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  • The uppermost Tournaisian to lower Visean limestones (Black Rock Limestone Subgroup) at the base of the Pembroke Limestone Group, form a prominent feature in G ...the Berry Slade Formation, up to 150 m thick, which is not included in the Black Rock Limestone Subgroup. The carbonate mud formed a belt, roughly parallel to the depositional stri
    15 KB (2,153 words) - 09:53, 5 May 2016
  • 17 KB (2,541 words) - 13:53, 2 December 2015