Stratigraphic division of Permian strata in Nileke of Yinin basin in Xinjiang

Permian strata are widely spread with complete sequences and obvious contact relations in Nileke region. It is a typical region for researching Permian strata in west of the Tianshan mountains. Based on analyses of remeasured the five type sections and colleetion of the samples,authors obtained results in researching cycle of volcanic eruption, fossils,facies analysis, and making the detailed stratigraphic division, providing reliable evidences for stratigraphic division and correlation of Permian strata in west of the Tianshan mountains.