GEOLOŠKI ANALI BALKANSKOGA POLUOSTRVA Volume 80 (1), July 2019, 1–15 – DOI: 10.2298/GABP1901001J

The First evidence of marine Badenian transgression near Koceljeva (Central Paratethys, western )

GORDANA JOVANOVIĆ1, STJEPAN ĆORIĆ2 & SEJFUDIN VRABAC3

Abstract. This paper presents the irst detailed biostratigraphic investigation of deposits cropping out in stream Sumijevac near Koceljeva (western Serbia). The most important fossil communities and their signiicance are presented. New biostratigraphic results have been achieved by the study of calcareous nannoplankton, foraminifera and mollusks fauna which clearly indicate the Key words: presence of the lower Badenian zone (Lagenid Zone), and deines preciously Central Paratethys, calcareous time of the marine transgression in this area. Further, the revised age of the nannoplankton, foraminifers, sedimentary deposits presented here provides the necessary background mollusks, Koceljeva, lower information for future research of the Badenian sediments of Serbia and Badenian. neighbouring regions.

Апстракт. Овај рад представља резултате првих детаљних биостра- тиграфских истраживања седимената из профила откривеног у потоку Сумијевац код Коцељеве (западна Србија). Приказане су најважније заједнице фосила и њихов значај. Нови биостратиграфски резултати добијени проучавањем кречњачког нанопланктона, фораминифера и Кључне речи: фауне мекушаца јасно указују на присуство доњобаденске зоне (ла- Централни Паратетис, генидна зона), и прецизно дефинишу време морске трансгресије у овој кречњачки нанопланктон, области. Поред тога, ревидирана старост седимената пружа основне фораминифери, мекушци, потребне информације за будућа истраживања баденских седимената Коцељева, доњи баден. Србије и суседних региона.

1 Natural History Museum, Njegoševa 51, 11 000 , Serbia. E-mail: gordana.j@nhmbeo. 2 Geological Survey of Austria, Neulinggasse 38, A-1030 Vienna, Austria. E-mail: [email protected] 3 University of Tuzla, Faculty of Mining, Geology and Civil Engineering, Department of Geology, Univerzitetska 2, 75000 Tuzla, Bosnia and Herzegovina. E-mail: [email protected]

1 GORDANA JOVANOVIĆ, STJEPAN ĆORIĆ & SEJFUDIN VRABAC

.Introduction bia during the early-middle Miocene. Similar lower Badenian deposits recently were described in Bosnia During the middle Miocene (Badenian) the wider (ĆORIĆ et al., 2018). Well-documented Badenian area of Koceljeva (western Serbia), were situated to lithostratigraphic units are recognized in several the southern margin of the Pannonian Basin System. basins such as: Podrinje, Kolubara, Belgrade and Ve- The fossiliferous deposits at Koceljeva vicinity devel- lika Morava (ANĐELKOVIĆ et al., 1989). In the vicinity oped during middle Miocene transgression in the of Koceljeva (Kolubara basin), fossiliferous beds are northern slopes of Bukulja Mountain. Locality is situ- exposed in the valley of Sumijevac Stream. Palaeo- ated about 1 km southwest of Koceljeva (Fig. 1b). The geographicaly, this site is located at the extreme wider area of Koceljeva and its fossils fauna were the southern margin of the Pannonian Basin, and be- subject of investigation by STEVANOVIC ́ (1959), STEVA- longs to the Koceljeva Graben that occupies the ex- NOVIĆ & MILOŠEVIĆ (1959), EREMIJA, (1977), DOLIĆ & treme southwestern part of the Kolubara– KRSTIĆ (1985), followed by publishing a lists of fossils. Basin, constricted between the horsts of Vlašić–Bli- More than 100 species of mollusks have been identiied . zonj in the south and in the north (after The stratigraphical position of the Sumijevac (Sum- MAROVIĆ et al., 2007). Sedimentary rocks in the outcrop njivac) stream deposits was based primarily on the are represented by polimicrite conglomerates and foraminifera (GAGIĆ, 1968; PETROVIĆ, 1985), while all sandstones. Badenian deposits of the wider area of previous investigations yielded different stratigra- Sumijevac Stream are rich in fossil records (STEVANOVIĆ , phic attributions (STEVANOVIĆ, 1959; GAGIĆ, 1968; ERE - 1959). However, the palaeontological investigations MIJA, 1977; PETROVIĆ, 1985; EREMIJA & PAVLOVIĆ, 1990; have not taken place in the area regularly over the last JOVANOVIĆ, 2018). In order to resolve the dificulties decades, because sediments are only exposed on the involved with age determination of the fossiliferous banks of the stream and can be seen only at a low beds exposed at the locality Sumijevac, here we pres- water level. GAGIĆ (1968) and PETROVIĆ (1985) investi- ent the results of investigations of foraminifera, cal- gated foraminifers from this locality and attributed careous nannofossil and mollusks assemblages these deposits to the late Badenian. They were gener- performed on three samples taken from this locality. ally related to the synrift phase of the Pannonian Basin The well exposed section consists of ive layers, (MAROVIĆ et al., 2007). This locality is situated at the whereas lowermost and uppermost parts of the de- Basic Geological Map 1:100,000, sheet L scribed outcrop have not been investigated due to 34-124 (FILIPOVIĆ et al., 1973). Koceljeva graben was the lack of fossils. Sediments cropping out in the illed with deposits from the lower Miocene to the Sumijevac section contain a large number of fossils, upper Miocene. We investigated about 2.8 m thick especially mollusks. Preservation is fairly good all transgressive middle Miocene (Badenian) deposits through the section. (Fig. 1d) which unconformably overlies the lower The aim of this paper is to present results of in- Miocene freshwater sediments (STEVANOVIĆ 1977). vestigations carried out in the Badenian deposits ex- posed at the locality Sumijevac. Material and methods

