Ölveczká D. & Reháková D., 2022: Upper Tithonian Crassicollaria Zone: new data on the calpionellid distribution and subzonal division of the Pieniny Klippen Belt in Western Carpathians. Acta Geologica Slovaca, 14, 1, 37–56.


Upper Tithonian Crassicollaria Zone: new data on the calpionellid distribution and subzonal division of the Pieniny Klippen Belt in Western Carpathians

Diana Ölveczká1,2 & Daniela Reháková2

1Earth Science Institute of the Slovak Academy of Sciences, Dúbravská Cesta 9, P.O.Box 106, 840 05 Bratislava, Slovakia; diana.olveczka@savba.sk
2Department of Geology and Paleontology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842 15 Bratislava, Slovakia; olveczka3@uniba.sk, daniela.rehakova@uniba.sk

Abstract

The study of two selected profiles of the Upper Jurassic to Lower Cretaceous sequences of the Western Carpathians enabled a revision of the calpionellid zonation used so far for this area and it resulted in the proposal of a new division of the Crassicollaria Zone. Biozonation was based on research in detail on carbonate sediments of the Pieniny Klippen Belt from the localities of Čertova skala and Kóta 720 – the ridge between Jarabina and Litmanová. The results were subsequently verified and correlated with the distribution of calpionellids in the Crassicollaria Zone in Brondo, Snežnica and Strapkova profiles. The present proporsal envisages the division of the Crassicollaria Zone into the Remanei, Intermedia and Colomi subzones. Currently, the calpionellids are important biomarkers for dating the Upper Jurassic and Lower Cretaceous pelagic carbonate sequences of the Tethyan area, the central Atlantic and the southeastern edge of the Pacific. Therefore, it is important to continue to refine and improve the calpionellid zonation in the light of new knowledge.


Key words: Calpionellid Zonation, Dinocyst Zonation, Crassicollaria Zone, subzonal division, Biostratigraphy, Microfacies, Late Jurassic, Western Carpathians


Manuscript received: 2022-02-11

Revised version accepted: 2022-05-31


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