"North Sannox Grits Formation"@en . "DCNS"@en . "541.0"^^ . "North Sannox Grits Formation"@en . . . . . "Pelite, psammite and semipelite with subsidiary limestone, metalimestone and slate."@en . "1000.0"^^ . . "stable"@en . . . . . "Pelite, psammite and semipelite with subsidiary limestone, metalimestone and slate. Stratified bedrock. Occurs onshore. Deposited during the Neoproterozoic Era (Precambrian) (1000-541 Ma BP)."@en . "North Sannox Grits [Obsolete: use DCNS]"@en .