"419.0"^^ . . "HELM2"@en . "Helmsdale Granite, Phase 2"@en . . "443.1"^^ . . . "Porphyritic granite. Igneous intrusive bedrock. Occurs onshore. Emplaced during the Silurian Period (443.1-419 Ma BP)."@en . "Helmsdale Granite, Phase 2"@en . "stable"@en . . . . . "Porphyritic granite."@en .