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Dissertations / Theses on the topic 'Permian'

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Published: 4 June 2021

Last updated: 25 July 2025

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1

Tognoli, Francisco Manoel Wohnrath [UNESP]. "Estratigrafia das seqüências deposicionais do grupo Guatá, borda leste da Bacia do Paraná." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/102978.

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Made available in DSpace on 2014-06-11T19:32:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-01Bitstream added on 2014-06-13T18:43:38Z : No. of bitstreams: 1 tognoli_fmw_dr_rcla.pdf: 2467393 bytes, checksum: 266c2198d33d01d70f88787843e67770 (MD5)<br>Agência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP)<br>O Grupo Guatá foi alvo de um estudo detalhado ao longo de toda a borda leste da Bacia do Paraná. Por meio da análise e descrição seqüencial de testemunhos e integração com dados de perfis, aproximadamente 100 poços foram analisados desde o norte do Estado do Paraná

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2

Faria, Rafael Souza de 1985. "Lenhos fósseis das formações Irati e Teresina no estado de São Paulo : novos dados." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287308.

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Orientador: Fresia Soledad Ricardi Branco<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociências<br>Made available in DSpace on 2018-08-23T03:28:59Z (GMT). No. of bitstreams: 1 Faria_RafaelSouzade_D.pdf: 6101775 bytes, checksum: 31b791a8495ac24c1ebca52267bb2787 (MD5) Previous issue date: 2013<br>Resumo: A típica Flora de Glossopteris, que caracteriza o registro paleobotânico do Permiano da Bacia do Paraná possui como um importante componente os lenhos fósseis coniferóides. Aqui foram tomadas sete localidades do estado de São Paulo, de afloramentos da Formação Irati

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3

Pablo, Buenafama Aleman. "Acoustic impedance inversion of the Lower Permian carbonate buildups in the Permian Basin, Texas." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/1068.

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Carbonate reservoirs are usually diffcult to map and identify in seismic sections due to their complex structure, lithology and diagenetic frabrics. The Midland Basin, located in the Permian Basin of West Texas, is an excellent example of these complex carbonate structures. In order to obtain a better characterization and imaging of the carbonate buildups, an acoustic impedance inversion is proposed here. The resolution of the acoustic impedance is the same as the input seismic data, which is greatly improved with the addition of the low frequency content extracted from well data. From the bro

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4

Glasspool, Ian James. "The palaeoecology of a South African Early Permian, and a Late Permian Australian, Gondwana coal." Thesis, Royal Holloway, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325691.

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5

Zazzali, Sindbad. "Paléobiodiversité des ostracodes à la limite Permien moyen - Permien supérieur." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066111/document.

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Les ostracodes, microcrustacés (Arthropoda), sont relativement abondants dans les archives paléontologiques. Sensibles aux variations paléoenvironnementales, la composition des assemblages et leur diversité sont d’excellents marqueurs des changements qui affectent le benthos marin néritique. Leur diversité est connue pour être fortement affectée par la crise biologique marquant la limite Permien-Trias, mais leur histoire à la fin du Permien moyen reste peu documentée.Près de 10 Ma avant la limite Permien-Trias, à la fin du Permien moyen, un important épisode d’extinction intervient, préfiguran

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6

Laya-Pereira, Juan Carlos. "Permian carbonates in the Venezuelan Andes." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3378/.

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In northern South America, Upper Palaeozoic strata were deposited extensively over peri-cratonic areas associated with restricted seas located between Laurentia and Gondwana, in equatorial Pangea. In many places the successions are rarely exposed, and so are poorly documented; this is largely the result of extensive weathering and dense vegetation in the tropical Andes. However, these strata do contain significant information for palaeogeographic and palaeoclimatic reconstructions, and our understanding of the evolution of northern Gondwana and the finally assembly of Pangea. The main objectiv

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7

Bin, Leman Mohd Shafeea. "Permian productidina of Britain and Malaysia." Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6293/.

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The British Permian Productidina have not been revised in detail since 1858. In the present study some 2000 specimens from 29 localities in north east of England have been collected and prepared in the laboratory and used together with museum collections. The fauna consists of four species of Strophalosia, one new species of Eostrophalosia, six species of Heteralosia (four new), three species of Craspedalosia (one new), two species of Howseia, four species of Horridonia (one new) and two species of Spinohorridonia new genus. The Strophalosiacea and Horridoniinae are divided according to a new

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8

Morante, Richard. "Permian-Triassic stable isotope stratigraphy of Australia." Phd thesis, Australia : Macquarie University, 1996. http://hdl.handle.net/1959.14/47568.

