The occurrence of microfossil assemblage represented by calpionellids in close association with benthic foraminifera and encrustingCrescentiella morronensisis reported for the first time from the Upper Tithonian of NE Serbia. The biostratigraphic and sedimentological investigations were carried out on a 250 m thick carbonate succession in Jelenska Stena quarry cropping out along the Danube River Gorge in the border area of Serbian Carpatho–Balkanides and Romanian Southern Carphatians. On the basis of determined benthic foraminiferal taxaTextulariasp. cf.T. bettenstaedtiandEverticyclammina praekelleriin the lower part of the succession and calpionellid association dominated by the representatives of calpionellid generaTintinnopsella, CrassicollariaandCalpionellathe carbonate succession is assigned to the Upper Tithonian. The scarcity of calpionellid zonal species prevents the nominal zones being recognized. Petrographic analysis of thin-sections led to the recognition of three basin microfacies types: bioclastic wackestone, bioclastic peloidal wackestone/packstone and mudstone. These microfacies characterize the SMF 3 and SMF 4 which indicate deposition in slope and toe-of-slope environments. This study extends the palaeogeographical distribution of Upper Tithonian calpionellids along the northern Tethyan margins. The investigated carbonate succession is compared with coeval strata from other northern Tethyan regions.

This paper presents an analysis of the quality of groundwater that are exploited in the territory of the Mesic village in the factory "Moja voda" on the slopes of the Vrsac Mountains. Spring waters formed in the Tertiary and Quaternary sediments are situated near the high-grade metamorphic complex border of Vrsac Mountains that represents the northernmost prolongation of Serbo-macedonian massif to the West and low-grade metamorphic complex of the Ranovac-Vlasina-Osogovo terrane to the East. Groundwater is assigned on the basis of chemical analyses to the group of hydrocarbonate-calcium-magnesium non-carbonated low-mineral water, whose physical properties and chemical composition is the consequence of geological conditions of the environment through which circulates. The dominant anions and cations (HCO3 -, Ca2 + and Mg2 +) accumulate in groundwater of Mesic as a product of weathering of silicate minerals present in igneous and metamorphic complex of Vrsac Mountains. The specificity of these waters is an adequate amount of selenium in its composition related to the Tertiary and Quaternary clay deposits which have the pyrite and organic matter, as well as silica, whose presence in the water is a consequence of weathering (hydrolysis) of silicate minerals, particularly feldspar. Water from the exploration wells is classified as ?B reserve? according to the applicable criteria. [Projekat Ministarstva nauke Republike Srbije, br. 176017]

Stratigraphic/palaeontological geosites of Stara Planina Mountain in east Serbia are well developed in the area of Serbian/Bulgarian state border, where with this occassion, three sections of exeptional geological and scientific interest are selected: Jelovica, Rosomač and Senokos. These geosites represent the important localities for study of Triassic and Jurassic terrigene-carbonate deposits, for which the scientific value from the domains of palaeontology, stratigraphy and sedimentology is widely known. The aim of this work is to represent the main scientific arguments for inventory and protection of detached transborder geological sites that are unique according to their composition and content.[Projekat Ministarstva nauke Republike Srbije, br. 176008