Annotated record of the detailed examination of Mn deposits from DSDP Site 156, Leg 16 (Core 16-156-1)@en

This site was accidentally spudded on a small basement pinnacle and was abandoned when hard rock was reached within a few meters from the surface. The section penetrated consisted of coarse winnowed calcareous sand over thin chalk ooze resting on a hard crust of ferromanganese oxide presumably covering basalt.