Fig. 2From: Characterizing the physical properties of rocks from the Paleozoic to Permo-Triassic transition in the Upper Rhine GrabenPhotos of the field locations from which the rock samples were taken. The dominant lithologies at each site are indicated. a Waldhambach, Germany. b Albersweiler, Germany. c Saint Pierre Bois, France. d Saint Pierre Bois, France. Note the fractures present in the granite become arrested at the sandstone–granite interface. e Saint Pierre Bois, France. Note the alternating sandstone and clay units. f Raon l’Etape, France. g Raon l’Etape, FranceBack to article page