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Paleoenvironments during the Rhaetian transgression and the colonization history of marine biota in the Fatric Unit (Western Carpathians)

Abstract

Terminal Triassic environmental changes are characterized by an integrated study of lithology, litho- and cyclostratigraphy, paleontology, mineralogy, geochemistry and rock magnetism in the Tatra Mts. The Carpathian Keuper sequence was deposited in an arid environment with only seasonal rivers, temporal lakes and swamps with scarce vegetation. Combination of a wide range of δ18O values (-0.7 to + 2.7) with negative δ13C values documents dolomite precipitation either from brackish or hypersaline lake water, or its derivation from pore water comparably to the Recent Coorong B-dolostone. Negative δ13C values indicate microbial C productivity. Rhaetian transgressive deposits with restricted Rhaetavicula fauna accumulated in nearshore swamps and lagoons. Associations of foraminifers, bivalves and sharks in the Zliechov Basin were controlled by physical factors. Bivalve mollusc biostromes were repetitively destroyed by storms, and temporary firm bottoms were colonized by oysters and burrowers. Subsequent black shale deposition recorded input of eolian dust. Bottom colonization by pachyodont bivalves, brachiopod and corals started much later, during highstand conditions. Facies evolution also revealed by geochemical data, C and O isotope curves reflect eustatic and climatic changes and help reconstruct the evolution of Rhaetian marine carbonate ramp. The Fatra Formation consists of 100 kyr eccentricity and 40 kyr obliquity cycles; much finer rhythmicity may record monsoonlike climatic fluctuations. Fluvial and eolian events were indicated by analysis of grain size and content of clastic quartz, concentrations of foraminiferal (Agathammina) tests in thin laminae indicates marine ingression events. Magnetic susceptibility (MS) variations reflect the distribution of authigenic and detrital constituents in the sequence. Increasing trend of MS correlates with the regressive Carpathian Keuper sequence and culminates within the bottom part of the Fatra Formation. Decreasing trend of MS is observed upwards the transgressive deposits of the Fatra Formation.

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Mineral stability of Fe-rich bentonite in the Mock-Up-CZ experiment

References Amman L., Bergaya F. & Lagaly G. 2005: Determination of the cation exchange capacity of clays with copper complexes revisited. Clay Miner. 40, 441-453. Bujdák J., Iyi N., Kaneko Y., Czimerová A. & Sasai R. 2003: Molecular arrangement of rhodamine 6G cations in the films of layered silicates: the effect of the layer charge. Physical Chemistry Chemical Physics 5, 4680-4685. Czimerová A., Bujdák J. & Dohrmann R. 2006: Traditional and novel methods for estimating the

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Bentonite from the Central Slovakia Volcanic Field – A Prospective Raw Material for Polish Industry

.E. & Marantos, I. (2016). Mineralogy, geochemistry and physical properties of bentonites from the Western Thrace Region and the islands of Samos and Chios, East Aegean, Greece. Clay Minerals, 51, 563-588. DOI: 10.1180/claymin.2016.051.4.03. Kraus, I., Čičel, B. & Machajdik, D. (1982). Origin and genesis of the clays resulting from alteration of rhyolite volcanic rocks in Central Slovakia. Geologica Carpathica, 33, 269-275. Kraus, I., Hroncová, Z., Horský, S. & Mihalič, A. (1989). Ložiská a výskyty bentonitov SSR. Deposits and occurrence of

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The emplacement mode of Upper Cretaceous plutons from the southwestern part of the Sredna Gora Zone (Bulgaria): structural and AMS study

.): Landolt-Bornstein numerical data and functional relationships in science and technology. Group V: Geophysics and space research. Vol. 1. Physical properties of rocks. Subvol. B. Springer , New York, 1-346. Boccaletti M., Manetti P. & Peccerillo A. 1974: The Balkanids as an instance of back-arc thrusts belt: Possible relation with the Hellenids. Geol. Soc. Amer. Bull. 85, 1077-1084. Boccaletti M., Manetti P., Peccerillo A. & Stanisheva-Vasileva G. 1978: Late Cretaceous high-potassium volcanism in Eastern Srednogorie

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Mineralogy, chemical composition and leachability of ash from biomass combustion and biomass–coal co-combustion

