『Abstract
　The article is dedicated to regularities in the distribution of sedimentary phosphorite and manganese deposits in the Lower Paleozoic and Proterozoic formations. Special attention is paid to co-occurrence of phosphate and manganese ores formed during the Vendian-Cambrian shale formation epoch. It is shown that shale formation in certain epochs of the Precambrian and Phanerozoic was determined by the excess influx of carbon and biogenic elements to seas and marginal parts of the oceans and by enhanced productivity of planktonic organisms in corresponding geological periods.』

(Introduction)
Association of P and Mn in Vendian-Cambrian sediments
Association of P and Mn in Proterozoic sediments
Correlation of manganese and phosphorus associations with shale formation epochs
References