Adjarian Fm

Includes in Dushanbe-west Shirkent-Luchob, east Shirkent-Luchob

Synonym: Adjarian layers, Акджарские слои

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They are characterized by significant facies variability. In the Dushanbe district, they consist of two packets, which, however, are rarely found together. More often, the lower packet is present, with a thickness of 10-20 m, represented by red-colored clays at the bottom and gray-colored clays, siltstones, and sandstones at the top. The upper packet is composed of gypsum and dolomites, with a thickness of 25-35 m.

In the Vakhsh district, the Adjarian are also dichotomous. The lower package is represented by red-colored clays, siltstones, and sandstones, the upper one - by gypsums and anhydrites. Throughout the section, rare interlayers of dolomites, marls, and limestones occur. Thickness 25-220 m. In the northeast part of the Vakhsh (Peter I ridge) and in the Zaalaysky district, the Adjarian layers correspond to red-colored sandstones and phyllitic clays with interlayers of gypsum, thickness 25-100 m.

In the Kafirnigan district, unlike the above-described red-colored rocks are absent in the Adjarian. These layers are composed here of interbedded gypsums, dolomites, and limestones, and in some points, gypsums prevail, in others - limestones and dolomites. Thickness 50-230 m.

Paleontologically, the Adjarian layers are characterized extremely unevenly. Faunal remains were mainly found in the Kafirnigan district (Kreidenkov, 1963, 1973). On the rest of the territory, they are rare and, in addition, have very poor preservation. The most characteristic for the considered layers are Lucina duponti Cossm., L. montensis Cossm., Corbis montensis Cossm., C. transversaria Cossm., Cardita excellens Gorb., Calyptraea montensis Br. et Corn. Nerita corneti Vinc., Turritella montensis Br. et Corn.