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Actual knowledge on early Paleozoic cryptospores
Fučíková, Kateřina ; Fatka, Oldřich (advisor) ; Kováčová, Marianna (referee)
The goal of the thesis is to summarize the state of art in uderstanding of Cambrian, Ordovician and Silurian cryptospores. The actual knowledge on stratigraphic range, geographic distribution and classification of cryptospores will be summarized. A special attention will be focussed on already published data on cryptospores from the Barrandian area. These data data will be utilised in the following master thesis focussed on study of Cambrian to Silurian cryptospores with application of the low manipulation HF extraction methodology of samples from the Barrandian area. Keywords: cryptospores, Cambrian, Ordovician, Silurian
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Tests of selected methods leading to precise stratigraphy of the Králův Dvůr Formation
Bartošová, Jarmila ; Kraft, Petr (advisor) ; Frýda, Jiří (referee)
A model study about the precise stratigraphy of the Kralodvorian Formation was made on the drill core from Ořech near Prague. The exposure at Levín was used as a reference section. Both sections were sedimentologicaly studied and described in detail. The study of thin sections was a supplemented for exact description of the rocks and lithotypes. Chemostratigraphic methods (?13C and TOC) and method of the rock magnetic susceptibility were used for detailed stratigraphic analyse. All the mentioned methods of both sections. Samples for the measurements of the magnetic susceptibility were taken by 0.5 m of thickness. The measurement of ?13C and TOC was taken from the non-wheathered 80 m of the drill core Ořech and from the upper 20 m Králův Dvůr Formation at Levín profile by 2 m. The available data show that Ořech represents low and middle part of the Kralodvorian strata and that all studied thickness (80 m) belongs to only positive excursion of ?13C. This excursion is interpreted to be the upper Katian. It gives an evidence that sedimentation of the Kralův Dvůr Formation was very fast. Identification and interpretation of this excursion makes possible the accurate interregional corelation of the strata. A precise regional stratigraphic subdivision is based on inhomogenities caused by different materials or...
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Selected cephalopods from the Ordovician of the Prague Basin (Bohemia) and Baltica (Estonia and Sweden): taxonomy, paleobiogeography and paleoecology
Aubrechtová, Martina ; Košťák, Martin (advisor) ; Klug, Christian (referee) ; King, Andrew H. (referee)
This dissertation thesis is a summary of five studies published in peer- reviewed, impacted scientific journals. All of the publications are taxonomic revisions of previously unknown or little known collections of fossil cephalopods from the Early Paleozoic strata of Bohemia, Estonia and Sweden. Paleogeogra- phical and stratigraphical distributions of the respective taxa were summarized, refined and compared with contemporary fossil assemblages known from other regions. Implications on the paleoecology of the cephalopods and original envi- ronmental conditions were made. The text of the thesis is divided into three main parts. In the first part, the morphology of cephalopods is explained, stressing out the most important diagnostic characters used for their descriptions. The current systematics of the Cephalopoda is overviewed and the main cephalopod groups during the Ordovician are briefly introduced. The second part of the thesis describes the geological development and settings of the regions, from which the studied fossil cephalopods originate. The third and final part of the thesis provides a discussion and interpretation of the results of the published studies in the context of the previously published research. The genus Bactroceras Holm, 1898 and some members of the order Litui- tida were studied...
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Graptolites of the Šárka Formation (Middle Ordovician, Prague Basin) and their stratigraphical significance
Strossová, Zuzana ; Kraft, Petr (advisor) ; Bruthansová, Jana (referee)
Graptolites are one of the significant groups of stratigraphic index fossils in the Early Palaeozoic. They are used to determine the boundaries between bio- and chronostratigraphical units and to correlate them both on a regional and the global scale. The Šárka Formation, the Middle Ordovician lithostratigraphical unit of the Prague Basin (Teplá-Barrandian Unit), has yielded well-preserved and intensively studied graptolite fauna. Since the first studies carried out more than 100 years ago, much new facts and data has been gathered. They influenced a development and principal changes of the graptolite taxonomy and stratigraphy. Many key specimens were collected during the explorations of iron ore deposits in the vicinities of Rokycany, Ejpovice and Krušná hora Hill. This thesis summarises recent knowledge on graptolites from the Šárka Formation and its utilization in the stratigraphy. Key words: graptolites, Ordovician, Šárka Formation, stratigraphy
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Taxonomy, ecology and palaeogeographical significance of the genus Euorthisima (Brachiopoda) in the Prague Basin
Bartošová, Kateřina ; Mergl, Michal (advisor) ; Sklenář, Jan (referee)
Taxonomic position of the brachiopod genus Euorthisina HAVLÍ EK 1950 from the Ordovician of the Prague Basin (Czech republic) was subjected to wide discussions and disputes in the past. The genus was first classified within the superfamily Syntrophiiacea (order Pentamerida). Later, a separate family Euorthisinidae by Havlí ek (1977) was defined. At present, the family is assigned to the order Orthida and includes genera Euorthisina HAVLÍ EK, 1950, Lesserorthis BENEDETTO, 2007, Notorthisina HAVLÍ EK & BRANISA, 1980 and Protorthisina BENEDETTO, 2007. In this thesis, a revision of genus Euorthisina HAVLÍ EK 1950 with emphasis on taxonomic classification, palaeoecology and palaeogeographic occurrence of species E. moesta and E. minor described from the Ordovician of the Prague Basin has been made. Klí ová slova: Euorthisina, brachiopoda, Ordovician, Prague Basin, Czech republic.
