The stratigraphic and paleoenvironmental setting of Aptian OAE black shale deposits in the Pieniny Klippen Belt, Slovak Western Carpathians
| Autor: | Otília Lintnerová, Petr Skupien, Jozef Michalík, Marta Bąk, Eva Halásová, Daniela Boorová, Ján Soták |
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| Rok vydání: | 2008 |
| Předmět: |
dinocysts
Mediterranean climate nannoplankton biology Aptian Terrigenous sediment foraminifera Paleontology biology.organism_classification Cretaceous radiolarians Sedimentary depositional environment Foraminifera chemistry.chemical_compound early Aptian chemistry Carbonate Upwelling C and O isotopes Geology |
| Zdroj: | Cretaceous Research. 29:871-892 |
| ISSN: | 0195-6671 |
| DOI: | 10.1016/j.cretres.2008.05.005 |
| Popis: | During the Jurassic and Cretaceous, the Pieniny Klippen Belt units of the Outer Western Carpathians were situated on the edge of the Paleoeuropean shelf rimming the northermost margin of the Mediterranean Tethys. During the late early Aptian humid event, Lower Cretaceous pelagic carbonate (Maiolica) sedimentation was interrupted by terrigenous input as a consequence of the first major mid-Cretaceous climate perturbations. The fluctuation of radiolarian abundance indicated an expansion of the oxygen-minimum zone due to upwelling conditions and salinity changes. Foraminifera, radiolarians, non-calcareous dinocysts, and calcareous nannofossils encountered in the West Carpathian Rochovica section enable a comparison of the black shales of the upper lower Aptian Koňhora Formation with the well-known Selli Event. Subsequent anoxia patterns (depositional, productive, and stagnant) have taken part in the depositional regime. Early Aptian climate perturbations both in the Outer Western Carpathians, Swiss Prealps (situated in a similar position on the distal southern edge of the former Paleoeuropean shelf) and/or in other parts of the world are traceable with sedimentological, biological, and chemical proxies. |
| Databáze: | OpenAIRE |
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