Solomon Maksim Valerievich RussiaSaratovSaratov State University, 83, Astrakhanskaya Str., Saratov, 410012, Russiastudentsolomonmv@list.ru Author's articles Typomorphism of Clastogene Quartz from the «Melovatka-5» and «Melovatka-6» Sections (the Cenomanian from the Southeast of the Russian Plate) Insoluble remains of Lower Permian sylvinite rocks in the western and north-western framing of the Caspian depression