The chaotic formations of the south-western part of the Krosno zone are the products of forming and evolution of the Dukla nappe (Ukrainian Carpathians)
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.