The foraminiferal zonal scale of the Devonian-Carboniferous boundary beds in Russia and Western Kazakhstan and its correlation with ammonoid and conodont scalesстатья
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Аннотация:This paper reviews the foraminiferal biostratigraphy of the Devonian Carboniferous (D-C) boundary beds in Russia and Western Kazakhstan. The regional records of the zonal successions of Russia are summarised from sections and boreholes of the Volga-Urals Subregion of the Hast European Platform (Syzran no. 401 Borehole, Melekesskaya no.l Borehole); Timan-Pcchora Province of the East European Platform (Kamenka Section); South Urals (Sikaza, Zigan, Ryauzyak and Dzcrzhinka sections); Middle Urals (Pcrshino Section); and West Siberia, Vagai-Ishim Basin (Borehole no. 1 Kurgan-Uspenskaya), and the zonal successions of Western Kazakhstan arc summarised from the Mugodzhary Mountains. Three foraminiferal biozones can be defined in the interval comprising the latest Devonian and earliestCarboniferous: Quasiendothyra kobeitusana Zone, the Tournayellina pseudobeata remnant Quasiendothyra Zone, and the Earlandia minima Zone. The D-C boundary interval is situated within the Tournayellina pseudobeala-tenMMvM. Quasiendothyra Zone. A correlation with the ammonoid and conodont zonations is proposed, which is useful for correlating deep-water and shallow-water successions.