Geological setting Middle Miocene (Badenian) deposits of the Koce- ljeva contain diverse fauna and often have excep- During the middle Miocene, the Paratethys lood- tional fossil preservation. Also, fossil material of the ed different types of basement in Serbia and a nor- Sumijevac Stream is very well preserved and only mal marine regime developed in the area (ANĐELKOVIĆ several specimens show signs of reworking. Re- et al., 1989), as a result of the increase in global sea search methods have included ield work and labo- level (KOVAČ et al., 2007). The locality Sumijevac pro- ratory investigation in the Natural History Museum vides valuable geological and paleontological data of of Belgrade (Serbia), Geological Survey of Austria Koceljeva area palaeoenvironments in western Ser- and University of Tuzla, Faculty of Mining, Geology

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Fig. 1. a. Geographical position of Sumijevac locality in Europe; b. Location of the studied area in Serbia; c. Langhian palaeogeography (after RÖGL, 1998) showing the location of the studied succession (yellow star); d. Photo of studied section with indication of the sampled beds: 1 (conglomerates); 2, 3 (sandstones); e. Photo of basal conglomerates.

and Civil Engineering (Bosnia and Herzegovina). We recognized ive layers, but lowermost and up- Field work and sampling at this locality was con- permost parts of the described outcrop have not been ducted during 2017. The procedures adopted for the investigated. For this research, the authors have chosen fossil extraction are in accordance with standard only beds rich in fossil remains. All collected material palaeontological sample preparation technique. For is stored in the collections of Natural History Museum the microfossil extraction, three samples were pre- in Belgrade (Serbia). The part of studied specimens of pared and washed at the laboratory and allowed to foraminifera are housed in the University of Tuzla, dry. Laboratory methods were employed for disinte- (Bosnia and Herzegovina), while the samples of nan- grating soft sandstone using hydrogen peroxide. noplankton assemblages are stored in the collection of After that water is added and allowed to stand for the Geological Survey of Austria in Vienna. few hours. Samples were washed over a 0.1 mm- sieve and picked under the microscope. The speci- mens were identiied with age attribution. Biostratigraphy Small amounts of sediments were taken for the calcareous nannofossils investigation. Smear slides Biostratigraphic analysis is based on the part of were prepared following the standard procedure de- this section with three lithological units recognized scribed by PERCH-NIELSEN (1985). The stratigraphical and described from the bottom to the top in Figs. 1 analysis of the nannoplankton zonation is followed and 2. The studied part of the outcrop starts with a by MARTINI (1971), while the foraminifera zonation is ine-grained, weakly cemented polymictic conglomer- based by GRILL (1943). ate (sample 1). Angular and slightly rounded quartz

