Field excursion guide to the geology of Fruska Gora (Southern Pannonian Basin, Serbia)

Fruska Gora, a prominent inselberg within the southern margin of the Pannonian Basin, preserves a complex geological record of both orogenic and post-orogenic processes in the central Balkans. This one-day field excursion highlights key outcrops of the Vardar Zone ophiolitic belt, including Serbia’s only documented blueschist-facies rocks, as well as serpentinites, diabases, and pillow lavas, which collectively record subduction-related metamorphism and the emplacement of oceanic lithosphere during the closure of the Neotethys ocean. Additional stops include Upper Cretaceous flysch successions intruded by Oligocene latites (≈35 Ma), whose tectonic evolution has been constrained by paleomagnetic studies documenting post-collisional rotations and extensional tectonics. Together, these localities provide valuable insights into the interplay of subduction, magmatism, and basin evolution, establishing Fruska Gora as a key site for understanding the geodynamic history of the southern Pannonian Basin.