Lodowski, Damian Gerard and Pszczółkowski, Andrzej and Szives, Ottilia and Főzy, István and Grabowski, Jacek (2022) Jurassic–Cretaceous transition in the Transdanubian Range (Hungary): integrated stratigraphy and paleomagnetic study of the Hárskút and Lókút sections. NEWSLETTERS ON STRATIGRAPHY, 55 (1). pp. 99-135. ISSN 0078-0421
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Abstract
A high-resolution stratigraphic calibration is presented using biostratigraphic (calpionellids, calcareous dinoflagellates, calcareous nannofossils), magnetostratigraphic and chemostratigraphic (delta 13C, Al) techniques on the uppermost Jurassic-lowermost Cretaceous sedimentary successions from Harskut and Lokut in the Bakony Mountains (Transdanubian Range, Hungary). These localities are characterized by noticeably distinct facies developments, despite their geographic proximity. Relatively condensed deposits of early Tithonian-early Valanginian age (ca. 15 m thick; M22r-M13r magnetozones) in the Harskut succession revealed stratigraphic discontinuities; however, our methodology allowed us to identify hiatuses and condensation levels within the magnetostratigraphic record. The Tithonian-Berriasian boundary, marked by the base of the Alpina calpionellid Subzone, falls in the M19n magnetozone, below the base of the NC0 calcareous nannofossil Zone. In turn, the Berriasian-Valanginian boundary, marked by the base of the Calpionellites darderi calpionellid Subzone, is located in magnetozone M14r, below the base of the NC3 nannofossil Zone. A continuous record of Maiolica-type lower Berriasian limestone is exposed in the Lokut succession, between magnetozones M21r-M17n. A consistently decreasing lithogenic influx throughout the Tithonian-lower Berriasian is correlated with a Tithonian trend of climate aridization, while elevated upper Berriasian influxes primarily correspond to tectonic activity within the Neotethyan Collision Belt. The demise of the Saccocoma microfacies and the timing of Nannofossil Calcification Events are interpreted as both mutually related to paleoceanographic changes.
| Item Type: | Article |
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| Additional Information: | Funding Agency and Grant Number: National Science Center, PolandNational Science Centre, Poland [2016/21/B/ST/10/02941]; OTKA/NKFIOrszagos Tudomanyos Kutatasi Alapprogramok (OTKA) [K123762] Funding text: Our warmest thanks go to Jordan Todes for linguistic consultations. Also, we would like to kindly thank Laszlo Fodor for sharing with us his observations on the structural geology of the studied sections. Last, but not least, we would like to thanks to the reviewers of this manuscript: PhD Justyna Kowal-Kasprzyk (AGH University of Science and Technology in Krakow), prof. Jim Ogg (Department of Earth and Atmospheric Sciences, Purdue University) and anonymous Reviewer C, for their valuable remarks and comments regarding issues discussed herein. These investigations were financially supported by the National Science Center, Poland (project no.: 2016/21/B/ST/10/02941 -project leader: J. Grabowski; PGI-NRI, Warsaw) and OTKA/NKFI project no: K123762 -project leader: I. Fozy. Photographic documentation of studied sections is provided as Appendices 8-11. Supplementary paleomagnetic, rock magnetic, geochemical and fossil occurrence tables are included as.xlsx file (Appendix 12). |
| Subjects: | Q Science / természettudomány > QH Natural history / természetrajz > QH526 Paleontology / őslénytan |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 23 Nov 2023 08:45 |
| Last Modified: | 23 Nov 2023 08:52 |
| URI: | http://real.mtak.hu/id/eprint/180732 |
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