Mudstone (10 items)

    • P007265
    • Near Pen-gilfach, NW of Llanberis.
    • P007343
    • Penrhyn Slate Quarry, Bethesda.
    • P007808
    • Forest Wood Quarry.
    • P008099
    • Old quarry, overlooking Cwm Safnast....
    • P211672
    • Brookside Interchange, Telford.
    • P222001
    • High Haume.
    • P222695
    • Cauldon shale quarry.
    • P222701
    • Cauldon shale quarry.
    • P223120
    • Railway-cutting SW of Rylstone.
    • P225588
    • Crother's Valley River, 5 km. SSE of...