Authors: Djerić, N., Jach, R., Goričan, Š., Reháková, D., Uchman, A., Gawlick, H-J., Schlögl, J. & Stojadinovic, U.

Abstract
Abstract: This study reconstructs the Jurassic–Early Cretaceous depositional evolution of the easternmost segment of the Alpine Atlantic based on three well-exposed successions of the Danubian Unit in the Serbian Carpathians. New biostratigraphic data derived from radiolarians, calpionellids, dinoflagellates, and ammonites, integrated with microfacies and carbon isotope analyses, document a transition from Early Jurassic syn-rift siliciclastic deposition to Middle–Late Jurassic hemipelagic sedimentation in a passive continental margin setting. The continental break-up and differential subsidence along the rifted margin resulted in a pronounced horst-and-graben segmentation. Condensed Rosso Ammonitico facies (Bajocian to lower Tithonian) on structural highs contrast with thick radiolarite-bearing basinal successions. Upper Jurassic carbonate gravity-flow deposits occur in both settings and up-section show a clear trend to more proximal facies that is related to Late Oxfordian to early Late Tithonian progradation of Štramberk-type carbonate platforms. During the Berriasian–Valanginian, Biancone-type hemipelagic limestones were distributed uniformly. Regional correlation with successions in Romania (Southern Carpathians), Tisza, the Western Carpathians, the Southern and Eastern Alps, and the Apennines demonstrates that the Danubian Unit represents a coherent segment of the southern passive margin of the Alpine Atlantic and contributes new constraints to ongoing debates on Mesozoic paleogeographic configurations in the Alpine–Carpathian realm. Keywords: Jurassic–Early Cretaceous, Biostratigraphy, Sedimentology, Geochemistry, Danubian Unit, Alpine Atlantic