• The Kulogory Formation consists of three transgressive and regressive cyclites, which are probably similar in structure. Only the middle cyclite is completely represented. The first cyclite consists of regressive part that is composed of white barren mudstones with numerous caverns filled with anhydride. The roof of the mudstone member is topped by rudstone pierced with numerous long, thin rhyzolites. In the western part of exposures, the first cyclite is completely replaced with a thick anhydride member. In Exposure 5, its maximum apparent thickness is about 8 m. The base of the second cyclite is composed of the member of yellow grainstones. Their thickness increases considerably from east to west from 0.3 to 2 m. The grainstones are overlain by white barren mudstones with numerous karst voids filled with anhydride. The thickness of mudstones in Exposures 1, 2, 3, and 4 varies insignificantly. In all sections, the mudstones are overlain by 0.1–0.2 m thick stromatolite limestone. The top of the cyclite consists of a thick anhydride member. The third cyclite is incomplete; its upper part in the eastern part of Exposure 1 is truncated by red deposits of the Vikhtovo Formation and by Quaternary deposits in other exposures. In Exposure 5, the third cyclite is absent. The base of the third cyclite is composed of approximately 0.6-m-thick yellow grainstones, which are overlain by barren mudstones. The latter are highly karstified and often completely replaced with anhydrides.