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Swiss Journal of Geosciences
Fig. 7 | Swiss Journal of Geosciences

Fig. 7

From: Geology along the Bedretto tunnel: kinematic and geochronological constraints on the evolution of the Gotthard Massif (Central Alps)

Fig. 7

Thin section cutouts of RG1 (a–e) and RG2 (f), crossed polarized light in all photomicrographs. Mineral abbreviations according to Whitney and Evans (2010) (this is also valid for subsequent figures with photomicrographs and will no longer be mentioned). The italic roman numbers correspond to descriptions related to dynamic recrystallization (Sect. 3.2.4): (i) magmatic quartz with grain size \(>4\) mm showing undulose extinction, (ii) dynamically recrystallized quartz in coarse-grained domain, (iii) pinning structure in coarse-grained domain, (iv) ‘left-over’ grain in coarse-grained domain, (v) irregular grain-boundary in coarse-grained domain, (vi) ‘left-over’ grain in coarse-grained domain, (vii) slightly elongated grain in fine-grained domain, (viii) potential pinning of quartz by the indicated white mica grain, (ix) coarse-grained domain in a RG2 sample

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