Mine des Sards outcrops. (a) Picture of two normal faults spreading in the cliff, shifting the unconformity. (b) Picture of the cliff showing B.U. to SU2 and the non-spreading of NE-SW and NNW-SSE faults from B.U. above the unconformity. (c) Interpreted orthoimage of the rocky shelf with weighted rose diagram. (d) Orthoimage extract showing a dextral brittle deformation of the foliation (underlined in red) by WNW-ESE faults in B.U. (e) Orthoimage extract showing conjugate faults shifting a syn-foliation quartz dike (underlined in red). (f) Orthoimage extract showing a NE-SW fracture abutting on NNE-SSW faults. (g) and (h) pictures of stratiform karsts from the Mine des Sards in the silicified SU2 with barite and quartz mineralization on the karst walls. See Table 1 for brittle structure nomenclature.