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"September, 1995"<br>Thesis (Ph.D.) -- Macquarie University, School of Earth Sciences, 1996.<br>Bibliography: leaves 171-183.<br>Introduction -- Australian ð¹³Corg-isotope profiles about the Permian-Triassic (P/TR) boundary -- Strontium isotope seawater curve in the late Permian of Australia -- ð¹³Cco₃ AND ð¹⁸Oco₃ seawater profiles through the Permian-Triassic of Australasia -- Paleomagnetic stratigraphy about the Permian/Triassic boundary in Australia -- Synthesis.<br>The Permian-Triassic boundary mass extinction is the largest in the Phanerozoic and therefore is the major event in the Phaner

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9

Gay, Susan Anne. "A Dicynodont fauna from the Permian of Tanzania." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330250.

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10

Berry, Hunter D. "Dissolution of Permian Salt, Las Animas Arch, Colorado." Thesis, University of Louisiana at Lafayette, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=10931832.

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<p> The Colorado Cheyenne 3D seismic survey in this thesis project is located in Cheyenne and Kiowa counties in eastern Colorado and features the Las Animas Arch. The scope of this project aims to expand the understanding of the processes and products of salt weld development. Throughout the survey, lateral variability of the Nippewalla strata within the Permian section is observed in both seismic and well data and generally is a result of dissolution of the Blaine or the dissolution of the Cedar Hills. </p><p> In this project, structural and stratigraphic elements were seismically mapped an

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11

Gao, Zhifeng. "Lower Permian plants from Taiyuan, Shanxi Province, China." Thesis, Cardiff University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506618.

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Twenty two genera containing thirty eight species and nine problematic taxa of fossil plants are described from the Lower Shihhotse Formation of the Lower Permian of Dongshan, Taiyuan, North China. They include three new genera, seven new species and two new combinations. Five genera and six species are rediagnosed. The plants described include sphenophylls, discinites, marattialeans, pecopterids, alethopterids, emplecopterids, sphenopterids, tingias, cycads, cordaites and possible conifers. Discinites dentilongii sp. nov. (Noeggerathiales) is described having disc-like sporophylls with a decu

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Pacheco, Cristian Pereira. "Descrição de uma nova espécie de anfíbio (Tetrapoda Temnospondyli) para a formação Rio do Rasto (Permiano da Bacia do Paraná) e revisão do status filogenético de Archegosauroidea." Universidade Federal do Pampa, 2015. http://dspace.unipampa.edu.br:8080/xmlui/handle/riu/508.

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Submitted by Ana Damasceno (ana.damasceno@unipampa.edu.br) on 2016-09-12T19:13:34Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Descrição De Uma Nova Espécie De Anfíbio (Tetrapoda Temnospondyli) Para A Formação Rio Do Rasto (Permiano Da Bacia Do Paraná) E Revisão Do Status Filogenético De Archegosauroidea.pdf: 1777717 bytes, checksum: e8fc95d895ea7e2478fb697730895325 (MD5)<br>Made available in DSpace on 2016-09-12T19:13:34Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Descrição De Um

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Faria, Rafael Souza de 1985. "Licofitas Guadalupianas da Bacia do Parana : Novos dados morfo-anatomicos." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287313.

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Orientador: Fresia Soledad Ricardi-Branco<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Geociencias<br>Made available in DSpace on 2018-08-12T21:47:49Z (GMT). No. of bitstreams: 1 Faria_RafaelSouzade_M.pdf: 4846121 bytes, checksum: 06fbb408dd12015c7f8b819ab250dae9 (MD5) Previous issue date: 2009<br>Resumo: Lycopodiopsis derbyi é a espécie à qual mais comumente se relacionam os fragmentos caulinares licofíticos encontrados em estratos guadalupianos da Bacia do Paraná. Tipicamente caracteriza-se por um cilindro vascular sifonostélico com o anel descontínuo cortado

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14

Carroll, Paul Geoffery. "Pre-Permian structure and prospectivity at Gidgealpa, South Australia /." Title page, contents and abstract only, 1990. http://web4.library.adelaide.edu.au/theses/09SM/09smc3195.pdf.

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Thesis (M. Sc.)--University of Adelaide, National Centre of Petroleum Geology & Geophysics, 1992.<br>Vol. 2 consists of 30 col. & folded maps & charts. Includes five overlays in vol. 1. Includes bibliographical references (leaves 152-162).

