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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Svrchnokarbonská zkřemenělá dřeva západní části kladensko-rakovnické pánve / Late Carboniferous silicified wood from the western part of the Kladno-Rakovnik Basin

Holeček, Jakub January 2011 (has links)
Kladno-Rakovník Basin and especially its western part is well known for its abundant silicified wood, so-called as "araukarity". The occurrence of these fossils is described since the 19th century, however, modern systematic classification is lacking. Araukarity, linked mainly to the Týnec and Líně Formations, are found almost exclusively on the fields, therefore it was difficult to implement any detailed sedimentological conclusions. The Master Thesis is focused on the western part of the Kladno-Rakovník Basin, where large amount of material was discovered. After a detailed xylotomical study of thin sections and polished cross sections, two different types of wood were discerned. First related to the coniferous and cordaite wood, attributable to the of the morphogenus Araucarioxylon and the second one, rather rare and unknown in the western part of the Kladno-Rakovník Basin represents a calamite wood and it is assigned to the morphogenus Arthropitys. I was able to partially confirm Skoček's (1970) theory, that so-called black araukarity are linked to the grey (Kladno and Slaný) formations.
2

Morfologie a taxonomie nově objevených zástupců skupiny Megasecoptera ze svrchního karbonu severní Číny (Insecta: Palaeodictyopteroida) / Megasecoptera: morphology and taxonomy of newly discovered specimens from Upper Carboniferous of northern China (Insecta: Palaeodictyopteroida)

Pecharová, Martina January 2013 (has links)
The extinct insect group of Palaeodictyopteroida (Insecta: Palaeoptera) comprised mainly phytophagous species and occurred from Upper Carboniferous to Upper Permian. Megasecoptera is one of several orders of belonging to this group. Although, the order Megasecoptera comprised over 20 described families, morphology of some body structures are insufficiently studied. The present thesis deals with evaluation of new material comprising the extensive set of 76 fossil insect specimens from the Upper Carboniferous (Bashkirian) of northern China. The fossils having excellent state of preservation of the wings and other body structures provide new insights concerning the external morphology of Megasecoptera. All studied specimens were attributed based on wing venation pattern into two known megasecopteran genera within families Brodiopteridae and Sphecopteridae. The aim of the present thesis is examine the morphology and variability of wing venation of two newly proposed species Brodioptera sp. n. and Cyclocelis sp. n. from site in northern China. In addition the following methods of geometric morphometrics based on landmarks were used for comparison of venational characters: a comparison of centroid size, procrustes analysis, principal component analysis and thin plate spline. Variability of wing venation...
3

Morfologie křídelní nervatury larválních stádií Palaeodictyoptera ze svrchního karbonu Polska / Palaeodictyoptera: morphology of immature wings from the Upper Carboniferous of Poland

Tippeltová, Zuzana January 2013 (has links)
Insect wings are very specific and unique structures in animal kingdom. Wing morphology is a result of long-standing complicated evolutionary process and until recently the way how the wings have evolved is not completely clarified. The flight ability is one of the most important event in insect history because it allows them to exploit new habitats, escape from predators or find the sexual partner. Here we present the newly discovered material consisting of Palaeodictyoptera immature wings from the Upper Carboniferous (Westphalian A) of Poland. This order became extinct in the end of Permian, however during the Late Paleozoic was remarkably diversified. Until recently, number of adult palaeodictyopterans have been described, however the immature stages are relatively unknown due to lack of suitable fossils. Immature wings present in this thesis have undoubtedly palaeodictyopterous affinities with atribution within superfamilies Breyeroidea and Homoiopteroidea. However, their familial assignment into Breyeriidae (morphotype A) and Homiopteridae (morphotype B) based on fore wing venation characters is not definite because of wing venation limits in early ontogenetic stages. The aim of the present work is a complex description of 14 new palaeodictyopteriids immature wings, and to point out certain important...
4

ROTEIRO GEOLÓGICO NOS MUNICÍPIOS DE CASTRO E TIBAGI, PR – BRASIL.

