Photomicrographs of apatite types. (A) Authigenic apatite (Ap1) crystals associated with an illite mesh plugging of the intergranular pore (Backscattered electron microscopy imaging) (Sample B-2680, Roemerberg). (B) Authigenic apatite crystals (Ap1) located in a micro cataclastic deformation band (backscattered electron microscopy imaging) (Sample F-3225, Roemerberg). (C) Transmitted polarised light photomicrograph of apatite crystals (Ap2) included in an intergranular pore siderite cement (Sd2) (Sample B-2375, Roemerberg). (D) Cathodoluminescent light photomicrograph of (C).