The Oldest Magmatic Formation of the Uralides in the North Urals

摘要

The structural relations between the Uralides and pre-Uralides as well as the composition and age of Early Paleozoic geological formations constituting the Uralian fold belt have attracted the attention of many researchers for a long time. In the northern Urals, the Upper Cambrian-Lower Ordovician Al'kesvozh Sequence and Lower Ordovician Tel'pos (Obeiz) Formation are considered to be oldest rocks, which mark the initial stage in development of the Early Paleozoic system of continental rifts that preceded the opening of the paleoocean.