On the Formation and Transformation of Siliceous Sequences. Brief Analysis of Some Publications

The article analyzes the influence of endogenous processes – volcanism during the sedimentation stage and hydrothermal impact on rocks during catagenesis – using the example of siliceous and clayey-siliceous deposits of Western Siberia, which are described in a series of publications. Arguments against such interpretation are presented, and alternative concepts regarding the formation of such sequences through biogenic sedimentation are outlined. The sharp intensification of biochemical weathering during the Cretaceous period led to the transport of dissolved silica masses into the World Ocean, ultimately triggering the development of organisms with siliceous function and, consequently, silica accumulation.