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Geologia Croatica, Vol. 63 No. 3, 2010.

Original scientific paper

https://doi.org/10.4154/GC.2010.21

Evidence for Badenian local sea level changes in the proximal area of the North Croatian Basin

Koraljka Bakrač ; Hrvatski geološki institut
Valentina Hajek-Tadesse ; Hrvatski geološki institut
Mirjana Miknić ; Hrvatski geološki institut
Anita Grizelj ; Hrvatski geološki institut
Ivan Hećimović ; Hrvatski geološki institut
Marijan Kovačić ; Mineraloško-petrografski zavod Prirodoslovno-matematičkog fakulteta

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Abstract

Quantitative analysis of palynomorphs, foraminifera and ostracods enabled the recognition of biotic events and the reconstruction of environmental change in the Badenian sediments from the Vrhovčak section of Mt. Samoborsko gorje (NW Croatia). During the Middle Miocene the investigated area of Mt. Samoborska gora was located at the south-western margin of the North Croatian Basin, which represents the south-western edge of the Pannonian Basin System and the Central Paratethys Basin. This marginal position within the basin controlled the specific evolution of the depositional area during the Badenian. The occurrence of coal bearing horizons and freshwater flora and fauna in the middle part of the Vrhovčak section provide new data for the reconstruction of Badenian palaeoenvironments. A fall in sea level and the probable isolation of this area in the Badenian seems to be responsible for the appearance of a new fauna and flora.

The marine sediments from the base of the Vrhovčak section may be correlated to cycle TB 2.4 of the main Badenian transgression, which affected the entire Central Paratethys area. This was followed by a regression and lowstand (Ser2), which, correlated to the middle part of the section, with freshwater sediments and coal bearing horizons. The upper part of the Vrhovčak section with marine sediments represents the Late Badenian cycle TB 2.5.

Keywords

Miocene; Badenian; North Croatia Basin; Coal bearing horizons; paleoecology; biostratigraphy

Hrčak ID:

60997

URI

https://hrcak.srce.hr/60997

Publication date:

31.10.2010.

Article data in other languages: croatian

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