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The Quarterly journal of the Geological Society of London . Qaart Journ Geol Soc Vol XLI Pl TeiD aa JVWatsan del DOLERITE Al HORI BLZITDE SCHIST ft Uso Sro Dou 'Uls Zuk Strrrvu Xarrt Pl II Illustration biodiversitylibrary org Geological Society of London Biodiversity Heritage Library The Quarterly journal of the Geological