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Swiss Journal of Geosciences
Fig. 9 | Swiss Journal of Geosciences

Fig. 9

From: A step towards unraveling the paleogeographic attribution of pre-Mesozoic basement complexes in the Western Alps based on U–Pb geochronology of Permian magmatism

Fig. 9

Lawsonite veins in the Guil andesites. a Field aspect of the veins, with fibrous lawsonite localized along the vein walls, or against thin slices of wall rock (andesite) preserved inside the vein, showing several stages of opening. b, c Microphotographs of the vein, both in crossed-polarized light, showing the lawsonite (Lws) needles in a quartz (Qtz) matrix

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