Cayola Bay outcrop. (a) Interpreted UAV orthoimage of the S.E. side of the NW-SE oriented Cayola bay graben with fault motions reported and weighted rose diagram. (b) Orthoimage extract showing dextral ductile-brittle deformation of the aplo-pegmatitic dike (underlined in red) by NNW-SSE to N-S faults on the rocky shelf. (c) UAV Orthoimage extracts showing a sinistral deformation of the dike by NNE-SSW faults. (d) and (e) coastal cliff picture and interpretation of the normal faults shifting the unconformity and associated silicification of the cover. See Table 1 for brittle structure nomenclature.