Conodont biostratigraphy and carbonate microfacies of the Late Devonian to Mississippian Milivojevića Kamenjar section ( Družetić , NW Serbia )

the Balkan Peninsula and little is known about the palaeogeographic relationships between this region and other areas (e.g. South Urals, Central Europe, Southern Europe, Iberian Peninsula, British Islands, North Africa) with well-established zonations based on conodonts (e.g. Sandberg et al. 1978; Corradini 2003, 2008; Kaiser et al. 2009; Corradini et al. 2016, etc.) and ammonoids (e.g. Korn 1996, Korn et al. 2007). The diverse fossil content of the limestone olistolith in the Milivojevića Kamenjar outcrop makes this the best key site for Carboniferous stratigraphy and palaeogeography in the Balkan Peninsula. The fossil site was discovered sixty years ago; the first description of rather diverse ammonoid assemblages from this locality was published by Stevanović & Kullmann (1962). In this monographic article, two fossil horizons were distinguished with a total of twelve ammonoid species. Already in this first description, controversial opinions on the geological setting were expressed (for a review, see Korn et al. 2010a). Ruzhencev & Bogoslovskaya (1971) did already comment on some mistakes in the original taxonomic determinations (of some ammonoid species and genera) and the stratigraphic conclusions drawn from the ammonoid assemblages. Therefore, it became evident that a revision of the stratigraphy (ammonoids and conodonts) and of the whole sedimentary succession is necessary. Following the studies on the ammonoids by Stevanović & Kullmann (1962), investigation of conodonts (Spasov & Filipović 1967, Scharfe 1977, Stojanović-Kuzenko & Pajić in Filipović 1995) and other faunal elements (Filipović 1995) suggested the potential of this section for stratigraphic correlation with other regions. We undertook a new investigation of the Milivojevića Kamenjar outcrop since 2008 by sampling the entire section in terms of ammonoids, conodonts and carbonate microfacies. In this process, we already published a series of papers dealing with the revision of the ammonoids, including a discussion of the stratigraphic age and the palaeogeographic position between Laurussia and Gondwana (Korn & Sudar 2010, 2016; Korn et al. 2010a, b, c, d, 2012).