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Swiss Journal of Geosciences
Fig. 5 | Swiss Journal of Geosciences

Fig. 5

From: Alpine peak pressure and tectono-metamorphic history of the Monte Rosa nappe: evidence from the cirque du Véraz, upper Ayas valley, Italy

Fig. 5

Compilation of field images illustrating the strain gradients in metagranitic lithologies of the Monte Rosa nappe: a weakly deformed porphyritic Monte Rosa metagranite showing biotite wrapping around a large partially recrystallized K-feldspar phenocryst. b Augen gneissic texture of K-feldspar phenocrysts and weakly interconnected biotite schistosity. c Formation of banded gneissic texture with highly strained and connected K-feldspar phenocrysts. d Proto-mylonitic texture with highly strained K-feldspar horizons, presumably former phenocrysts

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