This article is about a new technique of transgressive-regressive cycles detection, based on ESRspectroscopy of manganese lines in dolomite. <...> Kazan (Volga region) Federal University R. I. Kadyrov, Ph.D. student of chair of regional geology and mineral resources Rail7777@gmail.com R. Kh. <...> Sc. in geology, associate professor of chair of regional geology and mineral resources Rafael.Sungatullin@ksu.ru N. M. Nizamutdinov, Dr. <...>