Memoir, العدد 154

accumulation rates America Bulletin assemblages axial basalts basement bathymetric Bauer Basin Bauer Deep biogenic boundary carbonate Cenozoic Chile composition continental margin continental shelf continental slope cores crustal deposits detrital dredge Dymond Earth and Planetary East Pacific Rise Easter plate eastern elements factor faults ferromanganese Figure foraminifera Fracture Zone Galapagos Rise Geological Society Geophysical Research gravity anomaly Hussong hydrothermal indicate isotopic km/sec Kulm landward layer Lima Basin lithosphere locations magma magnetic anomalies mantle melting metalliferous sediments minerals Nazca plate Nazca Ridge nodules oceanic crust oceanic plate offset Oregon State University oxides pelagic sediments Peru-Chile Trench Pisco Planetary Science Letters ratios reflectors refraction region rise crest rocks samples sea floor sea water seaward sedimentary smectite Society of America southern Peru spreading center structure subduction suggest surface tectonic thickness trench axis triple junction turbidites upper upper-slope uranium velocity volcanic volume