. "Gleaston Dolomite"@en . . . "GLSD"@en . . "Bedrock. Occurs onshore. Formed during the Guadalupian Epoch - to - Lopingian Epoch (Permian Period) (274.4-251.9 Ma BP)."@en . "stable"@en . "251.9"^^ . . . "Gleaston Dolomite"@en . "274.4"^^ .