"William" . "Fore-arc basalt"@en . "William W Sager" . "Izu-Bonin-Mariana fore arc"@en . "Site U1439"@en . . "e4e1df07ab2c20c6c8e6d9ca58ede97f" . "Site U1440"@en . "IODP"@en . "Paleomagnetism"@en . "International Ocean Discovery Program"@en . "Boninite"@en . "Sager" . "JOIDES Resolution"@en . "Site U1441"@en . "Site U1442"@en . . "Expedition 352"@en .