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grains which are sometimes transparent and glossy the mollusks juvenile forms, Corbula gibba (OLIVI, dominate. The grains of quartz, limestone and others 1792) is quite common. Poorly preserved specimens rocks are slightly rounded, up to 1 cm in size. Grains and fragments of Azorinus cf. chamasolen (da COSTA, of mica are very rarely represented. Besides calcare- 1778), Venus nux GMELLIN 1791, Turritella badensis ous nannoplankton and foraminifera the conglomer- SACCO, 1895, Calyptraea chinensis LINNAEUS, 1758, ate contains abundant good preserved shells of Polinices sp., Conus sp. are also recognized. juvenile mollusks, fragments of some adult mollusks, The conglomerate is overlain by a layer of grey, disarticulate shells of adult bivalves, echinoid spines, poorly cemented sandstone (sample two) with simi- ostracods and otolites. This unit is about 0.5 m thick. lar association of nannofossils and foraminifera and Calcareous nannoplankton is rare, but well pre- much more diverse and better preserved mollusks served and contains Sphenolithus heteromorphus specimens. Angular and weakly rounded quartz and DEFLANDRE, 1953. Nannoplankton assemblage is calcite grains, as well as fragments of mica are de- characterised by the domination of Reticulofenestra tected under the microscope. In common with con- minuta ROTH, 1970, Coccolithus pelagicus (WALLICH, glomerate layer, the nannoplankton association is the 1877); SCHILLER, 1930, Braarudosphaera bigelowii same. The benthic foraminifera are dominant, (GRAN & BRAARUD, 1935) DEFLANDRE, 1947, Coronocy clus whereas planktic forms are represented by the genus nitescens (KAMPTNER, 1963) BRAMLETTE & WILCOXON, Globorotalia. The following species were determined: 1967, Helicosphaera carteri (WALLICH, 1877), KAMPTNER, Ammonia viennensis (d’ORBIGNY, 1846), Nonion com­ 1954, Helicosphaera mediterranea MÜLLER, 1981, mune (d’ORBIGNY, 1846), Lenticulina clypeiformis (d’OR- Rhabdosphaera sicca (STRADNER, 1963) FUCHS & STRAD- BIGNY, 1846), Elphidium crispum (LINNAEUS, 1758), ER, 1977, Sphenolithus heteromorphus DEFLANDRE , 1953, Quinqueloculina buchiana d’ORBIGNY, 1846, Asterigeri­ Sphenolithus moriformis (BRONNIMANN & STRADNER , nata planorbis (d’ORBIGNY, 1846), Borelis melo melo 1960) BRAMLETTE & WILCOXON, 1967, Thora cosphaera (FICHTEL & MOLL, 1798), Bolivina antiqua d’ORBIGNY, saxea STRADNER, 1961. Also, rare reworked Upper 1846, Porosononion granosum (d’ORBIGNY, 1846,), Cretaceous species Eiffellithus gorkae REINHARDT , 1965, Globorotalia sp. These deposits contain mollusk-dom- Micula staurophora (GARDET, 1955) STRADNER, 1963 and inated accumulations with numerous specimens of Watznaueria barnesiae (BLACK & BARNES, 1959) PERCH- different oriented bivalves and gastropods. The mol- NIELSEN, 1968 were observed. luscan association is diverse and represented by juve- Foraminifers are very rare and represented almost nile and adult forms: Tellina planata (LINNAEUS, 1758), exclusively by benthic forms. Only single specimen of Seila trilineata (PHILLIPI, 1836), Corbula gibba (OLIVI, Trilobatus presents planktic form. Assemblage is 1792), Nucula placentina, LAMARCK, 1819, Cardites dominated by Ammonia, Asteri gerinata , Elphidium and partschi (MÜNSTER IN GOLDFUSS, 1840), Venus nux GMEL - Miliolidae. Ammonia viennensis (d’ORBIGNY, 1846), LIN, 1791, Teinostoma woodi, (HORNES, 1855), Caecum Nonion commune (d’ ORBIGNY, 1846), Asterigerinata trachea (MONTAGU, 1803), Turritella badensis SACCO, planorbis (d’ORBIGNY, 1846), Trilobatus trilobus (REUSS, 1895, Turritella tricincta BORSON, 1821, Turritella sp., 1859), Borelis melo melo (FICHTEL & MOLL, 1798), Granulifera hoernesi (DODERLEIN, 1862), Polinices sp., Porosononion granosum (d’ORBIGNY, 1846), Dendritina and pteropod Vaginella austriaca KITTL, 1886. The sec- haueri d’ORBIGNY 1846, Lenticulina inornata (d’ORBIGNY, ond lithological unit attains a thickness of about 1 m. 1846), Cibicidoides ungerianus ungerianus (d’ORBIGNY, The third layer at the top of the succession is 1846), Spirolina austriaca d’ORBIGNY, 1846, Ano­ composed of grey, whitish to yellowish, very ine- malinoides badenensis (d’ORBIGNY , 1846), Elphidium grained, poorly cemented sandstone. Microscopi- crispum (LINNEUS, 1758), Elphidium rugosum (d’OR - cally, the pronounced dominance of quartz grains, BIGNY, 1846), Bolivina sp., Triloculina sp. and with signiicantly subordinate participation of calcite Quinqueloculina sp. were determined. grains and fragments of mica minerals is observed. The polimictic conglomerate is rich in fossils and These sediments are richer in the calcareous nan- contains a good preserved shells of juvenil mollusks noplankton content then previous ones and contain and fragmented shells of adult individuals. Among also S. heteromorphus. The list of identiied species

