The geological setting the mixtites from the Western part of the Krosno zone in the Ukrainian Carpathians is determited more exactly, the classification of these mixtites and the model of forming ones are proposed on the basis of special investigation of the chaotic complexes and geological structure of the region. At the front of the Duklja nappe the two types of the depositional sequenses are distinguished which was named 'autochthonous” and “allochthonous” ones. The first of them is formed of both the Krosno Beds and the sedimentary overlapped these Beds olistostrom (tectono-gravitational mixtite). The second "allochthonous” type represents the deposits of the big olistoplaque from this olistostrom. The chaotic formations of the region are subdivided according to the M.G.Leonov classification into tectonic (melange), gravitational (olistostrom s. str) and tectono-gravitational mixtites. Forming both melange and tectono-gravitational mixtites are related to thrusting Duklja nappe.
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