The “Orešje” Laramian Structure in the NE part of Medvednica Mt. (Croatia)

Abstract

Structural features of Upper Triassic and Upper Cretaceous carbonaterocks of the Donje Orešje quarry were formed by tectonic deformationin temporally separated deformational events. The main structureis the complex Orešje structure with a N–S strike and E vergence. It iscomposed of several overturned anticlines in which either similar ordifferent structural forms were observed. The structure was formed byLaramian movements during the Alpine orogeny when the main stresswas oriented E–W. During the youngest Tertiary and Quaternarymovements, the Orešje structure was influenced by a N–S orientedstress whch resulted in folding and rotation of the main structuralform.