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Serizzo Monte Rosa
Granitic augen gneiss with centimetric K-feldspar porphyroclasts surrounded by discontinuous layers of biotite. The foliation planes are irregularly distributed. It is the coarsest and lightest coloured variety of Serizzo. Mineralogiocal composition: quartz, K-feldspar, plagioclase (An 25-30%), biotite and rare muscovite. |