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  • Thumbnail for File:P693033.jpg
    |description={{|1=Detail of the Concretionary Limestone Member of the Roker Formation from a coastal exposure near Sunderland [NZ 412 555] (P693033). Plate 49 in ...
    (1,000 × 677 (116 KB)) - 17:03, 12 April 2016
  • Thumbnail for File:P693034.jpg
    |description={{|1=Collapse-brecciated limestone of the Roker Formation produced following dissolution of the underlying Hartlepool Anhydrite. Trow ...
    (1,000 × 675 (182 KB)) - 17:03, 12 April 2016