Back-scattered electron images of dated monazite (Mz) from both samples (AR736 and AR14). Monazites from sample AR736 located in (A and B) Bt-Ms layers, in (C and D) fractures in staurolite and in (E and F) plagioclase. Monazites from sample AR14 with (G) elongated shapes in the foliation, (H) partially replaced by apatite and (I) shape perpendicular to the foliation. Red circles indicate the analytical spots locations. Monazite numbers correspond to Table S5.