Matsumura, Willian Mikio Kurita 19 April 2010 (has links)
Made available in DSpace on 2017-07-21T18:13:42Z (GMT). No. of bitstreams: 1 Introducao.pdf: 3135387 bytes, checksum: 9e349e21896905091b64a491c6e94325 (MD5) Previous issue date: 2010-04-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The Campos Gerais region, Paraná, Brazil, holds unique geological, geomorphological e paleontological sets, which are target of numerous works and scientific researcher. This research present a geological and paleontological route using the outcrops occurring along existing roads in the municipalities of Castro and Tibagi, Parana State, Brazil. This roadmap is proposed as a tool to aid teaching and scientific support for fieldworks (classes or applied basic research) developed by teachers and researchers. Fieldwork carried out aimed to the regional recognition and description of stratigraphic sections of the surface, according to the geological context of the Castro and Paraná basins. For each outcrop were built columnar sections showing the following items: 1) lithological description, 2) sedimentary structures and 3) fossil content occurring. All outcrops were correlated with stratigraphic frameworks pre-existing. A total of 20 raised and described outcrops then organized in the form of stopping points along the road PR- 151, PR-340, BR-153 and secondary roads. Stratigraphically the roadmap begins in the volcanic and volcaniclastic rocks Ordovician of Castro Basin. Then cover the glacial rocks of Neo-Ordovician from Iapó Formation and the fluvial-marine rocks Siluro- Devonian from Formation Furnas, and pelitic rocks of the Devonian from Ponta Grossa Formation, ending with the glaciogenic rocks Neo-Carboniferous from Itararé Group (belonging to the Paraná Basin). This roadmap allows the monitoring of succession lithological, stratigraphic, sedimentological and paleobiological in the interval Lower Ordovician and Upper Carboniferous in the Campos Gerais region of Paraná, facilitating public access to new target areas of outcrops and providing a history of research and discoveries each point.. / A região fisiográfica dos Campos Gerais do Paraná é detentora de um conjunto singular de feições geológicas, geomorfológicas e paleontológicas que são alvos de inúmeros trabalhos e pesquisas científicas. Apresenta-se aqui um roteiro geológico e paleontológico utilizando-se de afloramentos rochosos ocorrentes ao longo de rodovias existentes nos municípios de Castro e Tibagi, Estado do Paraná, Brasil. Este roteiro é proposto como um instrumento de auxílio didático e apoio científico para atividades práticas de campo (aulas ou pesquisa básica aplicada) desenvolvidas por professores e pesquisadores. Trabalhos de campo realizados objetivaram o reconhecimento regional e a descrição das seções estratigráficas de superfície, segundo o contexto geológico das bacias de Castro e do Paraná. Para cada afloramento foram construídas seções colunares apresentando os seguintes ítens: 1) descrição litológica, 2) estruturas sedimentares e 3) conteúdo fossilífero ocorrente. Todos os afloramentos foram correlacionados a arcabouços estratigráficos pré-existentes. No total foram levantados e descritos 20 afloramentos rochosos organizados então sob a forma de pontos de parada ao longo das rodovias PR-151, PR-340, BR-153 e estradas secundárias. Estratigraficamente inicia-se nas rochas vulcânicas e vulcanoclásticas ordovicianas da Bacia de Castro. Em seguida abrange as rochas glaciais neo-ordovicianas da Formação Iapó e as rochas flúviomarinhas siluro-devonianas da Formação Furnas e pelíticas devonianas da Formação Ponta Grossa, encerrando com as rochas glaciogênicas neo-carboníderas do Grupo Itararé (pertencentes à Bacia do Paraná). O presente roteiro permite o acompanhamento das sucessões litológicas, estratigráficas, sedimentológicas e paleobiológicas no intervalo Ordoviciano Inferior e o Carbonífero Superior na região dos Campos Gerais do Paraná, facilitando o acesso do público alvo a novas regiões de afloramentos e fornecendo um histórico das pesquisas e descobertas de cada ponto.
5

