Chulin Fm

It lies with erosion on various formations of the upper Eocene. In most of the Pre-Tashkent and in the Golodnaya Steppe troughs, on the suite with erosion, the upper Pliocene (Tuzkan Fm) lies.

It is overlain with erosion by pale pink carbonate clays, siltstone (aleurolites), concretionary and nodular limestones and marls of the Irtash Fm (145).

The suite is exposed in the Pre-Tashkent and Golodnaya Steppe troughs. In these troughs, the Ch. suite corresponds to the lower-middle Miocene suite A and the lower part of the section of suite B (without a carbonate crust) of V.A. Zakharovich (1978), undivided Miocene of Ya.M. Kheyfets (1970), middle-late Miocene of N.V. Pitinov (166). It corresponds to the red-colored molasse formation of the Lower TienShan Gr. It is correlated with the Sumzara Fm and Malisay Fm of Fergana, the Sarbatyr Fm and Agitmin Fm of the Kyzylkum, with which it is connected by gradual facies transitions. To the west of the Isfara River, marine Oligocene-lower Miocene deposits of the Sumzara Fm are facies-replaced by continental red beds, which, together with the overlying red beds of the Miocene Malisay suite, form a single lower TienShan Gr. Emerging from the Fergana depression, this series is traced along the northern foothills of Malguzar, and not reaching Zamin, it plunges into the Golodnaya Steppe trough, where it corresponds to the Ch. suite. To the west of the Golodnaya Steppe trough, in the Bayrakum and Ergashkuduk troughs, the lower part of the Ch. suite is facies-replaced by marine Oligocene-lower Miocene deposits of the Sarbatyr Fm, while the aleurolitic-clayey rocks of the upper part of the section of the suite without change are traced further in the Kyzylkum, where they are distinguished under the name Agitmin Fm. In Khorezm, in the eastern part of the Turtkul and Balkuin troughs, red clays and siltstone (aleurolites) of the upper part of the section of the Agitmin suite are interbedded with coastal-marine and lagoonal variegated clays, sandstones, and gypsumites of the Sarmatian (346). East of the Karabiksko-Khivin isthmus, in the Daryalyk-Daudan trough and the southern-eastern Ustyurt, continental deposits of the Agitmin suite are completely facies-replaced by marine formations of the Kotsakhur-Sarmatian. In southern Kazakhstan, in the axial zone of the Syrdarya depression, the Ch. suite corresponds to the lower Miocene Besharyk Fm, composed, like the upper part of the Sarbatyr Fm, of marine red-colored-variegated deposits, and the middle-late Miocene Chilik Fm, distinguished by A.P. Savinova.