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Lower Cretaceous belemnites of the locality Štramberk: taxonomy, stratigraphy, palaeoecology, palaeobiogeography
Vaňková, Lucie ; Košťák, Martin (advisor) ; Vašíček, Zdeněk (referee)
The study (MS, diploma thesis) is based on more than 1200 belemnite rostra set from the Lower Cretaceous sediments of locality Štramberk (N Moravia). Investigated rostra come from the collection of Dr. V. Houša, who collected them during the seventies to eighties of the last century, during intensive excavation of the Lower Cretaceous tectonic block named Š-12 "pocket". Belemnite rostra were determined at species and generic levels including 7 species and 18 genera. The majority of belemnite assemblage comes from the Lower Valanginian strata, however, also the Tithonian, Berriasian and Hauterivian taxa are present, what clearly documents the redeposition. The presence of mesohibilitids, known from the Barremian and younger deposits, still remains enigmatic. For better understanding of the redeposition proces, the alveolar infill formed by several generations of sediments, are investigated. Study of these sediments outlines the sedimentary development of the Baška elevation inside the Outer Carpathian system. Preliminary stable isotope data δ18 O and δ13 C received from belemnite rostra show different belemnite life-style during the ontogeny - i.e. juvenile bottom life style and adults inhabiting shallow/warmer waters. Negative values of δ18 O should be correlated with the "Valanginian extinction...
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Lower Cretaceous belemnites and their occurrence in Czech Republic
Vaňková, Lucie ; Košťák, Martin (advisor) ; Marek, Jaroslav (referee)
The thesis deals with an complex overview of the Lower Cretaceous belemnites, and their occurrence in the Czech Republic, especially in Štramberk locality. First part provides a brief introduction to the Lower Cretaceous and to belemnite morfology with emphasis on internal skeleton especially of rostrum. Next chapter includes short review of morfometric analysis, which is the most important feature for taxonomy. The following part presents systematics and taxonomy of the Lower Cretaceous belemnite, and their paleoecological use as an indicators for paleotemperatures. There are also mentioned geographical occurrences and migrations of certain belemnite taxa and their stratigraphical evidence in the Lower Cretaceous sediments. The last part deals with the locality Štramberk, which is unique in the Czech Republic because of its stratigraphical evidence of the Lower Cretaceous belemnite fauna. Key words: Belemnites, Lower Cretaceous, systematice, palaeobiogeography, palaeoecology, Štramberk
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Latest Ludlow chitinozoans from the Prague Basin: significanec for correlations and succession during Kozlowskii/Lau extinction events
Vodička, Jakub ; Fatka, Oldřich (advisor) ; Štorch, Petr (referee)
Two sections, Všeradice and Kosov, represent continuous sedimentary succession situated in the Prague Basin. No detailed research on stratigraphical level equal the N. kozlowskii graptolite zone focusing on chitinozoans, has not yet been conducted in the Prague Basin and is also very scarce globally. Limestone beds, examined for chitinozoans, were not very productive. Chitinozoan reaction on extinction is visible, if we compile data from both sections. The pre-extinct chitinozoan fauna is characterized by the Conochitinidae family. Samples from the post-extinct interval contained no chitinozoas. The interval of fauna recovery is characterized mainly by the Eisenackitina genera. In this interval, global zone for the uppermost Ludfordian, represented by E. barrandei, can be confirmed. In agreement with all the published literature, we have not found E. philipi, index taxa of the former global zone in the Prague Basin. E. lagenomorpha appears stratigraphically only slightly below E. barrandei and therefore it cannot substitute E. philipi, as it is used in Baltika region. chitinozoa, Prague Basin, Kozlowskii, Lau, extinction, Ludfordian, stratigraphy
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Okrouhlík. Excavation of Mesolithic settlement area in the Kamenice river canyon
Svoboda, Jiří ; Hajnalová, M. ; Horáček, I. ; Novák, Martin ; Přichystal, A. ; Šajnerová, A.
This paper introduces a group of newly discovered Mesolithic rockshelter sites, clustered at the confluence of two rocky canyons in the sandstone region of North Bohemia, Czech Republic (Dolský Mlýn, Šamanská rokle, Prasečí převis, Ferdinandova soutěska, Kostelní rokle). The Okrouhlík rockshelter, representative of the Early Mesolithic stage, was excavated almost completely, demonstrating internal within-site patterning: a central hearth, system of surrounding kettle-shaped pits, and two large, stone-filled, marginally located hearths. Analyses of the environmental data, fauna, and raw material, typological and use-wear analyses of lithic artifacts are included.
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Research of the Early-Medieval Basilica of St. Lawrence in Vyšehrad
Nechvátal, Bořivoj
The Basilica St. Lawrence lies on the border oj the princely and royal acropolis and the east front section of the castle. Its long-term research started in 1884 when early-medieval tiles were discovered in the baroque residence no. 14 which makes up a part of the basilica. In 1903 archaeologists led by B. Matějka disclosed foundations of a basilica with an inserted transept. The building was dated to the 11 th-12th centuries and after the end of the excavations the site was filled up. The basilica was excavated again in 1924-1926 during archaeological research of K. Guth. A concrete slab was then placed over it and the site has remained open ever since. The third phase of the research was camed out in 1968-1970 when stratigraphic positioning oJthe tiles was determined. The dating was specified to the late 11th century, to the period when Vyšehrad was the seat of the first Czech king Vratislav II (1061-1092).
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