"The top of the formation is tectonically truncated by the Moine Thrust Zone."@en . . . "DUR"@en . "Durine Group [Obsolete: use DUR]"@en . "Conformably overlies the Croisaphuill Formation."@en . . "Dolomitic limestone, dolostone and limestone with subsidiary chert. Stratified bedrock. Occurs onshore. Deposited during the Arenig Series - to - Abereiddian Stage (Ordovician Period) (477.1-461.25 Ma BP)."@en . "stable"@en . "Durine Formation"@en . "461.25"^^ . . "Durine Formation"@en . . . "80 m thick, although estimated at 200m by some authors."@en . "Light grey fine-grained dolomitic limestones."@en . . "477.1"^^ .