Natalia Hudackova

• PhD
• Comenius University Bratislava

The authigenic 10Be/9Be dating method is a relatively new geochronological technique that shows great potential for use in epicontinental sedimentary successions, largely due to its ability to date ubiquitous mud. However, the factors influencing the applicability of this method are not yet fully understood, which limits its robust application. Thi...

The Miocene sediments at the foothills of the Malé Karpaty Mts. are often rich in fossils , temporary outcrops are often not documented yet. This work presents findings from a construction pit southwest of the Dubová village, excavated during the construction activities. We have documented the fauna and flora of the marginal marine sediments of the...

Exceptional preservation of macrobenthic invertebrates with articulated remains is typically explained by episodic rapid burial events or by onset of anoxia, both aborting mixing and disintegration processes. However, these scenarios do not explain the preservation of articulated remains of infaunal organisms in the Lower Miocene diatom-rich mudsto...

The research at the Meszároš site located ca. 700 m southwest of the Dúbravská Hlavica (48.179985°, 17.008030°) was conducted as part of a field course of the Department of Geology and Paleontology in 2022–2023. This research brought noteworthy information about the paleoecology and biostratigraphy of the sediments at the Devínska Kobyla hill, a lo...

The presented multiproxy study sheds light on the intricate interplay between the biological and environmental factors which shaped the middle Miocene landscapes of the Paratethys region. Moreover, they highlight the diverse and dynamic nature of these ancient ecosystems. Here, we study the reasons for the predominance of nine miliolids in the Bade...

Long-term research of the Vienna Basin (Central Europe) has resulted in multiple stratigraphic concepts, though these are at least in part mutually exclusive. This contribution aims to reconsider the available information on the northeastern Vienna Basin, located in Slovakia, to create a consistent stratigraphic model. Lithostratigraphic correlatio...

This study provides a comprehensive examination of algal bioherm structures, including reefs and carpets that contain nannoplankton and foraminifera, originating from the upper Badenian (middle Miocene) strata of the Vienna Basin in the Central Paratethys. These lithofacies primarily consist of the carbonate red algal genus Lithothamnion. Through a...

This study provides a comprehensive examination of algal bioherm structures, including reefs and carpets that contain nannoplankton and foraminifera, originating from the upper Badenian (Middle Miocene) strata of the Vienna Basin in the Central Paratethys. These lithofacies primarily consist of calcareous red seaweeds from the Lithothamnion genus....

The aim of this study was to analyze temporal and spatial changes in paleoenvironments from demise of the Sarmatian Sea to the Lake Pannon transgression (~11.6 Ma), as an example of a sequence boundary in a semi- to fully isolated epicontinental basin. Borehole cores from the central Vienna Basin were subject to facies analysis, biostratigraphy, ge...

Authigenic 10Be/9Be dating is a promising method with the ability to date mudstone up to 14 million years, providing that the initial isotopic ratio could be determined and that the input of isotopes remained stable over the dated period. In a recent case study redeposition of mud violated the condition of stable beryllium isotopic input in a fluvi...

Authigenic 10Be/9Be dating is a promising method with the ability to date mudstone up to 14 million years, providing that the initial isotopic ratio could be determined and that the input of isotopes remained stable over the dated period. In a recent case study redeposition of mud violated the condition of stable beryllium isotopic input in a fluvi...

The spherical encompassing final chamber of the planktonic foraminifera Orbulina universa is a prime example of a complex character whose evolution has been documented by a sequence of intermediate forms. However, the mechanism that induced evolution of the spherical chamber remain unclear. Here we show that shortly after the emergence of Orbulina,...

The Transcarpathian Basin, consisting of the Prešov and Trebišov sub-basins, is situated at the border of the Western and Eastern Carpathians. Hydrocarbon exploration in this basin has been ongoing for more than 60 years and reserves of economic importance are located in the E to NE part of the basin. The Trebišov sub-basin was analysed to characte...