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is identical to those from the lower bed, while carius stercusmuscarum (GMELLIN, 1791) etc. The Reticulofenestra minuta dominates by more than third unit is about 1.30 m thick. 90% in the total assemblage. The foraminifera fauna The identiication of the nannoplankton zone NN5 is relatively rare and represented only by benthic (MARTINI, 1971), (Fig. 3), was made based on the forms: Ammonia viennensis (d’ORBIGNY, 1846), Nonion presence of Sphenolithus heteromorphus and the ab- commune (d’ORBIGNY), Asterigerinata planorbis (d’OR - sence of Helicosphaera ampliaperta in all investigated BIGNY, 1846), Textularia sp., Textularia gramen gramen samples. The last occurrence of H. ampliaperta deines d’ORBIGNY, 1846, Bolivina sp., Bolivina antiqua the NN4/NN5 boundary. Planktic foraminifera are d’ORBIGNY, 1846, Heterolepa dutemplei (d’ORBIGNY, very rare in the Sumijevac deposits, making cor- 1846), Reussela spinulosa (REUSS, 1850), Elphidium sp. relation with the planktic zonation dificult. Therefore, and Pseudotriloculina consobrina (d’ORBIGNY). New biostratigraphic zonation is mainly based on the forms of mollusks with large shells such as Atrina benthic foraminifera which have relatively high pectinata (LINNAEUS, 1767) (in situ) and Procardium diversity in the study section. The associations of danubianum MAYER, 1866 appear here, associated by: foraminifers from the analysed samples also indicate Semicassis laevigata DEFRANCE, 1817, .Azorinus cha­ that the sedimentary deposits of Sumijevac belong to masolen (da Costa, 1778), Cubitostrea digitalina the Ammonia viennensis and Nonion commune zone of EICHWALD, 1830, Cardites partschi MÜNSTER IN GOLDFUSS, the early Badenian. The zone is dated as middle 1840, Turritella badensis Sacco, 1895, Turritella sp., Miocene based on the presence of benthic forms, and Strioterebrum (Strioterebrum) bistriatum (GRATELOUP, corresponds to the M5 zone of BERGGREN et al. (1995), 1833), Strioterebrum basteroti (NYST, 1843), Tellina on the regional scale (Paratethys). Also, the chara - planata (LINNAEUS, 1758), Terebra neglecta (MICHE- cteristic species Lenticulina clypeiformis found only in LOTTI, 1847), Phasmoconus fuscocingulatus, (HORNES, the lower Badenian of Central Paratethys (CICHA et al., 1851), Kalloconus berghausi MICHELOTTI, 1847, Nati­ 1998) was discovered in the sample No. 2 (bed 2). In addition, Ammonia with quite large shell is a characteristic form of lower Badenian (PAPP & SCHMID, 1985; VRABAC, 1989). The presence of the holo- plankton species Vaginella austriaca indicates the lower Badenian age of these sedi- ments. This pteropod is rare or absent in the deposits of western and central Serbia (STEVANOVIĆ, 1970). PEZELJ et al. (2013) reported the oc- currence of V. austriaca in the lower Badenian sediments (Upper Lagenidae zone) of Ugljevik (Bosnia and Her- zegovina).

Discussion and Interpretation

Fig. 2. Lithological column of the Lower Badenian deposits at Sumijevac section with the In this paper, the Badenian fossil content (according JOVANOVIĆ et al., 2018). marine sediments from the

