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Foraminifera like paleoecological and biostratigraphical markers
Scheiner, Filip ; Holcová, Katarína (advisor) ; Kopecká, Jitka (referee)
The thesis deals with classification of foraminifera and development of foraminifera systematics in time. It also provides an complex overview of foraminifera biology, which includes cell biology, feeding, growth and life cycle of foraminifera. Next chapter describes morphological characteristics of foraminiferal test as the most important feature for taxonomy in paleontology. The following part presents basic factors and aspects of ecology. Practical part describes micropaleontological analysis of borehole Hrušovany located in SE part of the Central Paratethys. The foraminiferal assemblage allowed correlation with the Early Badenian (Langhian) and reconstruct paleoenvironment in this part of basin. Key words: foraminifera, taxonomy, Central Paratethys, Langhian, paleoecology
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Jurrasic calcareous nannoplankton from the northern Bohemia
Martincová, Anna ; Holcová, Katarína (advisor) ; Hrbek, Jan (referee)
Bachelor thesis summarizes the current knowledge of the Jurassic calcareous nanoplankton in relation to areas of northern Bohemia as a literary review. Work chracterize calcareous nannofossil in term of life cycle, ecology and points to its considerable importance for biostratigraphy. Work also describes the Jurassic sediments of the Bohemian Massif and the development of communities in the Jurassic calcareous nannofossils. Part of this work is a summary of the Jurassic expansion of calcareous nannofossils in Europe and creation of his survey through a table. The work also suggests the possibility of using calcareous nannofossils for specification biostratigraphy of northern Bohemia.
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Cephalopods and biostratigraphy of North Bohemian Jurassic sediments
Hrbek, Jan ; Košťák, Martin (advisor) ; Ziegler, Václav (referee)
The Jurassic ammonites from the Northern Bohemia has been revised on the base of the material stored in the National Museum in Prague and the Faculty of Science, Charles University in Prague. 23 species and 19 genera, belonging to 7 families were described on the basis of this systematical revision. This ammonite assemblage indicates a proportional occurence of the Boreal, Tethyan and also cosmopolitan taxa. Stratigraphically important taxa suggest a considerably longer period of sedimentation, predominantly represented by the Upper Jurassic carbonates. This interval may contain up to 9 ammonite zones. A pilot microfacial analysis of carbonates from Peškova stráň area (in Krásná Lípa vicinity) indicates a considerably higher variability of sedimentation area. The presence of micritic carbonates suggests the existence of a widespread areas in the Late Jurassic sea covering the Bohemian Massif. The biostratigraphy and palaeogeography is briefly discussed in the European Late Jurassic context. Key words: ammonites, Upper Jurassic, Northern Bohemia, carbonate sediments, biostratigraphy, palaeogeography
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Upper Turonian and lower Coniacian calcareous nannoplankton stratigraphy in the borehole V 800 Střeleč, Bohemian Cretaceous Basin
Svobodová, Andrea ; Švábenická, Lilian (advisor) ; Ozdínová, Silvia (referee)
Upper Turonian and Lower Coniacian calcareous nannoplankton stratigraphy in the borehole V 800 Střeleč, Bohemian Cretaceous Basin Number of biostratigraphic studies has been performed within the Upper Cretaceous platform sediments of the NW Europe, however, the problem of Turonian-Coniacan boundary has not yet been satisfactorily resolved using available methods in the field of micropaleontology. The proposed thesis has described the species composition of calcareous nannoplankton assemblages in the Bohemian Cretaceous Basin, across the Upper Turonian- Lower Coniacian interval, focusing on the stratigraphically and paleoecologically important species. Seventy-three taxa of calcareous nannofossils in the studied material have been determined and signifiant species have been discussed (Marthasterites furcatus, Kamptnerius magnificus, Lucianorhabdus sp., Braarudosphaera sp., Nannoconus sp., Watznaueria barnesae, Uniplanarius gothicus, Quadrum gartneri, Thoracosphaera operculata). For purposes of this thesis, a suitable material from the V 800 Střeleč borehole, one of the key cretaceous profil in the Český ráj area, was obtained.
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Cretaceous Radiolaria from the Březno section
Müllerová, Petra ; Holcová, Katarína (advisor) ; Vajskebrová, Markéta (referee)
The presented thesis is focused on the Radiolaria of the Czech Cretaceous Basin. The studied material was collected in Březno u Loun and in the Úpohlavy quarry. Biology, ecology and morphology, as well as systematics of the whole group is discussed. An important part of this thesis constitutes of the geological settings of Cretaceous, Czech Cretaceous Basin and both localities. 26 samples from Březno and 24 samples from the Úpohlavy quarry have been studied using several methods with the aim to obtain most numerous and best preserved communities possible. Despite poor preservation of the shells, 9 species have been identified. Several shells have been assigned at least to the genus or order levels. Species of Dictyomitra communis (Squinabol, 1904), Dictyomitra cf. napaensis Pessagno, 1976, Turbocapsula cf. giennensis O'Dogherty, 1994, Novixitus cf. mclaughlini Pessagno, 1977, Stichomitra cf. stocki (Campbell & Clark, 1944), Stichomitra communis Squinabol, 1903, Stichomitra japonica (Nakaseko & Nishimura), in Nakaseko et. al., 1979, Holocryptocanium barbui Dumitrica, 1970, cf. Pseudoaulophacus pargueraensis Pessagno, 1963 and genera of Orbiculiforma, Stichomitra, cf. Cryptamphorella have been reported in the Czech Cretaceous Basin for the first time.
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