The paper presents new data on the volume and composition of the Frasnian section exposed in the north-western part of North Timan, as well as the distribution of vertebrate remains and miospore assemblages within it. The deposits studied were formed in the tidal delta environment and span the stratigraphic interval of the Domanikian, Vetlasyanian, and Sirachoian Regional Stages. All three stratigraphic units are characterized by the corresponding miospore assemblages. The vertebrate communities of the Domanikian Regional Stage belong to the Psammosteus megalopteryx psammosteid Zone. The deposits of the Vetlasyanian Regional Stage are extremely poor in vertebrate remains. In the interval of the Sirachoian Regional Stage belonging to the Traquairosteus falcatus and Bothriolepis maxima vertebrate Zones, it is proposed to distinguish the auxiliary local stratigraphic units, the Beds with Bothriolepis volongensis and the Beds with Bothriolepis evaldi.
Beznosov et al. (Sun,) studied this question.