The main results of this research programme are: 1. Detailed stratigraphy and sedimentology of Jurassic to Cretaceous pelagic successions from the Julian Nappe. Paleogeographically, the area comprised a deep-water basin (Mt. Mangart) and a pelagic plateau (Triglav Lakes). A close resemblance in sedimentary evolution between the studied area and other pelagic successions of the southern Tethyan continental margin was demonstrated. Basinal successions were dated with radiolarians. In addition, Toarcian radiolarian assemblages from Mt. Mangart were quantitatively analyzed. Relative abundances of taxa suggest that the specific composition of the Toarcian assemblages was primarily a result of oxygen deficiency during the early Toarcian global anoxic event. 2. Stratigraphic evolution of the Triassic arc-backarc system in northwestern Croatia (Žumberak, Ivanščica, Medvednica, Kalnik) with emphasis on radiolarian stratigraphy (cooperation with Institute of Geology, Zagreb, Croatia). 3. Sedimentary evolution of the Hawasina Basin (Oman). Radiolarian samples from 42 Middle Triassic to Upper Cretaceous sections were dated (cooperation with CNRS, France). 4. Draft of a catalogue including systematics of 312 Pliensbachian, Toarcian and Aalenian radiolarian species with world-wide distribution; preliminary radiolarian zonation for this time interval (international cooperation within Pliensbachian - Aalenian Working Group of INTERRAD). 5. Systematic description of known and new species of Late Triassic corals from the Northern Calcareous Alps (Austria) and Early Jurassic corals from western Slovenia. 6. Paleoenvironmental interpretation based on foraminiferal assemblages and microfacies of Cretaceous and Paleogene platform deposits in SW Slovenia and Croatia.