. "Aplitic microgranite with subsidiary foliated leucogranite and trace foliated-biotite granite and granitic-rock. Igneous intrusive bedrock. Occurs onshore. Emplaced during the Ordovician Period (486.9-443.1 Ma BP)."@en . "486.9"^^ . "Grantown Granite Pluton"@en . . . . . . "Grantown Pluton [Obsolete: use GRTN]"@en . "443.1"^^ . . "stable"@en . . "Grantown Granite Pluton"@en . . "GRTN"@en .