The cross-border correlations of the Miocene lithostratigraphic units (Slovakia, Austria) remain poorly constrained, owing to the various sources of clastic material transported into the basin and the low stratigraphic resolution of conglomerates. Therefore, this study is focused on the Lower and Middle Miocene conglomerates in the deltaic systems...

The main objective of this work was to interpret the environment during a very dynamic paleoenvironmental change from the Badenian to the Sarmatian in the Central Paratethys, as well as to determine ecologic factors, diversity, and the relationship between the foraminiferal morphogroups in the northern part of the Vienna Basin. The samples of this...

In a recent paper by Palcu et al. (2021: Scientific Reports 11, Art. Nr.: 11471), the Cape Panagia section on the Taman peninsula (Russian Black Sea) was dated using magnetostratigraphy, in order to calibrate the timing of previously published regressions of the Paratethys megalake. The authors of the paper claim that this “largest megalake in the...

Thirty-eight otolith-based species of fishes and 41 foraminifera species have been recorded in the Borský Mikuláš-Vinohrádky section in the upper Badenian deposits in the eastern part of the Vienna Basin, in West Slovakia. Two new species of otoliths are introduced here: Thorogobius antirostratus n. sp. and Gerres mlynskyi n. sp. Among the foramini...

The Danube Basin represents a northwestern depocenter of the Middle Miocene Central Paratethys Sea, which was succeed by the Late Miocene Lake Pannon. Although this is an extensively examined area, the application of multidisciplinary studies has proven capable of drawing attention to novel information concerning the depositional environment. Thus,...

International chronostratigraphic chart showing division of geological time and its numerical ages is regularly updated by the International Commission on Stratigraphy (ICS). The Slovak chronostratigraphic chart has not been updated since the end of the 1980s. This paper provides an overview of standard procedures for deriving Slovak terms; introdu...

Dramatic tectonic and sea level changes of the Central Paratethys realm during the Middle Miocene (Late Badenian to Early Sarmatian) resulted in the coastal morphology and seabed changes affecting marine association composition and distribution of the facies along the coast. Three different episodes in the environmental evolution were interpreted i...

The sedimentary fill of the Danube Basin represents the northwestern part of the Central Paratethys Sea. The middle Miocene opening of the basin was associated with volcanic activity. The altered tuff to tuffite layers from the northwest part of the Danube Basin occurs within the NN5 Zone and are accompanied by volcanic sediments with andesite clas...

Planktonic foraminifera precipitate calcite shells, which after the death of the organisms are exported to the seafloor. Globally, the resulting calcite flux constitutes up to half of the pelagic calcite flux. Given their importance for the marine calcite budget and for the carbonate counter pump, which counteracts the biological pump in terms of o...

A marked 120 My gap in the fossil record of vampire squids separates the only extant species (Vampyroteuthis infernalis) from its Early Cretaceous, morphologically-similar ancestors. While the extant species possesses unique physiological adaptations to bathyal environments with low oxygen concentrations, Mesozoic vampyromorphs inhabited epicontine...

HC-4 well was drilled nearby the Holíč water reservoir well in 2020 by Aqua-Geo company to build a new water reservoir. This work aims to interpret foraminifera associations from the ditch cuttings of the Neogene (Sarmatian) sediments of the Holíč and Skalica formations (Vienna Basin). Deposits from (130-88 m) were assigned to the Elphidium hauerin...

The Miocene global climatic changes together with profound regional tectonic activity significantly influenced the Central Paratethys epicontinental sea. The aim of this study was to reveal relationships between regional and global changes during the beginning Middle Miocene Climatic Transition. The work focused on the northern margin of the Pannon...

The Miocene genus Rzehakia, an endemic brackish bivalve that lived in the Paratethys Sea, recorded in late Ottnangian sediments deposited during the regression of the Central Paratethys Sea in the semi-enclosed Alpine-Carpathian foreland basin, is closely related to the Rzehakia found hundreds of kilometres away in the early Badenian transgressive...

The late Badenian and Sarmatian (Serravallian) evolution of depositional environments in the Danube Basin (Želiezovce Depression) has never been fully explored. Here, we clarify the paleoenvironmental changes which took place in this area during the late Badenian and Sarmatian on the basis of sedimentological, petrographic, biostratigraphic and pal...

