): Geologie und Petrographie des Monte Rosa. Beitr. Geol. Karte Schweiz (Neue Folge), 96, 94 pp.
- Wetzel R. (1972): Zur Petrographie und Mineralogie der Furgg-Zone (Monte Rosa-Decke). Schweiz. Mineral. Petrogr. Mitt., 52, 161-236.
- Keller L.M., Schmid S.M. (2001): On the kinematics of shearing near the top of the Monte Rosa nappe and the nature of the Furgg zone in Val Loranco (Antrona valley, N. Italy): tectonometamorphic and paleogeographical consequences. Schweiz. Mineral. Petrogr. Mitt., 81, 347-367.
- Liati A., Gebauer D., Froitzheim N. (2001): U-Pb SHRIMP geochronology of an amphibolitized eclogite and an orthogneiss from the Furg zone (Western Alps) and implications for its geodynamic evolution. Schweiz. Mineral. Petrogr. Mitt., 81, 379-393.

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