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Early Triassic conodonts and carbonate carbon isotope record of the Idrija-Žiri area, Slovenia

Author:
  • Yanlong Chen
  • Tea Kolar-Jurkovšek
  • Bogdan Jurkovšek
  • Dunja Aljinović
  • Sylvain Richoz
Publishing year: 2016-02-15
Language: English
Pages: 84-100
Publication/Series: Palaeogeography, Palaeoclimatology, Palaeoecology
Volume: 444
Document type: Journal article
Publisher: Elsevier

Abstract english


The first recovery of the conodont Hindeodus parvus from Žiri (Slovenia) a few years ago highlights this area for Early Triassic biostratigraphical study. Systematic sampling of five sections in the Idrija-Žiri area has yielded the new species Platyvillosus corniger sp. nov. and Neospathodus planus sp. nov. Based on these new species and other conodont elements collected here, nine discrete conodont Unitary Association (UA) zones are proposed for this area. In ascending order they are: Eurygnathodus costatus Zone (UA 1), Eurygnathodus hamadai Zone (UA 2), Foliella gardenae Zone (UA 3), Neospathodus robustus Zone (UA 4), Platyvillosus corniger Zone (UA 5), Platyvillosus regularis Zone (UA 6), Triassospathodus hungaricus Zone (UA 7), Triassospathodus symmetricus Zone (UA 8), and Neospathodus robustispinus Zone (UA 9). The conodont and δ
13
C data indicate that these conodonts span the Dienerian/Smithian (i.e. Induan/Olenekian) boundary interval to the Spathian, and they also indicate that Triassospathodus hungaricus Zone (UA 7) does not occur at the base of the Spathian. These conodont zones are valuable for stratigraphic correlation within Central and southern Europe, and they also promote a better correlation worldwide. Conodonts in the Idrija-Žiri area were adapted to a shallow-water environment in an epeiric ramp.

Keywords

  • Biostratigraphy
  • Conodont
  • Early Triassic
  • Paleoecology
  • Slovenia

Other

Published
  • ISSN: 0031-0182
Sylvain Richoz
E-mail: sylvain [dot] richoz [at] geol [dot] lu [dot] se

Senior lecturer

Lithosphere and Biosphere Science

+46 46 222 78 89

Sölvegatan 12, Lund

16