Fig. 5
a Photograph of outcrop in gallery 98, view direction towards ENE. 1 Mostly undeformed Opalinus Clay sectioned by solitary slickensides, 2 highly fissile scaly clay (=high degree of “scaliness”), 3 S–C band, width up to 10 cm. b Photograph of loose scaly clay microlithons with shiny polished surfaces. c Photograph of a water-immersed sample showing the anastomosing shear-zone network that encapsulates microlithons of various sizes. d BIB–SEM micrograph of the internal structure of a microlithon. The fabric resembles that of undeformed shaly Opalinus Clay. White inset is shown in Fig. 4c