"Acklington Dyke"@en . . . . . . . "66.0"^^ . . "stable"@en . "ACKN"@en . "Basalt. Igneous intrusive bedrock. Occurs onshore. Emplaced during the Paleogene Period (66-23.04 Ma BP)."@en . "23.04"^^ . "Acklington Dyke"@en . "Basalt."@en .