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adjacent area of Koceljeva were studied from a viennensis) corresponds to the Rotalid Zone, also biostratigraphy perspective. The lowermost and known as Impoverishment Zone (PAPP & SCHMID, uppermost parts of the described outcrop have not 1985). On the southern boundary of the Central been investigated due to the lack of fossils. Transition Paratethys, in addition to other foraminiferal zones of the lowermost part of the succession towards the of Badenian, the local Zone Ammonia viennensis and irst fossiliferous bed was not recorded. The series of Nonion commune (VRABAC et al., 2006, 2007), as well coarse conglomerates a few meters thick are located as the upper Zone Ammonia viennensis are separated along the Sumijevac stream, not far from described (VRABAC, 1989). There are two essential differences section. It is possible that conglomerates from the between these zones. The irst difference is a pa- layer 1 (Fig. 2 e) corresponds to Middle Miocene laeogeographic-superposition character. The lower (Badenian). The basal conglomerate contains large Badenian Ammonia viennensis Zone and Nonion rounded clasts with size range from less than 3 mm commune Zone were deposited during the trans- to over 40 cm. The space between them is illed with gression of Central Paratethys and transgressively smaller particles of other sedimentary materials. overlain the rocks of different composition and age (EREMIJA, 1987; 1987a; VRA - BAC, 1999). In Bosnia, these are followed by the lower Badenian Trilobatus trilobus Zone and Orbulina suturalis Zone (VRABAC, 1999). The upper Badenian Am­ monia viennensis Zone is deposited during the regres- sion of the Central Paratethys (SENEŠ, 1974; SOKLIĆ, 1988; VRABAC et al., 2015), and con- formably overlies the upper Badenian Bolivina dilatata maxima Zone. Another very important difference is a pa- laeontological character. By the end of the Badenian there was a decrease in salinity, which is why the organic world in the uppermost zone of upper Badenian is consi- derably poorer than in the Fig. 3. Stratigraphic distribution of the calcareous nannofossils, foraminifera and mollusks lower Badenian zone (VRABAC, in the Sumijevac section near Koceljeva. Stratigraphic correlation table and global 1999) when the salinity of the chronostratigraphy after HILGEN et al. (2009), NN zone after LOURENS et al. (2004); PILLER et sea water was normal. Due to al. (2007), HOHENEGGER et al. (2009), PEZELJ et al. (2013), SANT et al. (2017). the decrease of salinity, shells of Ammonia are signiicantly smaller in the uppermost part Based on foraminifera GAGIĆ (1968) and PETROVIĆ of upper Badenian and lower Sarmatian. The fo- (1985) attributed these deposits to the Upper Ba- raminiferal tests reduce by different stress that can be denian Rotalia beccarii Zone (= Ammonia viennensis). induced by luxes in salinity, CO2, O2, pH, etc. The tests In Vienna Basin, Rotalia beccarii Zone (= Ammonia of Ammonia from Sumijevac Stream are quite large

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which characterized lower Badenian forms. All of the ronment with rich nutrients input. The majority of above mentioned characteristics are recorded at the mollusks species in this article like many of the several proiles in the northern Bosnia. In this area species recorded from the prior papers (EREMIJA, (Tuzla basin, Ugljevik region, etc.), the lowermost part 1977; STEVANOVIĆ, 1959; DOLIĆ & KRSTIĆ, 1985) belong of lower Badenian is also presented by the Ammonia to the genera living in subtropical and tropical seas. viennensis Zone and Nonion commune Zone cor- Among mollusks especially the juvenile forms of responding to the nannoplankton Zone NN5, according the opportunistic species Corbula gibba were to VRABAC et al. (2006, 2011, 2013, 2017) and ĆORIĆ et observed. This is a species with high fertility and an al. (2007). This zone is synchronous with the Lagenide enormous number of eggs and can be settled in rather Zone of Vienna Basin (GRILL, 1943; PEZELJ et al., 2013). unstable soft sea bottom. Corbula inhabits soft bottom A characteristic feature is the presence of Corbula sediments mixed with molluscan shell fragments gibba and Turritella badensis showing a marked (HRS-BENKO, 2006). This bivalve with a sedentary mode frequency in the deposits. Among mollusks espe- of life is very frequent in the Middle Miocene cially the juvenile forms of the opportunistic species sediments of Serbia and other localities of Central Corbula gibba were observed. The study of mollusks Paratethys. The discovery of carbonated woods in the fauna indicates an inluence of the Middle Miocene lower part of the succession (bed 2) also indicates an Climatic Optimum that preceded the Middle Miocene input from the terrestrial environment near coastal Climatic Transition (approximately 14 Ma ago) environment of the littoral zone. Atrina pectinata (pen (HAMON et al., 2013), and overlaps in time with the shell) lives embedded in the sediment. The fragile end of Miocene Climatic Optimum. The Middle shell of this bivalve is easily damaged by physical Miocene Climate Optimum (MMCO) occurred be- disturbance. However, unlike Corbula gibba, juvenile tween 17–14.50 Ma according to ZACHOS et al., Atrina pectinata in sediments are usualy smothered (2008). This diverse fossil material is typical for the and the recoverability is likely to be low. Atrina Langhian of Central Paratethys (HARZHAUSER et al., pectinata from Sumijevac section with well-preserved 2003). Several thermophilous elements (especially prismatic layers composed of columnar crystals Semicassis, Procardium, Kalloconus, etc.) which were indicates the inluence of weak and moderate recorded in the Central Paratethys during early currents. The most important palaeoecological change Badenian, are identiied. Several samples of Cubi­ is observed in the increase in size and biodiversity of tostrea, Conus, Persistostrombus and corals collected mollusks fauna, especially in sample No. 3. Turritella by Nikola Panić are housed in the Native museum in assemblages are common with large specimens of Koceljeva providing additional information on the Turritella badensis. A high percentage of Turritella assemblages of lower Badenian mollusca. Relatively representation can also be an indication of a coastal high molluscan diversity observed in some other marine environment with a rich nutrients input. localities in Serbia (EREMIJA, 1987) and Bosnia The locality Sumijevac Stream provides valuable (ATANACKOVIĆ, 1969; 1985) is a marker of tropical evidence of the Koceljeva palaeoenvironments during conditions in the Paratethys Sea during middle the early Middle Miocene. The marine invertebrate Miocene times. These results highlight how im- fauna of Sumijevac Stream is among the richest portant is the study of many different sites situated recorded from the Badenian sediments of Serbia. The on the southern margin of the Central Paratethys in revised age of the sedimentary deposit presented here order to gain a full understanding of warm climate provides the necessary background information for inluence in the distribution of mollusks fauna. future research of neighbouring regions. The lithofacial and biofacial characteristics of the studied deposits of the Sumijevac proile indicate that they were deposited in a very shallow, coastal Conclusion part of the infralittoral in the sea with normal salin- ity. The dominance of Reticulofenestra minuta and This paper presents the irst detailed biostrati- Coccolithus pelagicus indicates shallow, marine envi- graphic investigation of the sedimentary succession

