Representative micrographs of Type III samples: (1) polymineralic clast of sapphirine + gedrite showing textural equilibrium between the two phases (redrawn in the inset; cross-polarized light; sample BCOR 72). Areas appearing in brown in the sapphirine crystal correspond to voids generated when the thin section was prepared; (2) millimetric subhedral kornerupine crystal displaying parallel-oriented rutile inclusions (plane-polarized light; sample BCOR 72); (3) peridotite clast. Yellow dotted lines underline the limits of the polymineralic clast (plane-polarized light; sample Momo 1); (4) meta-ophite clast underlined by a red dotted line. Two ultramafic clasts are underlined by yellow dotted lines (plane-polarized light; sample Momo 1); (5) polymictic sandstone exclusively made of monomineralic clasts. A coarse bedding is underlined by planar minerals (black dotted arrows parallel to the bedding; plane-polarized light; sample LHZ 49); (6) polymineralic clast of scapolitite (underlined by an orange dotted line) enclosed in a sandstone made of monomineralic clasts. Note the orientation of the vermiculite flakes, parallel to the borders of the scapolitite clast (plane-polarized light; sample BCOR 73). Abbreviations from Whitney and Evans (2010).