Materials of polygon exploration during Cruise 41 of R/V Dmitry Mendeleev showed that diagenetic and sedimentary-diagenetic nodules close in morphology, texture, and composition vary greatly in size and productivity. Local variations in productivity of this nodule type in pelagic areas of the Pacific Ocean are closely connected with thickness of underlying clayey-radiolarian oozes.
Supplement to: Skornyakova, Nadezhda S; Uspenskaya, Tatyana Y; Kozhevnikova, E G; Matveenkov, Vladimir V (1990): Local variations in distribution, morphology, and composition of nodules from the eastern near-equatorial Pacific. Tikhookeanskaya Geologiya (Pacific Geology), 9(3), 3-8