http://www.sciencedirect.com/science/article/pii/S1674987111000855 |
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| Authors: | Jozef Michalík Daniela Reháková |
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| Institution: | 1. Slovakian Academy of Sciences, Geological Institute, Dúbravská cesta 9, P.O. Box 106, 840 05 Bratislava, Slovak Republic
2. Comenius University, Faculty of Natural Sciences, Department of Geology and Palaeontology, Mlynská dolina G-1, 842 15 Bratislava, Slovak Republic |
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| Abstract: | During the last decades, several integrated studies of Tethyan Jurassic/Cretaceous boundary
sections from different countries were published with the objective to indicate problems for the selection
of biological, chemical or physical markers suitable for identification of the Jurassic/Cretaceous
boundary e the only system boundary within the Phanerozoic still not fixed by GSSP. Drawing the
boundary between the Jurassic and Cretaceous systems is a matter of global scale discussions. The
problem of proposing possible J/K boundary stratotypes results from lack of a global index fossils,
global sea level drop, paleogeographic changes causing development of isolated facies areas, as well
as from the effect of Late Cimmerian Orogeny. This contribution summarizes and comments data on
J/K boundary interval obtained from several important Tethyan sections and shows still existing problems
and discrepancies in its determination. |
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| Keywords: | J/K boundary Interregional correlation Biostratigraphic proxies Calpionellids Nannofossils |
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