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Keywords from Image Description:
The Quarterly journal of the Geological Society of London . PKOE LAPWOKTH ON THE GIKVAN SUCCESSION Crazqhead MM Fig Section of Craighead Quarries ' West Quarry ojC Quarry Stinchar Limestone Group Ab Didymograp tusz me Shivery shales with Encrinurus Ampyx Leptana Blue calcareous and slightly carbonaceous shales with Climacograptus