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in the Sumijevac Stream, near Koceljeva. The results is necessary to carry out the revision of the upper of new material collected in the 2017 are presented Badenian, determined only based on the Rotalia bec­ and the biostratigraphical implications are inter- carii Zone (= Ammonia viennensis) in neighbouring preted in more details. The deposits at this locality regions in Serbia (Koceljeva, Rakovica stream near are abundant in fossils. However, previous investiga- Belgrade, SW Banat, Sopot, , Aranđe- tions had yielded different stratigraphic attributions. lovac, Kolubara basin, etc.), as well as in Bosnia and The sediments are rich in mollusks, calcareous nan- Herzegovina (Prnjavor basin, NE Kozara area, etc.), nofossils, benthic foraminifera, whereas sporadically and Croatia (Borovnjak, etc.). occurr ostracods, otoliths and remains of echinids. Prior to these investigations the age of the Sumijevac deposits remained poorly constrained. Acknowledgements The study of Sumijevac succession includes bios- tratigraphic analysis based on calcareous nanno- The authors are grateful to Dr Ljupko Rundić (Univer- plankton, benthic foraminifera and pteropods. sity of Belgrade, Faculty of Minning and Geology) and Dr Biostratigraphically, it corresponds to the lower Marijan Kovačić (Department of Geology, Faculty of Sci- Badenian (Lagenidae Zone). Some species are very ence, University of Zagreb). Also, the authors would like useful biostratigraphic markers, such as nanofosil to thank to the curator Zoran Živanović from the Native Sphaenolithus heteromorphus and benthic forami- museum in Koceljeva for providing support during the nifera (Lenticulina clypeiformis, Ammonia viennnsis ield research. This study was realized through the coop- and Nonion commune). The identiication of the eration between Natural History Museum (Belgrade), Uni- nannoplankton zone NN5 (MARTINI, 1971), was made versity of Tuzla and Geological Survey of Austria (Vienna). on the basis of the presence of Sphenolithus heterop­ morphus DEFLANDRE and absence of Helicosphaera ampliaperta BRAMLETTE & WILCOXON. The last oc- References curence of H. ampliaperta deines the NN4/NN5 boundary. Furthermore, benthic foraminifera (Lenti­ ANĐELKOVIĆ, M., PAVLOVIĆ, M., EREMIJA, M. & ANĐELKOVIĆ, J. 1989. culina clypeiformis, Ammonia viennnensis and Nonion Paleogeograija. In: ANĐELKOVIĆ, M., (Ed.). Geologija šire commune assemblage) correspond to this biostrati- okoline Beograda, [Geology of the wider area of Belgrade graphic level. Also, the presence of holoplankton - in Serbian], IV, University of Belgrade, 282 pp. species Vaginella austriaca indicates the lower ATANACKOVIĆ, M. 1969. Paleontološka i biostratigrafska Badenian age of these sediments. This pelagic gas- analiza tortonske faune severoistočnog Potkozarja tropod was not recorded from the deposits of upper (okolina sela Turjaka i Miljevica) [Paleontological and Badenian in Central Paratethys (BOŠNJAK et al., 2017). biostratigraphical analysis of the Tortonian fauna of This is the earliest transgressive event documented northeastern Potkozarje (surrounding the villages of in the vicinity of Koceljeva. Turjak and Miljevića – in Serbian]. Acta Geologica In addition, some species or mollusks assem- Zagreb, (6): 149–222. blages have been used as indicators of the paleocli- ATANACKOVIĆ, M.A. 1985. Mekušci morskog miocena Bosne mate in coastal environments. The Sumijevac [Miocene marine mollusks of Bosnia – in Serbo-Cro- sediments were deposited in a very shallow, coastal atian), Geoinženjering, 1: 1–305. part of the infralittoral with normal sea salinity. The BERGGREN, W.A., KENT, D.V., SWISHER, III, C.C., & AUBRY, M.-P. dominance of Reticulofenestra minuta and Coccoli­ 1995. A revised Cenozoic geochronology and chrono- thus pelagicus as well as some mollusks and benthic stratigraphy. In: BERGGREN, W.A., KENT, D.V., AUBRY, M.-P. foraminifera indicates a shallow, marine environ- & HARDENBOL, J. (Eds.). Geochronology, Timescales and ment with rich nutrients input. The revised age of the Global Stratigraphic Correlation. SEPM Special Publi- sedimentary deposit presented here provides the cation 54: 129–212. necessary background information for the future re- BOŠNJAK, M., SREMAC, J., VRSALJKO, D., AŠČIĆ, Š. & BOSAK, L. 2017. search of neighbouring regions. We conclude that it Miocene “Pteropod event” in the SW part of the Central

