It has been found that the section in Mount Pakhkal-Kaya consists of three structural units separated by almost bedding-plane faults presumably arranged in a normal stratigraphic succession: conglomerate succession (I, ?J 3 ox (Oxfordian)), carbonate succession (II, ?J 3 km(Kimmeridgian)-tt(Tithonian)), and a conglomerate-breccia unit) (III, J3km-tt). Each of these successions corresponds to a certain stage of basin evolution, viz., formation of a Gilbert-type delta and the accumulation of a carbonate platform rimmed with a shoal and destruction of the platform margin during its periodic exposures.
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Baraboshkin et al. (2010) studied this question.
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