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

作　　者：Viktor Karadi Tea Kolar-Jurkovsek Luka Gale Bogdan Jurkovsek 

机构地区：[1]Department of Palaeontology,Eotvos Lorand 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 Doipri Ljubljani,Slovenia

出　　处：《Journal of Earth Science》2021年第3期677-699,共23页地球科学学刊（英文版）

基　　金：partially supported by the Slovenian Research Agency(No.P1-0011);partially by the NKFIH PD-131536 Project。

摘　　要：This study presents the results of the conodont biostratigraphy and microfacies analysis carried out on the pelagic limestones of the Upper Triassic Dov?ko 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.

关 键 词：CONODONTS MICROFACIES Late Triassic NORIAN Lacian Alaunian Slovenian Basin cherty limestone 

分 类 号：P539[天文地球—古生物学与地层学] Q911.6[天文地球—地质学]