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Data on detailed geochemical research reveal the specific features of the bottom sedimentation. Changes in sedimentation are caused by climate impact, chemical weathering intensity, distance from the source area, basin redox conditions and many other factors. Values of petrochemical modules (CIA, Fe/Mn, Ba/Sr, Sr/Ca) show changes in physical and geographical conditions and their influence on the sediments composition. Reconstruction of the paleoecological conditions of the environmental development based on geoche...