Avramenko A.S., Pushkar V.S.
Issues of modern algology 2023; 32(2): 72-75
The fossil diatoms were studied from Neogene siliceous organogenic deposits of Primorye. The taxonomic composition of the diatom flora, to evaluate its qualitative (ecological) and quantitative characteristics were established. Based on analysis of the fossil microfossils features to established the conditions for the formation of rocks and the causes that determined the high productivity of diatoms. The probable causes could be: the development of a dense lake-river network; a long growing season under the conditions of a monsoon climate with mild winters that had formed by that time; active volcanism, the eruption products of which were a source of substances necessary for the maintaining vital activity of diatoms and formation of their valves.