The Oligocene Tard and Kiscell formations represent classical source rock examples in the Hungarian part of the Danube Basin. Similar sediments recorded in the Slovak part of the Danube Basin were studied by Rock-Eval pyrolysis in this paper, while their stratigraphic position was supported by the foraminiferal and nannoplankton biostratigraphy. Re...

Deep wells penetrated Cenozoic sedimentary record of two different basins: 1) Oligocene retro-arc basin which is buried under the 2) Miocene back-arc Danube Basin. This study is focused on biotic and abiotic proxies discussed in terms of existing biostratigraphical, paleoenvironmental and sedimentological data. Biotic proxies are represented by pal...

40 Ar/ 39 Ar radio-isotopic dating of volcanic tuffs intercalated in sediments can provide high accuracy age control on the deposition of sedimentary rocks. State-of-the-art mass spectrometers such as the ARGUS VI+ are able to acquire highly precise ages for relatively small single grains (~90-250 μm for Miocene samples). Single grain measurement c...

The Pozba-4 well (Poz-4; 48° 4' 43.07" N, 18° 27' 32.85" E) was drilled in the Northern Želiezovce Depression, of the Danube Basin and it uncovered 940 m thick sequence of Neogene sediments. The Cenozoic basement is formed by the Triassic dolomites and meta-sandstones. The main focus of this study are the sediments of the Pozba-Vráble Formation (up...

The Modrany-1 and Modrany-2 wells, drilled in the Želiezovce depression of the Danube Basin penetrated theMiocene (NN5, NN6 and NN9) and Oligocene (NP21-22) sedimentary record with total thickness exceeds 2200m. Biostratigraphy and sedimentology of MOD-1 well have been studied extensively in Kováč et al., 2018 and was delimitated pre-Neogene baseme...

Upper Cenozoic epicontinental sequences of the Central Paratethys often have a poorly constrained geochronological framework due to highly endemic fauna, lack of datable volcanic ashes and discontinuous depositional record unsuitable for magnetostratigraphy. As a novel geochronological tool, we used the authigenic 10Be/9Be dating method, which is a...

Upper Miocene (lower Tortonian) foraminifers are a little-known group of organisms in the Pannonian Basin System of the Central Paratethyan realm. The scarcity of the mostly endemic species in the sedimentary record is caused by changes in ecological conditions at the end of the Miocene epoch when the paleogeographical evolution of the area resulte...

The Vienna Basin is a SSW-NNE oriented Neogene basin of about 200 km length and 55 km width. It spreads from Czech and Slovak Republic in the north to Austria in the south. Due to geological prospecting and exploration of hydrocarbons, there was gathered a high level of knowledge about the sedimentary fill of the basin. The Planinka Fm. was descri...

The Komjatice depression, situated on the Danube Basin’s northern margin, represents a sub-basin of the Neogene epicontinental Central Paratethys Sea and Lake Pannon. The paper provides an insight into the character of sediment provenance evolution by study of well cores (ZM-1, IV-1, MOJ-1, VR-1 wells). A modern combination of provenance, sedimento...

Shallow-marine strata of the Ghar Formation exposed along the Kuwait arch in the north of Kuwait contains fields of mud volcanoes associated with an assemblage dominated by pectinid bivalves and callianassid ghost shrimps. The depositional palaeoenvironment is interpreted to be intertidal to subtidal with the water depth not exceeding 50 m and with...

Depositional sequences originating in semi-enclosed basins with endemic biota, partly or completely isolated from the open ocean, frequently do not allow biostratigraphic correlations with the standard geological time scale (GTS). The Miocene stages of the Central Paratethys represent regional chronostratigraphic units that were defined in type sec...

The Mediterranean Basin is a semi-enclosed basin highly sensitive to climate changes such as evaporation-precipitation processes and glacial-interglacial transitions. It is composed by two main basins, the Western Mediterranean and the Eastern Mediterranean, which are differently sensitive to the high latitude and low latitude climate interactions....

