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Conodont platform elements from selected sections of Devonian and their application in biostratigraphic correlation
Formáčková, Aneta ; Slavík, Ladislav (advisor) ; Kumpan, Tomáš (referee) ; Spalletta, Claudia (referee) ; Dojen, Claudia (referee)
The presented work consists of three separate papers that have been published in peer- reviewed journals. The published studies summarize and refine the existing knowledge about some conodont faunas of the Devonian with a primary focus on P1 elements and their potential in biostratigraphy. The dissertation thesis consists of three main parts. The first part is designed as an introduction, a summary of the objectives of the presented work, and methodologies used during the conodont sampling and sample processing and samples for thin sections. The second part of the work presents a general overview of the problems of conodont elements in biostratigraphy of the Devonian, characterizes the geological conditions and paleogeographic development of the areas from which the studied elements come from. The third part summarizes the results, brings a discussion on the herein presented data published in articles and contains the final word on the researched issues. The published studies on which this work is based are focused on platform elements of ozarkodinids and icriodontids, whose global distribution in time and space enables their study in different environments and stratigraphic levels. The microfacial characteristics of the studied sections and the issue of conodont biostratigraphy in the Devonian are...
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Family Spathognathodontidae (Conodonta) from the Silurian/Devonian boundary (sections Na Požárech and Praha-Radotín; Prague Synform) and its biostratigraphical correlation
Hušková, Aneta ; Slavík, Ladislav (advisor) ; Kumpan, Tomáš (referee)
This work is focused on conodont biostratigraphy of the Silurian/Devonian boundary interval in the Prague Synform. The Na Požárech and Praha-Radotín sections were selected in order to study conodont diversity and changes in conodont faunas in different carbonate facies - shallower and deeper-water limestones around the Silurian/Devonian boundary and also to test the assumption, whether differences in bathymetry affect the diversity of taxa of the family Spathognathodontidae. In total 22 samples were analysed, particularly 13 samples from the section Praha-Radotín and 9 samples from the section Na Požárech. All samples were processed in laboratory and the obtained conodont material was studied in detail. The conodont material is abundant in both sections (more than thousand elements) and shows a high diversity and disparity in the family Spathognathodontidae. In total 17 taxa were identified and a new species Zieglerodina petrea is described. This new taxon is easily recognizable because of a distinct morphology and could be usefull for the identification of the base of Devonian in the Prague Synform. Its potential use in global correlation will, however, need further and thorough studies. Also conodonts of the family Icriodontidae are surprisingly abundant in both sections. Thin sections (13 from...
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