Late Paleozoic radiolarians from the polyfacies formations of the Uralian Foredeep

Stratigraphic and facies distribution of radiolarians within the interval f rom the Gzhelian Stage of the Upper Carboniferous to the Kungurian Stage of the Lower Permian in the Cis-Ural foredeep are considered. The interrelati on between facies and specific features of radiolarian fauna is analyzed. I n the longitudinal direction, the area of radiolarian distribution is limit ed by the foredeep boundaries. Its latitudinal interval coincides with the southern part of the foredeep below 57 degrees N in the north. It is suppos ed that this latitude bordered the northern thermocline, which served as a paleoclimatic barrier to the dispersal of radiolarian biota northward.