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Radiolaria of the Bohemian Cretaceous Basin
Müllerová, Petra ; Vajskebrová, Markéta (referee) ; Holcová, Katarína (advisor)
The first part of work deals with cell structure, shell morphology, reproduction and nutrition. Also the ecology and systematical subdivision of radiolarians are described here. The systematical subdivision depends on differences in shell morphology of individual forms. The next part is devoted to Cretaceous radiolarians with focus on Cenomanian and Turonian ones, also some examples from several locations around the world is located here. The last part of this work deals with geology of Bohemian Cretaceous Basin, where the study of radiolarians from certain site will continue in master thesis.
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Foraminifera of the Bohemian Cretaceous Basin
Hašková, Barbora ; Frank, Jiří (referee) ; Holcová, Katarína (advisor)
The thesis deals in the compilation part with systematic classification, biology, morphology of the test, ecology and palaeoecology of the Foraminifera. Next research focuses on the history of Cretaceous Foraminifera in our area and the geology of the Bohemian Cretaceous Basin, focusing on Úpohlavy site in the northwestern part of the Bohemian Cretaceous Basin. Three samples from Úpohlavy section were preliminary micropaleontologically analysed. Plankton / bentos ratio was counted. Genus Heterohelix and Planoheterohelix was described and taxonomically studied. Keywords: Upper Cretaceous, Bohemian Cretaceous Basin, Foraminifera, Heterohelix 1
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North Bohemian coal basin, its former, present and future situation
Knotek, Martin ; Slavíková, Lenka (advisor) ; Petrášek, František (referee)
The aim of the dissertation is to outline the possible solutions to energetic situation connected with the Czech environment policy for the area of North Bohemian coal basin. An effort to refer to former and present power situation, its impacts on this area (e.g. employment) and its alternative facilities, which influence political decisions. The dissertation tries to answer to question, if there are nowadays sufficient fields for negotiations among the coal companies, communities, ČEZ and government. The piece is focus on problem of proprietary rights, expropriation of subjects, theirs remuneration and deals with government decisions. I'll try to analyse the situation during negotiation on the part of loser and winner to the extent of regional and national.
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New achievements in sedimentary geology of the western part of the Bohemian Cretaceous Basin
Uličný, David ; Laurin, Jiří
Since the Late Cenomanian time the shallow seaway of the Bohemian Cretaceous Basin facilitated water-mass transfer across the nortehn part of the Bohemian massif. Marine currents flowing along the seawaz axis strongly influenced the deltaic deposition at basin margins. We interpret the narrowing of the seaway between the Czech and Saxonian parts of the basin as the main cause of vigorous tidal circulation. Acceleration of tidal currents in this region is reproduced also by numerical modelling of tidal circulation performed at the Imperial College (London) on the basis of our data.
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Paleomagnetism and magnetomineralogy of rocks from the Bohemian Massif and Tethyan Realm
Schnabl, Petr ; Pruner, Petr (advisor) ; Hrouda, František (referee) ; Petrovský, Eduard (referee)
Mgr. Petr Schnabl - Dissertation Paleomagnetism and magnetomineralogy of rocks from the Bohemian Massif and Tethyan Realm Abstract The thesis deals with paleomagnetic and rock magnetic properties of Silurian/Devonian and Jurassic/Cretaceous limestones, Paleogene/Neogene basaltic rocks and altered Silurian basalts. The main goal is to determine the history of the Earths' magnetic field from the Silurian to the present. Two lithostratigraphic formations are defined in the Jičín volcanic field on the basis of volcanology, paleomagnetism and radiometric dating. The Trosky Formation (24.6?/18.3 - 15.7 Ma) is composed of several Strombolian-type volcanoes, while the Kozákov Formation (5.2 - 4.6 Ma) is represented by effusive products with a crater vent of a single giant volcano. One Pliocene (4.3-3.3 Ma) and two Pleistocene phases (2.6 -2.1 Ma and 1.8 - 1.1 Ma) of volcanic activity Magnetostratigraphy is a very important tool for the definition of the J/K boundary. The boundary between the Crassicolaria and Calpionella zones is present within geopolarity zone M19n. The boundary between the ammonite zones Jacobi and Durangites also lies close to this point. Paleomagnetic directions of Silurian and Devonian rocks in the Bohemian Massif are very difficult to interpret and have been studied as a challenging problem...
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Runoff Changes in the Šumava/Bohemian Forest Region
Fiala, Ondřej ; Kliment, Zdeněk (advisor) ; Královec, Václav (referee)
RUNOFF CHANGES IN THE ŠUMAVA / BOHEMIAN FOREST REGION Abstract: The goal of this thesis is to the evaluation of possible causes of changes in runoff regime in the Šumava region from time and spacial point of view. The thesis includes research and applied part. The research part is dedicated to methods of evaluation of runoff changes and their possible causes in teh Šumava region such as anthropogenic factors (changes in the river network, dams, drainage, land - use changes), natural factors (climate changes, peatbogs influence) and disturbances (wind calamities and bark beetle outbreaks, floods). In the applied part there is an analysis of precipitaion - runoff regime for long-term time series of average annual, monthly and minimal daily discharges and monthly precipitations for selected gauging stations in upper Otava, Ostružná, Volyňka, upper Blanice and Teplá Vltava basins using simple and double mass curves and Mann - Kendall test. In conclusion the achieved results were evaluated, discussed and compared with subject publications. Key words: disturbance, Mann - Kendall test, runoff, discharge, mass curves, precipitation, Šumava, changes
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Possibilities of Karstification in the Transitional Facies of the Bohemian Cretatious Basin
Balák, František ; Bruthans, Jiří (advisor) ; Knížek, Martin (referee)
In the region of Bohemian Cretaceous Basin can be found some springs with specific yield over 100 l/s. The doyen of Czech hydrogeology Prof. Hynie described some of those springs to be of karst origin and as the most permeable area he described the so-called transitional facies between shallow-water sandstones and deep-water marlstones. Possibilities of karstification have not yet been studied for rocks in the BCB, so the origin of well-permeable pathways in the BCB is a subject of speculations. This thesis deals with the question of which sedimentary rocks potentially allow the generation of karst permeability in the BCB. To do so, rock samples drilled from outcrops in the BCB were subjected to a fast dissolution simulation by leaching in hydrochloric acid. Carbonate content is measured by a standard and one's own method. Mineral composition, grain size and microscopic structure of rocks are studied with SEM. As is shown, the border of rock karstification is not defined just by the carbonate content, but also the grain size, rock structure and by the occurrence of fine secondary silicate content. Concerning the amount of dissolvable compounds, the border of total disintegration can be at 30 % of carbonate content for some rocks, but the most resistant rocks (mostly fine rocks with SiO2 matrix) stay intact...
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The study of nest predation of reed warbler (Acrocephalus scirpaceus) using artificial nests
ROHELOVÁ, Markéta
The aim of this thesis was to find out the extent of the predation of the Eurasian Reed Warbler (Acrocephalus scirpaceus) during the laying period in the South Bohemian Region. The survey was done by means of artificial nests containing fake eggs. Additional goal of the thesis was to evaluate the factors that can influence the predation according to measured nest parameters, such as the distance of the artificial nest from free water surface, the depth of water below the nest and the distance from the nearest tree.
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