GEOLOGICAL CONTROL ON THE OSŁAWA RIVER MEANDER AT DUSZATYN, WESTERN BIESZCZADY MOUNTAINS, POLISH OUTER CARPATHIANS

Włodzimierz MARGIELEWSKI

Institute of Nature Conservation, Polish Academy of Sciences, Al. A. Mickiewicza 33, 31-120 Kraków, Poland; margielewski@iop.krakow.pl

Margielewski, W., 2004. Geological control on the Osława River meander at Duszatyn, Western Bieszczady Mountains , Polish Outer Carpathians. Annales Societatis Geologorum Poloniae, 74: 325-338.

Key words: neotectonics, structural control, Quaternary alluvium, Osława River , Western Bieszczady Mountains , Polish Outer Carpathians.
Abstract: At Duszatyn village (Western Bieszczady Mts.), the Osława River forms an unique meander loop which is not typical for the mountainous area. Detailed analysis has shown that this landform was created due to the evolution of two left-hand tributaries of the Osława River during the formation of its regressive water-gap. These processes were determined by mass movements which have strongly stimulated the fluvial system. The origin of the Osława River meander was largely controlled by lithological differences in rock resistance, orientation of the joint pattern, as well as the presence of bordering oblique and thrust faults which have had a bearing on the diversified neotectonic uplift of the area.
Annales
Societatis
Geologorum
Poloniae

 

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