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Multiproxy reconstruction of the middle Miocene Požega palaeolake in the Southern Pannonian 2 Basin (NE Croatia) prior to the Badenian transgression of the Central Paratethys Sea (CROSBI ID 257616)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Mandic, Oleg ; Hajek-Tadesse, Valentina ; Bakrač, Koraljka ; Reichenbacher, Bettina ; Grizelj, Anita ; Miknić, Mirjana. Multiproxy reconstruction of the middle Miocene Požega palaeolake in the Southern Pannonian 2 Basin (NE Croatia) prior to the Badenian transgression of the Central Paratethys Sea // Palaeogeography, palaeoclimatology, palaeoecology, 516 (2019), 203-219. doi: 10.1016/j.palaeo.2018.12.003

Podaci o odgovornosti

Mandic, Oleg ; Hajek-Tadesse, Valentina ; Bakrač, Koraljka ; Reichenbacher, Bettina ; Grizelj, Anita ; Miknić, Mirjana.

engleski

Multiproxy reconstruction of the middle Miocene Požega palaeolake in the Southern Pannonian 2 Basin (NE Croatia) prior to the Badenian transgression of the Central Paratethys Sea

The Pannonian Basin of Croatia is the largest back-arc extensional basin on the European continent, located between the Alps, Carpathians and Dinarides. Syn-rift subsidence started at ~18 Ma and predated the onset of the Miocene Climatic Optimum (MCO ; 17-14.7 Ma). In this paper, we investigate the evolution of the fluvial-lacustrine palaeoenvironment just prior to the transgression of the Central Paratethys Sea. Studies are based on a 17-m-thick section of the Požega palaeolake in the Southern Pannonian Basin using palaeobiological (mollusks, ostracods, palynomorphs, fish otoliths), mineralogical and sedimentological data. Our results reveal fluctuating freshwater and brackish conditions and a pulsating water budget, which we relate to phases in which the basin was, alternatively, hydrologically open and closed. We infer that the alternating environmental conditions can be best-explained by dry and wet periods, respectively. Droughts produced stagnant conditions, algae overproduction and increased salinity levels, supporting the survival of sporadically invading brackish water species. The wet periods, on the other hand, led to lake highstand episodes, expansion of its area, and to the onset of profundal settings. The lake basin eventually became overfilled and connected through outflowing rivers with the Central Paratethys sea. However, the absence of brackish-marine assemblages in the Požega palaeolake nevertheless indicates that there was no marine water inflow from the Central Paratethys at that time.

Central Paratethys ; Burdigalian-Langhian ; Miocene Climatic Optimum ; Palaeogeography ; Palaeoecology ; Palaeolimnology

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Podaci o izdanju

516

2019.

203-219

objavljeno

0031-0182

1872-616X

10.1016/j.palaeo.2018.12.003

Povezanost rada

Geologija

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