Fig. 4

a Lithostratigraphic logs (Polšak et al., 1976; Sokač et al., 1974) showing the along-strike variations in the facies distributions along the Central Velebit cross-section. Highlighted are the upper sequence of the Middle Triassic (T₂²) and the Upper Jurassic (J₃²³), both show a pinch out towards the SW. b Shows two bore logs from the Velebit foreland. The Permuda-1 borehole shows that Cretaceous is thrusted on top a Paleogene succession and the presence of Lower Cretaceous anhydrite dolomite complex. The Olib-1 bore log shows a thrust within the Lower Cretaceous. c A simplified geological map showing the distribution of the Permian, Middle Triassic and Upper Jurassic successions. The Triassic and the Jurassic successions inferred to have been deposited in isolated fault-bounded basins, resulting in local depocenters, whereas the change in the Permian succession is related to a gradual change in the depositional environment, from up to 1200 m thick Permian clastic to carbonatic succession exclusively exposed in Velebit (Ivanović et al., 1973; Sokač et al., 1974) to the Upper Permian evaporites exclusively found along the Split-Karlovac Fault (Grimani et al., 1972; Tišljar et al., 1998). An up to 700 m thick Middle Triassic sequence, consisting of limestones and volcanoclastic rocks (Pamić, 1984; Sokač et al., 1974), is exposed along strike of the Lika Backthrust (LBT), but pinches out to the northwest (c), becoming confined to the hanging wall of the two northern backthrusts of Velebit Fault System (Fig. 3a). Middle Triassic is also exposed around the Bruvno dome and in the hanging wall of the SW-vergent northern forethrusts. The up to 800 m thick Upper Jurassic carbonate sequence is exclusively exposed in the northeastern part of the study area. Most of the exposures are located around the Split-Karlovac Fault and Plitvice Fault System; a minority is exposed northeast of the Bruvno dome. LFS Lika Fault System, PFS Plitvice Fault System, LBT Lika Backthrust, SKF Split-Karlovac Fault