"HIDO"@en . . . "0.0139"^^ . "0.024"^^ . . . "Hirundo Formation"@en . . . "stable"@en . "Hirundo Formation"@en . . . "Stratified bedrock. Occurs offshore. Deposited during the Marine Isotope Stage 2 (Quaternary Period) (.024-.0139 Ma BP)."@en .