. . . "Diorite, granite, granitic-rock, microdiorite, porphyritic microgranite and porphyritic microgranodiorite with subsidiary trachytic-rock and trace felsite and microgranodiorite. Igneous intrusive bedrock. Occurs onshore. Emplaced during the Ludlow Epoch (Silurian Period) - to - Early Devonian Epoch (Devonian Period) (426.7-394.3 Ma BP)."@en . "Unnamed Igneous Intrusion, Late Silurian To Early Devonian"@en . . "UISD"@en . . "394.3"^^ . "Unnamed Igneous Intrusion, Late Silurian To Early Devonian"@en . "426.7"^^ . "stable"@en .