Manifestation of global events in the Upper Ordovician and Silurian sections of the Northern Urals region

This article presents the study results on the major paleoecosystem reorganizations associated with global biotic, eustatic, and isotopic events, the traces of which have been identified in Upper Ordovician and Silurian carbonate deposits on the western slope of the Subpolar Urals and the Chernov Uplift. The proposed consolidated regional event scale and δ13C isotopic excursion are based on a synthesis of the authors’ data obtained during the study of Upper Ordovician and Silurian reference sections on the western slope of the Subpolar Urals and the Chernov Uplift, supported by the biostratigraphic, sedimentological, and geochemical results.