off Cedros Island, 29 mi. from Natividad Island light, Baja California, Mexico, Pacific Ocean, R/V 'Velero IV' sta. 7229-60 (from 27º24'00''N, 115º12'15''W to 27º23'17''N, 115º13'45''W); 1312-1355 fathoms (= 2400-2478 m), green mud with foraminiferans