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commune u miocenskim sedimentima Tuzlanskog ната одређени су фораминифери и мекушци, и bazena [The stratigraphic position of the local први пут до сада је урађена анализа седимената foraminifer zone A. viennensis and N. commune in the на кречњачки нанопланктон. На основу ових Miocene sediments of the Tuzla basin – in Bosnian]. резултата је дефинисана биостратиграфска при- Zbornik radova RGGF, 31: 23 – 27. падност проучаваних седимената. VRABAC, S., ĐULOVIĆ, I. & TOMIĆ, R. 2011. Paleogen i neogen У раду су приказани резултати добијени на na proilu Vučjak u ugljonosnom bazenu Ugljevik основу детаљне биостратиграфске анализе [Paleogene and neogen on the pro!ile of Vučjak in the фосилних асоцијација кречњачког нанопланк- Ugljevik coal basin – in Bosnian]. Zbornik radova IV тона, бентоских фораминифера и птеропода. savjetovanja geologa BiH sa međunarodnim učešćem, Истраживања су по слојевима обухватила нано- 3–12. фосиле, микро и макро фауну, на основу којих је VRABAC, S., ĆORIĆ, S., ĐULOVIĆ, I. & JEČMENICA, Z. 2013. Biostra- доказана доњобаденска старост седимената и tigrafske zone donjeg badena u proilu bušotine Ui – њихова зонска припадност. Неке врсте предста- 568/3 kod Ugljevika [Biostratigraphic zones of the вљају врло корисне биостратиграфске маркере, Lower Badenian in the well pro!ile Ui – 568/3 near као што су нанофосил Sphaenolithus heteromor­ Ugljevik – in Bosnian]. Zbornik radova V savjetovanja phus, бентоски фораминифери (Lenticulina clype­ geologa BiH sa međunarodnim učešćem, 136–145. iformis), затим Ammonia viennnsis и Nonion VRABAC, S., ĆORIĆ, S., ĐULOVIĆ, I., & JEČMENICA, Z. 2015. commune). Идентификација нанопланктонске Diskordancija između badena i sarmata u proile зоне NN5 (MARTINI, 1971) је извршена на основу Spasine kod Ugljevika [Discordance between the присуства Sphenolithus heteromorphus и одсуства Badenian and the Sarmatian in the pro!ile Spasine near Helicosphaera ampliaperta, чије изумирање дефи- Ugljevik – in Bosnian]. Zbornik radova I Кongresa нише NN4/NN5 границу. Присуство птеропода geologa BiH sa međunarodnim učešćem, 10 –15. Vaginella austriaca потврђује доњобаденску ста- VRABAC, S., ĐULOVIĆ, I., BABAJIĆ, E., USTALIĆ, S., MUJANOVIĆ, A. & рост ових седимената. На основу целокупног KAMERIĆ, M. 2017. Freshwater and marine Miocene on проученог фосилног материјала може се закљу- the Čaklovići cross section in Tuzla basin. 13th Work­ чити да је ово најранији трансгресивни догађај shop on Alpine Geological Studies, Abstract volume, 107. документован у околини Коцељеве. ZACHOS, J. C., DICKENS, G. R., & ZEEBE, R. E. 2008. An early Седименти Сумијевца су таложени у врло Cenozoic perspective on greenhouse warming and плитком приобалском делу инфралиторала, при carbon-cycle dynamics, Nature, 451: 279–283. нормалном салинитету. Проучавана фауна меку- шаца указује на утицај средњомиоценског кли- матског оптимума (MMCO 17-14.50 Ma, према Резиме ZACHOS et al., 2008), који је претходио средњо- миоценској климатској транзицији. Неке топло- Први докази морске доњобаденске водне форме мекушаца као што су Semicassis, трансгресије код Kоцељеве (западна Procardium, Kalloconus и др. констатоване су и у Србија) другим ранобаденским локалитетима Централ- ног Паратетиса. Доминација Reticulofenestra mi­ Поток Сумијевац се налази на око 1 km југо- nuta и Coccolithus pelagicus указује на приобалну западно од Коцељеве (западна Србија) и садржи средину са богатим уносом хранљивих материја велики број фосила, нарочито мекушаца. Међу- уз нормалан салинитет. На основу биострати- тим, старост седимената није прецизно одређена графске анализе фосилних асоцијација утврђено и у ранијим радовима је различито комента- је да истраживани седименти одговарају доњо- рисана. Ради провере ранијих биостратиграф- баденској Лагенидној зони. Ревидована старост ских закључака, током 2017. извршили смо седимената представљених у раду указује на теренска истраживања и дошли до значајних па- потребу за будућим истраживањима суседних леонтолошких података. Из три узорка седиме- региона. Неопходно је извршити ревизију горњег

