Download or read book Phosphate Deposits of the World: Volume 3, Neogene to Modern Phosphorites written by P. J. Cook and published by Cambridge University Press. This book was released on 1986 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: The origin of marine phosphorites, the principal raw material for phosphatic fertilizers, appears to be related mainly to marine biological productivity, often associated with upwelling currents during certain intervals of geological time. This book examines the environmental setting and resulting phosphorites which formed during the Miocene period, and investigations of modern oceanic environments where phosphorites are presently forming are also described.