The Danube Basin is situated between the Eastern Alps, Western Carpathians and Transdanubian mountain ranges and represents a classic petroleum prospection site. The basin fill is known from many 2D reflection seismic lines and deep wells with measured e-logs which provided a good opportunity for theories about its evolution. New analyses of deep w...

For the first time, we report an ancient cuttlefish ink sac possessing microbodies from the lower Serravallian (Middle Miocene) deposits of the Vienna Basin (Central Paratethys). We compare the geochemistry of these microbodies with the ink sac of the extant genus Sepia. The unique preservation of the cuttlefish soft tissue resulted from a high sed...

Orbulina suturalis (Brönnimann, 1951) is a planktic foraminifera species that occurred in the Central Paratethys during the Middle Miocene, throughout the Badenian (Langhian, Serravallian) stage. Despite the stratigraphic and paleoecologic significance, the ontogeny of the species remained seldom explored. In this study the inner shell morphology w...

A comprehensive " model " of the semi-closed Central Paratethys Sea history was proposed for the entire time span of 25 Ma. Publications and datasets of the last decades were compiled and reviewed in the light of the Western Carpathian basins record, reflecting its changing palaeogeography, palaeoenvironment, and water circulation regimes. Moreover...

Middle Miocene foraminiferal assemblages from the Central Paratethys commonly contain polythalamous planktic foraminifera species Praeorbulina circularis (Blow, 1964), Orbulina suturalis (Brönnimann, 1951) and Velapertina indigena (Luczkowska, 1955). In spite of their biostratigraphic importance within the Western Carpathians region, their ontogene...

Epibionts are uniquely valuable in their ability to constrain paleoecological hypotheses about their own as well as their host’s behavior and environment. Rarely preserved epizoic bryozoans are here reported on fossil crabs from the Miocene Mishan Formation in the Zagros Basin of southwestern Iran. One-hundred-thirty-eight decapod crustaceans were...

The data on the Neogene geodynamics, palaeogeography, and basin evolution of the Western Carpathians, Northern Pannonian domain and adjoining areas (ALCAPA Mega-unit) are summarized, re-evaluated, supplemented, and newly interpreted. The proposed concept is illustrated by a series of palinspastic and palaeotopographic maps. The Miocene development...

Dramatic tectonic and sea level changes of the Central Paratethys realm during the Middle Miocene resulted in changes of the coastal and seabed morphology affecting the composition of the marine association and the distribution of the facies along the coast. Three different episodes (marine-terrestrial-marine) in the environmental evolution are int...

Species Orbulina suturalis (Brönnimann, 1951) represents a common Middle Miocene planktonic foraminifera in the Western Carpathians region. Despite their abundance and stratigraphic significance, the ontogenetic evolution of Orbulina suturalis is seldom explored. In this investigation, the morphology of the prolocular, juvenile, neanic, adult and t...

Presented research paper deals with the ontogenetic development of enigmatic taxa Velapertina indigena. Species were obtained from Upper Badenian sediments of the Transylvanian Basin and the ontogenetic stages were interpreted by using a tomographic microscope.

Two sepiid genera, Notosepia Chapman, 1915, and Sepia Linnaeus, 1758, are described from the Neogene deposits of Australia. A new and unique record of the middle Miocene Sepia sp. is reported from southern Australia. Based on similarities to contemporaneous sepiids, the new sepiid cuttlebone described herein belongs to the genus Sepia. Notosepia cl...

The early–late Serravallian boundary (Badenian–Sarmatian) is a key interval for understanding Central Paratethys evolution. Environmental changes resulted in a great regional faunal turnover known as the Badenian-Sarmatian extinction event (BSEE). Here, we present a high-resolution sedimentological and biostratigraphical study from a rare site loca...

The dependence of skeletal alteration on time spent in the taphonomic active zone (TAZ) can generate a taphonomic clock, which can be used to quantify scales of time averaging and rates of skeletal production and recycling in the fossil record. However, the strength of the taphonomic clock is variable in present-day shallow marine environments and...

