ADVANCES IN RESEARCH OF THE TRIASSIC DEPOSITS IN AZERBAIJAN AND PROBLEMS OF THE PERMIAN-TRIASSIC BOUNDARY
Previously proposed schemes of stratigraphy of the Triassic deposits in Azerbaijan are critically reviewed. Based on detailed analysis of occurrence and development of the Permian-Triassic invertebrates the lower boundary of Triassic in Azerbaijan at the base of strata with Paratirolites is substantiated, correalting them with the Otoceras woodwardi zone. Major problems and tasks in stratigraphy and study of fauna of the Triassic in Azerbaijan are considered. Well-known section located in the region of Darasham railway junction, Nakhchyvan, Azerbaijan, is proposed as a global stratotype point of the Permian-Triassic boundary.