STRATIGRAPHY AND FORMATION ENVIRONMENTS OF THE UPPER PERMIAN-TRIASSICSEQUENCE IN THE AKSU-KENDYRLI FLEXURE AREA (SOUTHERN MANGYSHLAK)

Based on complex and voluminous geologic-geophysical data, relationshi ps of pre-Jurassic sedimentary sections in the southern flank of the S outhern Mangyshlak depression are outlined. Regional unconformities we re established in the section, the main one of which (pre-late Oleneki an) divides Upper Permian-Triassic deposits into two structural stages . It is shown that the Aksy-Kendyrli flexure comprises three carbonate members of different age (Early, Middle, and Late Triassic), every on e of which is of interest for oil and gas prospecting. Description and correlation of local stratigraphic units are given and their formatio n environments are characterized.