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SCF in Lower Palaeozoic sediments of the Barrandian area
Kovář, Vojtěch ; Fatka, Oldřich (advisor) ; Brocke, Rainer (referee)
1 Abstract In recent years, the term small carbonaceous fossils (SCFs) has been established to accomodate fragile organic-walled fossils of micro- to mesoscopic size that are usually extracted by means of the 'low-manipulation HF extraction' method. This method has so far only been utilized by several authors and no reports have been published on the usage of the method on samples from the Barrandian area. To test the applicability of the method, samples from the Barrandian area were processed. The samples came from eleven localities representing six stratigraphic units (Paseky Shale, Jince Formation, Letná Formation, Kosov Formation, Daleje Shale and Roblín Member). All the units have been studied before by 'standard' methods of palynological processing. Various previously unreported fossils are described, including wiwaxiid sclerites, putative chaetognath remains and acritarch clusters. Furthermore, it is discovered, that the 'low-manipulation HF extraction' can also be used for extraction of originally calcareous fossils. The pilot study provides a further proof that the 'low-manipulation HF extraction' is a useful tool with the potential to significantly expand our knowledge of fossil assemblages. Key words: Small carbonaceous fossils, Cambrian, Ordovician, Devonian, Barrandian area
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Irone ores from the Krušná hora (hill)
Nič, Martin ; Marek, Jaroslav (advisor) ; Čáp, Pavel (referee)
Krušná Hora near Nový Jáchymov belongs in Barrandian area to one of the most important localities with the occurrence of Ordovician sedimentary iron ores. Rich reserves of iron ore and easy access to this area was known and used since many centuries ago. Use of deposits laid the foundation for the rich history of mining and metallurgy in Křivoklátsko. The work is divided into two thematic parts. The geological section is devoted to the construction of tectonic bearings, its stratigraphy, mineralogy, petrology, lithology and paleontological finds. Briefly describes the development of this sedimentation area. Self-described history of the geological survey. The history of the use of bearings is described in the second part, which is divided according to individual companies engaged in mining there. Particular attention is paid especially to companies conducting mining during the 20th century. Self-described termination of mining and mine disposal. Attention is paid to the technical equipment of the mine and the current state of the remains of the mining activities.
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Review of phyllocarid crustacenas of the Barrandian area
Šilinger, Matěj ; Fatka, Oldřich (advisor) ; Budil, Petr (referee)
The thesis summarizes the actual knowledge about classification and stratigraphic distribution of phyllocarid crustaceans in Ordovician to Devonian sediments of the Barrandian area. The thesis includes revision of systematic position and classification of individual taxa, mainly on the basis of data and observations published outside of the Czech Republic. The photographic documentation of selected specimens housed in institutional collections is newly provided.
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Semiquantitative study of the fossil association of the Dobrotivá Formation (Ordovician, Prague Basin) in Ejpovice
Luptáková, Monika ; Kraft, Petr (advisor) ; Mergl, Michal (referee)
The master thesis is focused on the semiquantitative study of the fossil association of the stratigraphically lowest layer No. 3 from the channel sample from the Ejpovice locality, where in the southern bank of the flooded quarry, the Dobrotivá Formation of the Ordovician of the Prague Basin is exposed in the thickness of several meters. The thesis briefly summarizes basic knowledge about the fossil associations of the Dobrotivá Formation, its lithology, stratigraphy and previous paleontological research at studied locality. Paleoecology of the fauna recorded in studied material is described. The main part of the thesis is focused on the taphonomy and associations of the fossils recorded in studied material. In the final part of the thesis, the overall fossil association is characterized depending on the paleoecology and taphonomy of preserved fossils, and the model of the paleoenvironment at the Ejpovice locality is discussed. Based on the lithology and studied fossil associations, it is assumed that a dysoxic environment with episodic currents prevailed in the Ejpovice locality. The fauna is species-depleted and taxa typical of the Dobrotivá Formation are rare. The fauna is mainly allochtonous and most of the organisms are considered as postmortal accumulations in this study. Key words:...
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