alternation of shale and fine-grained sandstone / Rock Sedimentary rock

shale, sandstone / Rock Sedimentary rock

sandstone and shale (hornfels) / Rock Sedimentary rock Metamorphic rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

shale / Rock Sedimentary rock

sandstone / Rock Sedimentary rock

sandstone / Rock Sedimentary rock