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15

Perez, Ramos Olivia 1946. "Permian biostratigraphy and correlation between southeast Arizona and Sonora." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/558194.

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16

Boos, Alessandra Daniele da Silva. "Os terápsidos da Formação Rio do Rasto (Guadalupiano/Lopingiano, Bacia do Paraná): morfologia, taxonomia e aplicações bioestratigráficas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/140194.

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Localidades contendo tetrápodes fósseis do Permiano são conhecidas para a Formação Rio do Rasto (FRR) no sul do Brasil desde a década de 1970. Posteriormente, elas foram agrupadas em três “faunas locais”, correlacionáveis com as ocorrências de tetrápodes do Guadalupiano e do Lopingiano da África do Sul e da Rússia. Contudo, os fósseis de tetrápodes no Brasil ocorrem em afloramentos dispersos, isolados e discontínuos, de maneira que a maioria deles não possui dados precisos referentes ao seu posicionamento estratigráfico no sítio de coleta. Sugere-se que seja suspenso o uso do termo “fauna loca

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17

Paulo, Pedro Oliveira [UNESP]. "Vertebrados fósseis do estado de Goiás, com ênfase em sua fauna de amniotas, compreendida entre o período permiano e a época pleistoceno." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/92871.

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Made available in DSpace on 2014-06-11T19:26:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-09-29Bitstream added on 2014-06-13T20:34:02Z : No. of bitstreams: 1 paulo_po_me_rcla.pdf: 7478896 bytes, checksum: b407d0e66ef447d5ae6f5f6dd9e88ff6 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Embora possua significativas áreas com depósitos sedimentares, o Estado de Goiás apresenta-se quase inexplorado quanto aos vertebrados fósseis. O principal objetivo desta investigação foi reunir, em um único trabalho, todas as ocorrências de paleovertebrados de Goiá

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18

Chahud, Artur. "Geologia e paleontologia das formações Tatuí e Irati no centro-leste do Estado de São Paulo." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-29102012-120319/.

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A área de ocorrência das formações Tatuí e Irati, na região centro-leste do Estado de São Paulo, entre as cidades de Leme e Rio das Pedras é objeto desta pesquisa. São detalhadas as ocorrências destas duas formações, através de seções estratigráficas, caracterizando e analisando as sucessões de litotipos, conteúdo fossilífero, tafonomia dos fósseis, além de enfocar hipóteses paleoecológicas e paleoambientais. Na FormaçãoTatuí foram identificadas quatro fácies, a inferior de arenitos finos e paleoambiente incerto, duas refletindo contexto não marinho e a de topo com influência marinha. As

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19

Clark, James Anthony. "Controls on the distribution of upper Jurassic fulmar sandstones on the West Central Shelf, UK Central North Sea." Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/8873.

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20

Saila, Laura K. "Leptopleuron, anomoiodon and the Russian Permian procolophonoids: a study of the interrelationships, evolution and palaeobiogeography of procolophonoidea." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492478.

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The parareptilian group Procolophonoidea has been increasingly studied in recent years, and a high survival rate during the P/Tr extinction event has been estimated tor the ciade. Procolophonoid interrelationships, however, remain poorly known. Here, descriptions of the procolophonids Anomoiodon liliensterni and Leptopleuron lacertinum, and the possible Permian Russian procolophonoids, are provided. Anomoiodon and the genus Kapes were found to be closely related but there is not enough evidence to support the synonymy of the two genera. Leptopleuron is described in great detail, making it one

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21

Foster, William J. "Palaeoecology of the late Permian mass extinction and subsequent recovery." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/5467.

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Climate warming during the latest Permian is associated with the most severe mass extinction event of the Phanerozoic, and the expansion of hypoxic and anoxic conditions into shallow shelf settings. Our understanding of the magnitude, pattern and duration of the extinction event and subsequent recovery remains equivocal. Evidence suggests that the action of waves provided an oxygenated refuge, i.e. ‘habitable zone’, above wave base that may be limited to high latitudes, in association with a faster pace of recovery. In addition, advanced recovery faunas have been documented from the Induan and

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22

De, Blanger Keith. "The effect of the Permian mass extinction on shark faunas." Thesis, University of Bristol, 2005. http://hdl.handle.net/1983/98e915c9-71a4-4dd4-b66c-9d8a266abf3f.

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23

Platt, Jacqueline D. "The diagenesis of early Permian Rotliegend deposits from northwest Germany /." [S.l.] : [s.n.], 1991. http://www.ub.unibe.ch/content/bibliotheken_sammlungen/sondersammlungen/dissen_bestellformular/index_ger.html.

