. "0.0"^^ . . . . "Offshore Artificial Deposits Not Mapped [For Digital Map Use Only]"@en . . "Artifical (anthropogenic) deposits and excavations. Occurs offshore. Formed during the Holocene Epoch (Quaternary Period) (.0118-0 Ma BP)."@en . . "Offshore Artificial Deposits Not Mapped [For Digital Map Use Only]"@en . "stable"@en . . . "ARTOF"@en . "0.0118"^^ . "Offshore Artificial Deposits Not Mapped [For Digital Map Use Only]"@en .