ON POSSIBILITY OF USING THE GLOBAL PERMIAN STAGE SCALE IN THE TETHYAN REGION

Abstract

A possibility of using the Permian global chronostratigraphic scale in the Tethyan region is estimated in this work. Permian successions in this region show that the proposed subdivision of the Permian System into the Cisuralian, Guadalupian, and Lopingian series is efficient when it is definitely proved that the lower boundary of the Guadalupian Series corresponds to the base of the Kubergandian Stage of the Tethyan scale. This problem is, however, unsolved so far. The Asselian, Sakmarian, and Artinskian stages of the Cisuralian Series correspond to the Asselian, Sakmarian, and Yakhtashian stages of the Tethyan scale. The correlation between the Kungurian and Bolorian stages can be taken for testified, when the exact position of the lower boundary of the Guadalupian Series is established. The conodont biostratigraphy used to discriminate the Roadian, Wordian, and Capitanian stages of the Guadalupian Series is inappropriate for the Tethyan region. The Wuchapingian and Changhsingian stages of the Lopingian Series correspond to the Dzhulfian (sensu stricto) and Dorashamian stages of the Tethyan scale.