Science and Pollution Research, 20, 7917-7925. DOI 10.1007/s11356-013-1673-2. Lanzerstorfer, C. (2015). Chemical composition and physical properties of filter fly ashes from eight grate-fired biomass combustion plants. Journal of Environmental Sciences, 30, 191-197. DOI:10.1016/j.jes.2014.08.021. Lee, J. W., Hawkins, B., Day, D. M., & Reicosky, D.C. (2010). Sustainability: the capacity of smokeless biomass pyrolysis for energy production, global carbon capture and sequestration. Energy and Environmental Sciences, 11, 1695-1705. DOI: 10.1039/c004561f

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Fine and ultrafine TiO2 particles in aerosol in Kraków (Poland)

developing regulatory controls. Atmospheric Environment, 44 , 5035-5052. DOI: 10.1016/j.atmosenv.2010.08.016. Liu, K., Lin, X., & Zhao, J. (2013). Toxic effects of the interaction of titanium dioxide nanoparticles with chemicals or physical factors. International Journal of Nanomedicine , 8 , 2509-2520. DOI: 10.2147/IJN.S46919. Long, T., Saleh, N., Tilton, R., Lowry, G., & Veronesi, B. (2006). Titanium Dioxide (P25) Produces Reactive Oxygen Species in Immortalized Brain Microglia (BV2): Implications for Nanoparticle Neurotoxicity. Environmental Science and

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Assessing provenance of Upper Cretaceous siliciclastics using spectral γ-ray record

. 104, 1–374. Hu X., Jansa L., Wang C., Sarti M., Bąk K., Wagreich M., Michalík J. & Soták J. 2005: Upper Cretaceous oceanic red beds (CORBs) in the Tethys: occurrences, lithofacies, age and environments. Cretaceous Research 26, 3–20. IAEA 1990: The use of gamma ray data to define the natural radiation environment. IAEA-TECDOC-566 , Vienna, 1–173. Ingersoll R.V., Bullard T.F., Ford R.L., Grimm J.P., Pickle J.D. & Sares S.W. 1984: The effect of grain size on detrital modes: a test of the Gazzi–Dickinson point counting method. J. Sed. Petrology 54

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Tectono-sedimentary analysis using the anisotropy of magnetic susceptibility: a study of the terrestrial and freshwater Neogene of the Orava Basin

). Śmigielski M., Sinclair H.D., Stuart F.M., Persano C. & Krzywiec P. 2016: Exhumation history of the Tatry Mountains, Western Carpathians, constrained by low-temperature thermochronology. Tectonics 35, 1, 187-207. Tamaki M., Suzuki K. & Fujii T. 2015: Paleocurrent analysis of Pleistocene turbidite sediments in the forearc basin inferred from anisotropy of magnetic susceptibility and paleomagnetic data at the gas hydrate production test site in the eastern Nankai Trough. Mar. Petrol. Geol. 66, 404-417. Tarling D. H. & Hrouda F. 1993: The

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The cricetid rodents from Gratkorn (Austria, Styria): a benchmark locality for the continental Sarmatian sensu stricto (late Middle Miocene) in the Central Paratethys

(Mammalia, Rodentia, Muridae) assemblage from Sandelzhausen (Miocene, Southern Germany): a test on homogeneity. Paläont. Z. 83, 77-83. de Bruijn H. & Saraç G. 1991: Early Miocene Rodent Faunas from the Eastern Mediterranean Area. Part 1. The genus Eumyarion. Proc. K. Nederl. Akad. Wet. 94, 1, 1-36. de Bruijn H. & Ünay E. 1996: On the evolutionary history of the Cricetodontini from Europe and Asia Minor and its bearing on the reconstruction of migrations and the continental biotope during the Neogene. In: Bernor R

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Upper Miocene endemic lacustrine gastropod fauna of the Turiec Basin: addressing taxonomic, paleobiogeographic and stratigraphic issues

-110. Férussac J.B.L. d’Audebard de & Férussac A.E.J.P.J.F. d’Audebard de 1807: Essai d’une méthode conchyliologique appliquée aux mollusques fluviatiles et terrestres d’après la considération de l’animal et de son test. Nouvelle édition augmentée d’une synonymie des espèces les plus remarquables, d’une table de concordance systématique de celles qui ont été décrites par Géoffroy, Poiret et Draparnaud, avec Müller et Linné, et terminée par un catalogue d’espèces observées en divers lieux de la France. Delance, Paris, xvi + 1-142. Gašparík J., Brestenská E

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