NEW DATA ON THE RIPHEAN STRATIGRAPHY OF TIMAN

The Upper Riphean biostratigraphic characteristic of the Timan was sup plemented with the new data provided by the drilling of a number of we lls in the Tsil'menskii Kamen' region. Its western sections include ab undant stromatolite beds extending up to the south of northern Timan a nd displaying the complete succession of horizons, from the Yurezan' t o Suleimanovo one, distinguished in the southern Ural stratotype of th e Karatavian. The Sim Horizon with characteristic stromatolite beds yi elding Conophyton garganicus var. ikeni Raab. et Komar and Baicalia ex gr. prima Semikh., was recorded for the first time outside the southe rn Urals. In the local stratigraphic scheme it corresponds to most of the lower part of the Pav''yug Formation. The upper part of this forma tion is characterized by the rich stromatolite assemblage of the Sulei manovo Horizon and boundary sediments of the Minka Horizon. Stromatoli te-bearing carbonate sequences are partly substituted by shaly sedimen ts in southeastern sections of the Tsil'menskii Kamen' region.