The Danube Basin is situated between the Eastern Alps, Central Western Carpathians and Transdanubian Range. The northwestern embayment of the basin is represented by the Blatné depression with deposits ranked into the Langhian–Serravallian (Badenian, Sarmatian) and Tortonian–Pliocene (Pannonian–Pliocene). They are documented by the NN4, NN5 and NN6...

Cephalopod shells can be affected by postmortem transport and biostratigraphic condensation, but direct estimates of the temporal and spatial resolutions of cephalopod assemblages are missing. Amino acid racemisation calibrated by 14C demonstrates a centennial-scale time averaging (<500 years) of Nautilus macromphalus in sediment-starved, epi- and...

A new and locally abundant species of Sepia, S. juliebarborarum sp. nov., and single records of S. aff. loerentheyi and S. aff. sanctacrucensis from the upper Badenian of Slovakia and Austria, S. mikuzi sp. nov., S. aff. mikuzi sp. nov. and Sepia sp. from the middle Badenian of Slovenia, document a greater Miocene sepiid diversity in the Central Pa...

We describe species-rich chiton assemblages from the Middle Miocene of the Slovak part of the Vienna Basin and the Danube Basin (Central Paratethys). They were found at five localities, including Devínska Nová Ves brickyard, Devínska Nová Ves-Útočnica, Rohožník clay pit, Kúty-45 borehole and Dubová. Thirteen species belong to eight genera from the...

The Ratkovce 1 well, drilled in the Blatné depocenter of the northern Danube Basin penetrated the Miocene sedimentary record with a total thickness of 2000 m. Biostratigraphically, the NN4, NN5 and NN6 Zones of calcareous nannoplankton were documented; CPN7 and CPN8 foraminifer Zones (N9, 10, 11 of the global foraminiferal zonation; and MMi4a; MMi5...

Decapod crustacean assemblages from the Middle Miocene (lower 'Badenian'=Langhian) volcanoclastic Plášt'ovce Beds (Sebechleby Formation) in the Slovakian part of the Novohrad-Nógrad Basin comprise five species in five families (Callianassidae, Laomediidae, Munididae, Cancridae and Retroplumidae) and are dominated by the cancrid crab Tasadia carniol...

Brachiopods and bryozoans are described for the first time from the upper part of the Sandberg section (Vienna Basin, Central Paratethys, Slovakia) dated by foraminifers and calcareous nannoplankton as Early Sarmatian (= Late Serravallian). Three brachiopod species, i.e. Gryphus miocenicus (Michelotti, 1847), Argyrotheca cuneata (Risso, 1826) and J...

The Çankiri Basin, located in the northern part of the Central Anatolian Plateau, is a large Tertiary basin where thick Miocene to Quaternary continental sediments overlay the Cretaceous-Tertiary units. This investigation focuses on the Tuǧlu Formation, an Upper Miocene succession mainly composed of dark grey silty and organic rich clays. The type...

The vertebrate fossil record from the Dúbravka-Pole site in the territory of Devínska Kobyla consists of Brachypotherium cf. brachypus and Lartetotherium sp. dental and osteological remains. The both taxa lived in swampy to forested land at the shore of shallow brackish sea (or lagoon?) during the Early Sarmatian (MN 7/8). Their occurrence is proba...

Middle Miocene strata exposed at Devínska Kobyla Hill (Malé Karpaty Mts.) document the temporal and spatial changes in shallow-water environments of the Northern Vienna Basin during the Late Badenian and Early Sarmatian. Middle Miocene deposits border this hill essentially along its full perimeter. The present overview of 16 localities based on pub...

A redescription of two Middle Miocene burrowing ghost shrimps of the Central Paratethys, Callianassa brocchii Lorenthey, 1897 and Callianassa pseudorakosensis Lorenthey in Lorenthey & Beurlen, 1929, is provided. Material forming the basis of this study comes from the Studienka Formation (lower 'Sarmatian', Serravallian) of the Slovak part of the Vi...

