Late Ladinian to Early Carnian Radiolarians from the Section of Pravyi Vodopadnyi Creek, Omolon Massif, Northeastern Russia

Abstract

A late Ladinian to early Carnian radiolarian assemblage was found for the first time in the Pravyi Vodopadnyi Creek Section, Omolon Massif, Northeastern Russia. The assemblage consists of early Carnian radiolarian species that were previously described from sections of Kotelnyi Island (New Siberian Islands) (Glomeropyle aculeatum, G. cuneum, and Pseudoeucyrtis annosus) and species known from the late Ladinian of the Dzugadzak Section (Omolon Massif) (Glomeropyle algidum and Pseudostylosphaera omolonica). The taxonomic composition (dominance of genus Glomeropyle) indicates the high-latitude (boreal) nature of the assemblage. The taxonomic affinity of coeval radiolarian assemblages of the late Ladinian and early Carnian of the Omolon Massif and New Siberian Islands provides the basis for estimation of radiolarian correlation of the boreal Triassic.