Description of manganese nodules and crust collected from the Hakuho Maru Cruise KH-71-1, January-March, 1971, East Mariana, Caroline and Philippine Basins

The cores, dredges and submarine camera observations described in this report were taken on the KH-71-1 Expedition in January-March, 1971 by the Ocean Research Institute, University of Tokyo from the Hakuho Maru. A total of 24 cores, dredges and camera station sites have been recovered.

(Table 2) Isotopic composition of pyrite sulfur in bottom sediments and carbonate nodules from the Gulf of California at Station DM9-666

New data on phosphorites collected by dredging and trawling at depths from 2700 to 520 m in the open Atlantic Ocean (i.e. outside of the shelf and the continental slope) are reported. Aphanitic, granular, brecciated, and conglomerate-like types are distinguished among the phosphorites. A comparison of the studied phosphorites with ones from the Atlantic shelf of Africa and from seamounts of other oceans is made.