The Mineral Resources of the Sea

analyses Weight percentages assays Atlantic Ocean average bromine calcareous oozes California Chemical analyses Weight coast cobalt composition concentration contain continental shelf copper Core costs Crust deep-sea depth diameter Dredge Dredge Dredge drilling DWBG economic elements extraction Foraminifera glauconite Globigerina ooze gold Gulf hydraulic dredge iron Latitude layer locations Longitude magnesium magnetite manganese nodules marine material metals methods million mineral deposits mineral resources mining MURRAY and RENARD nickel ocean floor offshore area operation oxides Pacific Ocean Pb TABLE Station pelagic sediments phillipsite phosphorite phosphorite nodules Photo photograph pipe line placer plant production pump radiolarian ooze recovered red clay Reduced analyſes regions salt salt dome ſampled Chemical Sampler samples sand sea floor sea water sea-floor sediments Sect shells shown in Fig SiO2 submerged sulphur surface surficial tons Trawl Trawl velocity vessel Whole nod X-Sect XXX continued