Geol. an. Balk. poluos., 2019, 80 (1), 1–15 11 GORDANA JOVANOVIĆ, STJEPAN ĆORIĆ & SEJFUDIN VRABAC

бадена, одређеног само на основу зоне Rotalia говини (Прњаворски басен, североисточно Пот- beccarii (= Ammonia viennensis), како у Србији козарје и др.) и Хрватској (Боровњак итд.). (Коцељева, Раковички поток код Београда, СЗ Банат, Сопот, Младеновац, Аранђеловац, Колу- Manuscript recieved February 10, 2019 барски басен, и др.), тако и у Босни и Херце- Revised manuscript accepted June 06, 2019

12 Geol. an. Balk. poluos., 2019, 80 (1), 1–15 The First evidence of marine Badenian transgression near Koceljeva (Central Paratethys, western Serbia)

Plate 1. Detailed view of calcareous nannoplankton (a–e; scale bar 10 µm) and foraminifera assemblages (f–h; dimensions of foraminifera are 0,1–0,8 mm). a, Sphenolithus heteromorphus; b, Braarudosphaera bigelowii; c, Reticulofenestra minuta; d, Coronocycus nitences; e, Coccolithus pelagicus; f: 1. Quinqueloculina sp., 2. Lenticulina inornata, 3. Elphidium crispum, 4. Anomalinoides badenensis, 5. Cibicidoides ungerianus ungerianus, 6. Asterigerinata planorbis, 7. Elphidium rugosum, 8. Triloculina sp., 9. Dendritina haueri, 10. Porosononion granosum, 11. Triloculina sp., 12. Ammonia viennensis, 13. Bolivina sp., 14. Nonion commune, 15. Spirolina austriaca, 16. Trilobatus trilobus; g: 1. Lenticulina clypeiformis, 2. Porosononion granosum, 3. Borelis melo melo, 4. Bolivina antiqua, 5. Asterigerinata planorbis, 6. Nonion commune, 7. Elphidium crispum, 8. Globorotalia sp., 9. Ammonia viennensis, 10. Quinqueloculina buchiana; h: 1. Heterolepa dutemplei, 2. Pseudotriloculina consobrina, 3. Nonion commune, 4. Reussella spinulosa, 5. Ammonia viennensis, 6. Asterigerinata planorbis, 7. Bolivina sp., 8. Elphidium sp., 9. Textularia sp., 10. Textularia gramen gramen, 11. Bolivina antiqua.

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The First evidence of marine Badenian transgression near Koceljeva (Central Paratethys, western Serbia)

Plate 2. Detailed view of molluscan assemblage; Scale bar: 3,00 cm (a), 1,00 cm (b–k), 0,50 cm (l) a, Atrina pectinata; b, Strioterebrum (Strioterebrum) bistriatum; c, Venus nux; d, Calyptraea chinensis; e, Vaginella austriaca; f­g, Naticarius stercusmuscarum; h, Turritella badensis; I, Kalloconus berghausi; j, Semicassis laevigata; k, Azorinus chamasolen; l, Pro­ cardium danubianum.

Geol. an. Balk. poluos., 2019, 80 (1), 1–15 15