Geomorphological Characteristics of the Slunj Karst Plateau

Abstract

Cilj ovog rada jest utvrditi temeljne uvjete i procese oblikovanja i razvoja reljefa te njegove opće geomorfološke značajke na prostoru Slunjske zaravni kao primjera prostrane krške zaravni Dinarskoga krša. Kako je geomorfološko kartiranje jedna od najvažnijih metoda geomorfološkog istraživanja, cilj je bio obaviti detaljno geomorfološko kartiranje te izraditi digitalnu geomorfološku bazu podataka. Na temelju dobivenih podataka provedene su geomorfološka analiza i sinteza te je izrađena detaljna digitalna geomorfološka karta tog područja u izvornome mjerilu 1 : 50.000. Razlučeni su dominantni morfogenetski procesi oblikovanja reljefa (strukturnogeomorfološki i egzogeomorfološki) te su utvrđene osnovne etape geomorfološke evolucije reljefa.Ključne riječi: zaravan u kršu, geomorfološko kartiranje, morfometrija, Slunjska zaravan, Dinarski krš, Hrvatska Geomorphological Characteristics of the Slunj Karst PlateauThe research goal has been to determine the basic conditions and processes of the relief formation and development, and to define its general geomorphologic characteristics on the area of the Slunj karst plateau, as an example of spacious plateaus of the Dinaric karst. Since geomorphological mapping is one of the most important methods of geomorphological research, the aim of this work was detail mapping and production of a digital geomorphologic map of the area. As the basis of the given data, geomorphologic analyses and synthesis were worked out and a detailed geomorphologic map to the scale 1:50,000 was made. The dominant morphogenetic processes of the relief formation (structuralmorphologic and exogeomorphologic) were distinguished, and basic stages of the relief geomorphologic evolution were determined. Key-words: karst plateau, geomorphological mapping, morphometry, Slunj karst plateau, Dinaric karst, Croatia UVODZaravni u kršu specifični su reljefni oblik poligenetskog tipa vezan uz karbonatnu podlogu. Prostrane zaravni Dinarskoga krša privlačile su znanstvenike iz mnogih krajeva, pa su upravo ondje nastajale prve teorije o načinu i vremenu postanka zaravni u kršu. U 19. i prvoj polovini 20. stoljeća razvijeno je više teorija, koje se mogu podijeliti na: fluvijalno-erozijske i erozijsko-denudacijske teorije (Penck,

Geomorphological significance of the palaeodrainage network on a karst plateau: The Una–Korana plateau, Dinaric karst, Croatia

“…Geomorphological mapping of several zones within the Una-Korana plateau recorded numerous valley forms without watercoursesknown as dry valleys (Bočić, 2003a;Bočić and Baćurin, 2004;Bočić et al, 2010). On the basis of these findings, a reconstruction of the palaeohydrographic network was made for the entire study area.…”

“…Previous work has demonstrated the suitability of these cartographic sources for this kind of research (eg. Bočić et al, 2010).…”

“…For the purposes of this paper, all parts of the drainage network were divided into three categories (Bočić et al, 2010): active, dry and relict. Active valleys were considered as those with constant or temporary watercourses.…”

“…Monroe, 1976;Jakucs, 1977;Móga, 1999;Selleri, 2007;Bočić et al, 2010). Day (2002) provided an overview of karst valley research (though with an emphasis on tropical areas) and concluded that there is much evidence suggesting that many karst areas once held surface drainage networks.…”

“…In the Quaternary, due to neotectonic movements, the once uniform plateau surface began to break up, and denudation of Neogene deposits began. Bočić et al (2010) studied the geomorphology of the Slunj Plateau, in the southeastern part of the Una-Korana plateau. They noted the importance of the palaeodrainage networks and neotectonic movements on the geomorphological development of the plateau.…”