Abstract: New data on the ⁸⁷Sr/⁸⁶Sr ratio variations in carbonate rocks of the Dal’nyaya Taiga Group in the Vendian reference section (Ura Uplift, Central Siberia) are presented. The ⁸⁷Sr/⁸⁶Sr variations correlate with the sequence-stratigraphic scheme reflecting evolution of the paleobasin, δ¹³C variations, and paleontological data. Limestones with a high (>1050 µg/g) Sr concentration, which do not show any signs of alteration of the Sr isotope system, were used for reconstructing the secular ⁸⁷Sr/⁸⁶Sr variations. Increase in the ⁸⁷Sr/⁸⁶Sr ratio from 0.70755 to 0.70823 complicated by subordinate fluctuations was established in seawater during the accumulation of the Dal’nyaya Taiga Group carbonate rocks. Duration of the postglacial deposition of the Dal’nyaya Taiga Group is estimated at no less than 14–15 Ma. Secular variations of the ⁸⁷Sr/⁸⁶Sr ratio measured in the Dal’nyaya Taiga Group limestones are similar to changes of this ratio after the Marinoan glacial period. The Sr and C isotope correlations suggest a prolonged hiatus between the Dal’nyaya Taiga and Zhuya groups.