Lesnikova, P.S. 2023. Changes in the Macroelemental Composition of River Waters in Contrast Geological Conditions, Sochi River of the Black Sea Coast of Russia. Proceedings of Voronezh State University. Series: Geography. Geoecology. 3 (Nov. 2023), 47-56. DOI:https://doi.org/10.17308/geo/1609-0683/2023/3/47-56.