Results of joint research on macrofauna and conodonts are presented in
the paper. Based on new data, the relationship between conodont and r
egional zones was established for the first time, and boundaries betwe
en the stages under consideration were refined. The Mongolian sequence
s were correlated with reference sections of the Salair. The available
data made possible wide interregional correlations of Mongolian secti
ons characterized by endemic fauna.