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"Small carbonaceous fossils (SCFs)": state of art
Kovář, Vojtěch ; Fatka, Oldřich (advisor) ; Dašková, Jiřina (referee)
The thesis deals with the problematics of Small Carbonaceous Fossils (SCF). In the first part of the thesis the term SCF is defined and the presentation of the main palynological approaches used for extraction of SCFs follows, together with an explanation of preservation processes of non-biomineralized organic structures in sediments. The explanation of significance for palaeontology and related disciplines is discussed. The main part of the thesis constitutes of descriptions of the individual published SCFs from the late Ediacaran up to the Devonian, together with stratigraphic context and lithology of the published material. The list of taxa, that were possible to identify among obtained SCF material, is included. All the localities of Phanerozoic age are further plotted into paleogeographic maps corresponding with the appropriate periods. The broad scope of SCF's paleogeographic provenance and the possibility of extraction of SCF from a wide spectrum of lithologies, deposited in various sedimentary environments is discussed and the potential of further studies of SCFs is outlined. Key words: organic microfossils and macrofossils, early Paleozoic, taphonomy, palynological preparation methods
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"Small carbonaceous fossils (SCFs)": state of art
Kovář, Vojtěch ; Fatka, Oldřich (advisor) ; Dašková, Jiřina (referee)
The thesis deals with the problematics of Small Carbonaceous Fossils (SCF). In the first part of the thesis the term SCF is defined and the presentation of the main palynological approaches used for extraction of SCFs follows, together with an explanation of preservation processes of non-biomineralized organic structures in sediments. The explanation of significance for palaeontology and related disciplines is discussed. The main part of the thesis constitutes of descriptions of the individual published SCFs from the late Ediacaran up to the Devonian, together with stratigraphic context and lithology of the published material. The list of taxa, that were possible to identify among obtained SCF material, is included. All the localities of Phanerozoic age are further plotted into paleogeographic maps corresponding with the appropriate periods. The broad scope of SCF's paleogeographic provenance and the possibility of extraction of SCF from a wide spectrum of lithologies, deposited in various sedimentary environments is discussed and the potential of further studies of SCFs is outlined. Key words: organic microfossils and macrofossils, early Paleozoic, taphonomy, palynological preparation methods
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Ichnofossils from the Lower Palaeozoic of the Železné hory Mts.
Doucek, Jan ; Mikuláš, Radek (advisor) ; Marek, Jaroslav (referee)
On five key sites of the Lower Palaeozoic of the Železné hory Mountains (Bačalský rybník, Bačalský mlýn, Palác, Rabštejn and Deblov) the detailed research involving the compilation of schematic lithostratigraphic profiles (exluding site Deblov) was conducted. Individuals of ichnotaxa Zoophycos that have maximum Middle Cambrian age were described on the site Palác. This is the third oldest finding in the world. Ichnotaxa Zoophycos was further described on the site Bačalský rybník, where they are exposed quartz siltstones, the equivalent of the Dobrotiv of the Barrandian area. Ichnofossils abundant in the study area are Skolithos, Pragichnus, to a lesser extend Phycodes and Monocraterion. Skolithos on the site Rabštejn occurs in extreme size (until 90 cm). On the site Deblov community of Skolitos ichnofacies on the area measuring hundreds of square meters were described. There was also performed ichnological imaging which showed proportional representation of each ichnotaxa. Study samples for microprobe showed differences in structure and chemistry of ichnofabrics up filling and surrounding environment.
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