New Advances in Biostratigraphy of the Lower/Middle Norian Transition: Conodonts of the Dovško Section, Slovenia

Viktor Karádi; Tea Kolar-Jurkovšek; Luka Gale; Bogdan Jurkovšek

doi:10.1007/s12583-020-1382-y

Volume 32 Issue 3

Jun 2021

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Journal of Earth Science > 2021 > 32(3): 677-699.

Viktor Karádi, Tea Kolar-Jurkovšek, Luka Gale, Bogdan Jurkovšek. New Advances in Biostratigraphy of the Lower/Middle Norian Transition: Conodonts of the Dovško Section, Slovenia. Journal of Earth Science, 2021, 32(3): 677-699. doi: 10.1007/s12583-020-1382-y

Citation:

Viktor Karádi, Tea Kolar-Jurkovšek, Luka Gale, Bogdan Jurkovšek. New Advances in Biostratigraphy of the Lower/Middle Norian Transition: Conodonts of the Dovško Section, Slovenia. Journal of Earth Science, 2021, 32(3): 677-699. doi: 10.1007/s12583-020-1382-y

Citation:

Viktor Karádi, Tea Kolar-Jurkovšek, Luka Gale, Bogdan Jurkovšek. New Advances in Biostratigraphy of the Lower/Middle Norian Transition: Conodonts of the Dovško Section, Slovenia. Journal of Earth Science, 2021, 32(3): 677-699. doi: 10.1007/s12583-020-1382-y

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New Advances in Biostratigraphy of the Lower/Middle Norian Transition: Conodonts of the Dovško Section, Slovenia

doi: 10.1007/s12583-020-1382-y

1.
Department of Palaeontology, Eötvös Loránd University, Budapest 1117, Hungary
2.
Geological Survey of Slovenia, Ljubljana 1000, Slovenia
3.
Department of Geology, University of Ljubljana, Ljubljana 1000, Slovenia
4.
Kamnica 27, 1262 Dol pri Ljubljani, Slovenia

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Corresponding author: Viktor Karádi, kavik.geo@gmail.com; karadi.viktor@ttk.elte.hu
Received Date: 09 Oct 2020
Accepted Date: 27 Nov 2020
Publish Date: 01 Jun 2021

Abstract

Abstract

This study presents the results of the conodont biostratigraphy and microfacies analysis carried out on the pelagic limestones of the Upper Triassic Dovško Section in Slovenia, which represents the eastern part of the Slovenian Basin. The age of the section ranges from the Lacian 1 to the Alaunian 1. The Lacian part of the succession is predominantly characterized by the representatives of the genus Ancyrogondolella. Transitional morphologies towards Alaunian faunas first appear in the Lacian 3 and become common during the Lacian-Alaunian transition. This evolutionary development coincides with a shift in microfacies from a dominantly radiolarian-bearing mudstone-wackestone-packstone to a filament-dominated wackestone-packstone, and the formation of small neptunian dykes, which may reflect environmental perturbations and/or a change in basin geometry. The proliferation of the genera Epigondolella and Mockina is observed in the Alaunian part of the section, though the genus Ancyrogondolella is still present in this interval. Systematic description of the conodont taxa is provided, and seven new species and two new subspecies are established. The new advances will be of great value in further biostratigraphic studies, especially in areas without ammonoid faunas, and in the reconstruction of the paleogeography of the Slovenian Basin.
- conodonts,
- microfacies,
- Late Triassic,
- Norian,
- Lacian,
- Alaunian,
- Slovenian Basin,
- cherty limestone

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