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Field views of some outcrops from the FBBSZ. A: Vertical cliff along the river with exposure of highly sheared kinzigites at Oued Ljouj (location: OL, Fig. 4). The Filali gneisses crop out a few ten meters to the left. B: Close view of a lens-shaped boudin of siliceous marble with brittle-ductile pressure-shadows framed in (A). Half arrows: C planes of S/C structures. Walking poles for scale. C: Lower part of the marble outcrop “1b” exposed along the Amter track (see Fig. 5 for location). The ∼20 m-thick lens-shaped 1b outcrop exhibits three main packages of marbles separated from each other by kinzigites. Hammer for scale. Red star: location of Figure 7E. D: Detail of the kinzigite-marble contact framed in (C). Notice the westward sense of shear indicated by the S/C structures. E: Minor marble-kinzigite packages piled up half-way between “1a” and “1b” along the Amter track (Fig. 5 for location). The top of the lowest marble layer “m1” is shown in light blue, the intermediate layers “m2” and “m3” in light orange, the uppermost marble lens “m4” is not stained. Notice the ductile boudinage (b) of the blue and orange layers. F: Steep brittle fault associated with marble breccia (br) and striated mirror (stm).
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