Berriasian breccia and calcarenite overlying the Biancone limestone are dated and described as the Bohinj Formation. The microfacies analysis of the breccia clasts reveals that the main source area of the resedimented limestone was a penecontemporaneous carbonate platform (named the Bohinj Carbonate Platform) that developed on top of a nappe stack during the early emplacement of the internal Dinaric units onto the continental margin. The platform correlates regionally with genetically similar isolated carbonate platforms, e.g., with the Plassen Carbonate Platform in the Northern Calcareous Alps and the Kurbnesh Carbonate Platform in Albania.
COBISS.SI-ID: 34472493
Red nodular limestone overlying platform carbonates was dated to the Illyrian Trinodosus Ammonoid Zone with radiolarians and conodonts. Volcanics, carbonate megabreccias, resedimented limestones and marls, and finally platform limestone, follow upsection. Map-scale geometry of the basin-fill, lateral and vertical variations in facies types and thickness, and actually preserved paleo-escarpments provide evidence of synsedimentary block faulting and formation of small-scale, relatively shallow half-grabens. This research provides new important insights into Upper Anisian–Ladinian stratigraphy and the extensional event of the easternmost part of the Southern Alps and unravels the complex small-scale tilt-block topography genetically connected with the formation of other larger deep-water basins that resulted from the Middle Triassic rifting of the Neotethyan margin.
COBISS.SI-ID: 2081109
Three representative sections of the Tolmin Basin were dated with radiolarians. The maximum time interval of radiolarian cherts was determined to span from the late Bajocian to the early Tithonian and thus correlates well over the entire western Tethys. The Bajocian onset of chert deposition occurred concomitantly with the reorganization of plate boundaries, regional subsidence, and an increase in surface productivity. The intrabasinal distribution of radiolarian cherts demonstrates, that sedimentation rates were primarily determined by the redeposition of pelagic sediments, and that considerable stratigraphic gaps may occur even in distal basinal settings. The predominant control of local paleotopography on the accumulation rates of biosiliceous sediments can be generalized to all narrow, fault-bounded rift basins.
COBISS.SI-ID: 34472749
A Jurassic-Cretaceous section from the marginal part of the Tolmin Basin was studied and dated with radiolarians, calpionellids and benthic foraminifers. The correlation with the previously described sections of the Tolmin Basin shows that the Jurassic part of the section clearly exhibits a more marginal setting, whereas the Cretaceous part of the section correlates well with the central basinal succession. This inversion was related to the late Aptian tectonic event that was also responsible for the considerable submarine erosion and deposition of the basal breccia of the Lower flyschoid formation.
COBISS.SI-ID: 1125214
The Guevgueli Ophiolite Complex near Demir Kapija (Eastern Vardar Ophiolitic Unit) was studied for the age and facies of the overlying sediments. Cherts in direct contact with basalts are dated to late Bathonian–early Callovian with radiolarians. The post-obduction sequence, here informally named the Demir Kapija group, is composed of polymictic conglomerate, probably Kimmeridgian in age, and a more than 350 m thick carbonate succession. The carbonate succession consists of hemipelagic, slope and platform-margin facies, and contains algae and benthic foraminifers indicative of the Tithonian age. The Demir Kapija group is an exceptionally well preserved example of platform evolution on top of obducted ophiolites and may serve for better understanding of other genetically similar carbonate platforms (e.g. the Bohinj Carbonate Platform) that characterized the closing Meliata-Maliac-Vardar branch of the Neotethys.
COBISS.SI-ID: 37759021