Der Thüringer Wald im Zeitraum der Stefan-Unterperm-Entwicklung - ein Abschnitt der Zentraleuropäischen N-S-Riftzone innerhalb des Mitteleuropäischen Großschollenscharniers

Andreas, Dieter 11 December 2013 (has links) (PDF)
Die einer unterschiedlichen Genese zuordenbaren tektonischen Strukturen, welche sich im Raum des Thüringer Waldes bündeln, formten in einem gerichteten Entwicklungsablauf das komplizierteste und vielseitigste hochoberkarbonisch-unterpermische Strukturgebäude Mitteleuropas. In dieser Arbeit wird der Versuch einer Synthese der strukturellen und der daran geknüpften vulkanogen-sedimentären Entwicklung innerhalb der permokarbonischen Thüringer Wald-Senke und ihres unmittelbaren mitteleuropäischen Umfeldes unternommen. Sie stützt sich dabei maßgeblich auf die Ergebnisse langfristig durchgeführter Kartierungsarbeiten, die in diskontinuierlichen Bearbeitungsphasen seit 1957 bis in die 90er Jahre des vergangenen Jahrhunderts erfolgten. Einbezogen werden die Ergebnisse von insgesamt 54 Forschungs- und Erkundungsbohrungen, die zu einem Großteil im Kontext dieser Arbeiten geteuft worden sind. 36 Bohrprofile werden hier erstmals vollständig beschrieben und publiziert. Neben einer nochmaligen Überprüfung der gesamten lithostratigraphischen Abfolge in der permokarbonischen Thüringer Wald-Senke besteht die Zielstellung der Arbeit in deren Einbindung in die regionale mitteleuropäische strukturelle Entwicklung während dieser Zeitspanne, beginnend bei den potenziellen variszisch-kollisional angelegten Wurzeln der permokarbonischen Strukturen, über ihre weitere tektono-magmatische Ausgestaltung bis hin zur Ausprägung der postvariszischen Großschollenfelderung Mitteleuropas am Ende des Permokarbons.
6

Der Thüringer Wald im Zeitraum der Stefan-Unterperm-Entwicklung - ein Abschnitt der Zentraleuropäischen N-S-Riftzone innerhalb des Mitteleuropäischen Großschollenscharniers

Andreas, Dieter 26 July 2013 (has links)
Die einer unterschiedlichen Genese zuordenbaren tektonischen Strukturen, welche sich im Raum des Thüringer Waldes bündeln, formten in einem gerichteten Entwicklungsablauf das komplizierteste und vielseitigste hochoberkarbonisch-unterpermische Strukturgebäude Mitteleuropas. In dieser Arbeit wird der Versuch einer Synthese der strukturellen und der daran geknüpften vulkanogen-sedimentären Entwicklung innerhalb der permokarbonischen Thüringer Wald-Senke und ihres unmittelbaren mitteleuropäischen Umfeldes unternommen. Sie stützt sich dabei maßgeblich auf die Ergebnisse langfristig durchgeführter Kartierungsarbeiten, die in diskontinuierlichen Bearbeitungsphasen seit 1957 bis in die 90er Jahre des vergangenen Jahrhunderts erfolgten. Einbezogen werden die Ergebnisse von insgesamt 54 Forschungs- und Erkundungsbohrungen, die zu einem Großteil im Kontext dieser Arbeiten geteuft worden sind. 36 Bohrprofile werden hier erstmals vollständig beschrieben und publiziert. Neben einer nochmaligen Überprüfung der gesamten lithostratigraphischen Abfolge in der permokarbonischen Thüringer Wald-Senke besteht die Zielstellung der Arbeit in deren Einbindung in die regionale mitteleuropäische strukturelle Entwicklung während dieser Zeitspanne, beginnend bei den potenziellen variszisch-kollisional angelegten Wurzeln der permokarbonischen Strukturen, über ihre weitere tektono-magmatische Ausgestaltung bis hin zur Ausprägung der postvariszischen Großschollenfelderung Mitteleuropas am Ende des Permokarbons.

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