Fig. 6

a b Field aspect of chloritoid micaschist of the Chasteiran Unit (44° 57′ 43.2′′ N–7° 08′ 51.4′′ E and 44° 55′ 18.39′′ N–7° 10′ 55.37′′ E). In the section perpendicular to the foliation (a), numerous quartz veins are parallel to elongate, black, lenses essentially consisting of chlorioid and muscovite (a). The quartz veins are microfolded, with the S₁ schistosity being sometimes preserved at the macroscopic scale. The main, regional foliation is, hower, a composite S_1–2 foliation. Chloritoid flakes are best seen in a surface parallel to the foliation planes (b). Note in both images the scarcity of mm-sized garnet crystals