The timing and pattern of surface uplift of Miocene marine sediments capping the southern margin of the Central Anatolian Plateau in southern Turkey provide a first-order constraint on possible mechanisms of regional uplift. Nannofossil, ostracod, and planktic foraminifera biostratigraphy of the Başyayla section (Mut-Ermenek Basin) within the Mut a...

Many examples of drifted Aturia shells in shallow littoral deposits have been reported worldwide, suggesting that the paleobiogeographic distribution of this Cenozoic nautilid could be a mere post-mortem artifact. An exceptional Lower Miocene deposit from the Central Paratethys yields abundant (about 500 specimens) and very well-preserved newly hat...

At the northern margin of the Mut-Ermenek Basin (Southern Turkey), well exposed, undeformed Mioc ene marine deposits cap the basement rocks of the southern margin of the Central Anatolian Plateau (CAP). From the Başyayla section, whic h ranges from 1781 m a.s.l. at the base to 1839 m a.s.l. at the top, we collec ted 24 samples, for a total thic kne...

The grey, grey-green, grey-brown claystone, silty claystone and silts yield foraminiferal association of Sarmatian (Upper Serravallian 12.7–11.6 Ma). The studied deposits belong to the Holíč Formation. The foraminiferal assemblages suggest a very shallow water depositional environment. In such conditions, the environment can change rapidly in depen...

Stable isotope data of the foraminiferal carbonate shells and bulk sediment samples from the Central Paratethys were investigated to contribute to better knowledge of the paleoenvironmental changes in Badenian (Middle Miocene). Five benthic (Uvigerina semiornata, U. aculeata, Ammonia beccarii, Elphidium sp. and Heterolepa dutemplei) and three plank...

Late Badenian foraminifers from the Vienna Basin (Central Paratethys): stable isotope study and paleoecological implications Paleoecological interpretations based on stable isotope study of benthic ( Uvigerina semiornata ) and planktonic ( Globigerina bulloides, Globigerinoides trilobus ) foraminiferal shells from the Paratethys Vienna Basin (south...

The Danube Basin situated at the Alpine–Carpathian–Pannonian junction represents a region of the Central Paratethys strongly influenced by orogen building processes and climatic changes. The geodynamic development mirrors gentle docking of the Carpathians into the European platform margin, associated with synrift and later postrift subsidence of th...

Abstrakt. Zmeny paleogeografie a paleoklimatických podmie-nok počas miocénu a pliocénu výrazne ovplyvnili akvatické a terestrické ekosystémy, ako aj rozmanitosť paleobiotopov v oblasti Západných Karpát. Štúdium týchto udalostí v čase a priestore bolo predmetom výskumov v rámci účasti sloven-ských geológov a paleontológov na projekte ESF – EEDEN (Eu...

The Vienna Basin, depositional systems of alluvial plains, deltas, littoral and neritic areas have been characterized to recognize the development of aquatic and terrestrial environments during the paleogeographic evolution of the basin. Their mutual interrelationship was discussed to be triggered by sea-level changes. Based on evaluation of the se...

Interaction of sea-level changes and tectonics had an important influence on the paleogeography and thereby also on the paleoenvironment of the Western Carpathian - North Pannonian Basins, which formed the northern bays of the Central Paratethys epicontinental sea in the Miocene. The depth and the shape of the basins were predominantly controlled b...

The calcareous nannoplankton and foraminifers have been studied in the lithostratigraphic formations of the Lower and Middle Miocene sediments of the Vienna Basin (Slovak part). Nannoplankton Zones NN 2 (Eggenburgian), NN3 (Ottnangian), NN4 (Karpatian), NNS and NN6 (Badenian) have been identified. On the basis of the mentioned zones a correlation w...

The accumulation of vertebrate mostly mammal skeleton fragments in the “Bone Valley” at Hajnáèka — a type locality of the European Neogene Mammal time-scale, zone MN 16 and/or subzone MN 16a came into existence in a lake with water influx and outlet. After cessation of the phreatomagmatic eruptions responsible for the maar creation, the maar was fi...