engleski

Geological and geomorphological conditions for karst and cave development in the NE peripheral zone of Dinaric karst (Dunjak area, Croatia)

Dunjak area is located in the transitional zone between the Dinaric Karst and Peri-pannonian part of Croatia. Geomorphological, this area is a transitional zone between the karst area in the southwest and fluvial in the northeast. The studied area is composed of the Lower Triassic sedimentary rocks dominated by mica sandstones and carbonates (limestones and dolomites). The aim of the research was to determine the fundamental geological and geomorphological features as well as the conditions of the development of the surface and underground karst formations in the study area. It has been found that the investigated area fluvio-karstic characteristics developed by karstification processes and reorganization of the previous surface drainage network. Determined surface karst and fluvio-karst forms are: blind valleys, dry valleys and sinkholes. The most important underground form is the Dunjak cave – an inactive karst conduit. Geomorphological map of the area and the Dunjak cave map with geological and geomorphological features were also done. The basic stages of development of surface and underground karst features were determined.

karst; fluviokarst; speleology; geospeleology; speleogenesis; Croatia

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