Santonian-Campanian Boundary Interval in the Kyunetsa Section, Western Srednogorie Zone, Bulgaria

Authors

  • Michael Wagreich Department of Geology, University of Vienna
  • Docho Dochev Department of Geology, Palaeontology and Fossil Fuels, Faculty of Geology and Geography, Sofia University “St. Kliment Ohridski”
  • Polina Pavlishina Department of Geology, Palaeontology and Fossil Fuels, Faculty of Geology and Geography, Sofia University “St. Kliment Ohridski”
  • Veronika Koukal Department of Geology, University of Vienna

DOI:

https://doi.org/10.7546/CRABS.2022.11.07

Keywords:

Santonian, Campanian, calcareous nannofossils, isotope data, magnetic susceptibility

Abstract

The Kyunetsa section, 2.5 km west of Kosharevo, exposes mainly pelagic Upper Cretaceous marly limestones and marls of the Srednogorie Zone, part of the intermediate Balkanides in Bulgaria. The Melove Formation of Coniacian to early Campanian age involves a prominent Santonian-Campanian boundary interval of grey and reddish sediments, including CORBs (Cretaceous Oceanic Red Beds). The base of the Campanian can be discerned in bed 7c by the first rare (single) occurrence of the nannofossil Broinsonia (Aspidolithus) parca parca. A positive carbon isotope peak below, and a field magnetic susceptibility peak above may enhance correlation to other Tethyan sites such as the proposed GSSP at Bottaccione (Italy), the Postalm section (Austria) and the Mudurnu-Göynük Basin (Turkey).

Author Biographies

Michael Wagreich, Department of Geology, University of Vienna

Mailing Address:
Department of Geology,
University of Vienna
Josef Holaubek-Platz 2
1090 Vienna, Austria

E-mail: michael.wagreich@univie.ac.at

Docho Dochev, Department of Geology, Palaeontology and Fossil Fuels, Faculty of Geology and Geography, Sofia University “St. Kliment Ohridski”

Mailing Address:
Department of Geology, Palaeontology and Fossil Fuels,
Faculty of Geology and Geography,
Sofia University “St. Kliment Ohridski”
15 Tsar Osvoboditel Blvd
1504 Sofia, Bulgaria

E-mail: dochev@gea.uni-sofia.bg

Polina Pavlishina, Department of Geology, Palaeontology and Fossil Fuels, Faculty of Geology and Geography, Sofia University “St. Kliment Ohridski”

Mailing Address:
Department of Geology, Palaeontology and Fossil Fuels,
Faculty of Geology and Geography,
Sofia University “St. Kliment Ohridski”
15 Tsar Osvoboditel Blvd
1504 Sofia, Bulgaria

E-mail: polina@gea.uni-sofia.bg

Veronika Koukal, Department of Geology, University of Vienna

Mailing Address:
Department of Geology,
University of Vienna
Josef Holaubek-Platz 2
1090 Vienna, Austria

E-mail: veronika.koukal@univie.ac.at

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Published

30-11-2022

How to Cite

[1]
M. Wagreich, D. Dochev, P. Pavlishina, and V. Koukal, “Santonian-Campanian Boundary Interval in the Kyunetsa Section, Western Srednogorie Zone, Bulgaria”, C. R. Acad. Bulg. Sci. , vol. 75, no. 11, pp. 1604–1612, Nov. 2022.

Issue

Section

Geology