The bed-by-bed standard of the silurian for East Siberia: Fauna and flora

The bed-by-bed standard of the Silurian for East Siberia is used to correla te stratigraphic sequences all over the Siberian platform and Taimyr. Fossi l faunas and floras of the standard are very representative, because the or iginal type sections of the standard consist of deposits accumulated in sha llow shelf settings favorable for biota evolution. Consecutive beds of the standard are characterized by distribution parameters (abundance rates and size ranges) of the following fossil groups: algae, stromatoporoids, tabula tes, heliolitids, rugose corals, crinoids, gastropods, ostracodes, tentacul itids, bryozoans, conodonts, scolecodonts, bivalves, brachiopods, trilobite s, cephalopods, acritarchs, chitinozoans, and graptolites. The biocoenotic analysis is based on data characterizing the taxonomy and relative abundanc e of fossils in oryctocoenoses, and on the structure of the latter.