"237.0"^^ . "Beechcliff Sandstone"@en . "stable"@en . "Beechcliff Sandstone"@en . "BFS"@en . "Bedrock. Occurs onshore. Formed during the Early Triassic Epoch - to - Ladinian Age (Triassic Period) (251.9-237 Ma BP)."@en . . . "251.9"^^ . . .