Abstract
Middle Triassic volcaniclastic depositsin the External Dinarides of Croatia and Bosnia and Herzegovina are related to the rifting of the Tethyan Ocean. Three localities in the External Dinarides: Donje Pazarište, Bosansko Grahovo and Zelovo were biostratigraphically analysed in this study. The Middle Triassic carbonate deposits with volcaniclastic interlayers in Donje Pazarište were defined by means of conodonts. Rare ammonoid specimens were collected.Recovered conodont and ammonoid taxa suggest these sections are of Early Illyrian to Early Fassanian Age. The section studied in Bosansko Grahovo is dominantly composed of volcanic and volcaniclastic rocks. Limestone peperites were collected for conodont analysis. Two conodont zones were defined, suggesting volcanic activity in the same, from Lower Illyrian to Fassanian, time interval. The Zelovo Section was biostratigraphically investigated by several authors. The pietra verde deposits from Zelovo are referred as late Fassanian to Early Longobardian Age. Biostratigraphic correlation from mentioned three localities imply that the magmatic activity in the External Dinarides, and formation of different volcaniclastic facies lasted from Illyrian to Longobardian, similar as in the surrounding western Tethyan territories.
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Acknowledgments
This research was a part of the first author Ph D thesis. The field investigations were carried out from 2014 to 2016. The authors would like to thank Prof. Leopold Krystyn for the determination of the ammonoid specimens. We would like to express our gratitude to F. Velledits for her constructive comments and suggestions for making this manuscript more precise and regionally valued, and the unknown reviewers for constructive and valuable comments for making the manuscript more organised and concise. The research was financed by the Croatian Ministry of Science and Education, and University of Zagreb financial support founds. This article is a contribution to IGCP 630. The final publication is available at Springer via https://doi.org/10.1007/s12583-018-0789-1..
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Smirčić, D., Kolar-Jurkovšek, T., Aljinović, D. et al. Stratigraphic Definition and Correlation of Middle Triassic Volcaniclastic Facies in the External Dinarides: Croatia and Bosnia and Herzegovina. J. Earth Sci. 29, 864–878 (2018). https://doi.org/10.1007/s12583-018-0789-1
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DOI: https://doi.org/10.1007/s12583-018-0789-1