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24

Tarailo, David A. "Diversity and dispersal trends following the latest-permian mass extinction." Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6649.

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The latest-Permian mass extinction was the greatest biotic crisis of the Phanerozoic. The extinction decimated both marine and terrestrial communities, and changed the evolutionary trajectory of multicellular life on the planet. The unique nature of the extinction’s aftermath has prompted attention from paleontologists seeking to understand the timing and pattern of the Triassic recovery. With this dissertation I have sought to shed additional light on the terrestrial side of the extinction by examining different patterns by which its survivors responded to the extinction. Temnospondyl amphibi

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25

Santoso, Binarko. "Petrology of permian coal, Vasse Shelf, Perth Basin, Western Australia." Thesis, Curtin University, 1994. http://hdl.handle.net/20.500.11937/1466.

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The Early Permian coal samples for the study were obtained from the Vasse Shelf, southern Perth Basin, located approximately 200 km south- west of Perth. The selected coal samples for the study were also obtained from the Premier Sub-basin of the Collie Basin and the Irwin Sub-basin of the Perth Basin. The Early Permian coal measures are described as the Sue Coal Measures from the Vasse Shelf, the Ewington Coal Measures from the Premier Sub-basin and the coal measures from the Irwin sub-basin are described as the Irwin River Coal Measures.The Vasse Shelf coal is finely banded and the dominant

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Santoso, Binarko. "Petrology of permian coal, Vasse Shelf, Perth Basin, Western Australia." Curtin University of Technology, School of Applied Geology, 1994. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14920.

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The Early Permian coal samples for the study were obtained from the Vasse Shelf, southern Perth Basin, located approximately 200 km south- west of Perth. The selected coal samples for the study were also obtained from the Premier Sub-basin of the Collie Basin and the Irwin Sub-basin of the Perth Basin. The Early Permian coal measures are described as the Sue Coal Measures from the Vasse Shelf, the Ewington Coal Measures from the Premier Sub-basin and the coal measures from the Irwin sub-basin are described as the Irwin River Coal Measures.The Vasse Shelf coal is finely banded and the dominant

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27

Granmayeh, Assadollah. "Petrology and provenance of Permian glaciogenic sediments of southern Australia /." Title page and table of contents only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phg759.pdf.

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28

Rey, Kevin. "Thermophysiologie des thérapsides et changements climatiques du Permien et du Trias (300-200 Ma)." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1089/document.

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Les thérapsides se diversifient au cours du Permien et du Trias partout à la surface de la Pangée mais sans être épargné par la crise de la fin du Permien, extinction de masse la plus meurtrière de tous les temps. Ils représentent un groupe de transition entre les reptiles permiens et les premiers mammifères et sont le centre de plusieurs questions lié aux différences entre ces deux grands groupes. Cette thèse s'intéresse à la question de l'apparition et du développement de l'endothermie dans ce groupe, ainsi que les conditions environnementales présentes à cette époque. Pour répondre à ces qu

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29

Badaro, Victor Cezar Soficier. "Paleobiologia e contexto deposicional de microbialitos silicificados da formação Teresina (Permiano, Bacia do Paraná) no centro do Estado de São Paulo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-13112013-155421/.

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Microbialitos são depósitos biossedimentares formados a partir do aprisionamento, aglutinação e/ou precipitação de sedimentos por intermédio de microbiotas bentônicas, geralmente cianobacterianas. Ocasionalmente, esses depósitos podem preservar suas microbiotas formadoras, especialmente quando apresentam silicificação precoce, antes da degradação total de sua matéria orgânica. Organismos alóctones, como formas planctônicas decantadas e outras trazidas pelas correntes também costumam se preservar, ainda que em número muito menor. Microbialitos são elementos comuns dos dep

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Silva, Aurélio Fagundes. "Estudo da Bentonita associada com a Formação Irati na região de Aceguá, RS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/133656.

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A presença de tonsteins e bentonitas dentro da Supersequência Gondwana I no setor sul da Bacia do Paraná não são incomuns e suas ocorrências estão documentadas, especialmente nas unidades Rio Bonito e Rio do Rasto. Embora fosse esperada a identificação de bentonita na Formação Irati devido ao seu posicionamento estratigráfico dentro do Permiano e por estar vinculada a um ambiente que preenche os requisitos para acumular e preservar os eventos de deposição de cinza vulcânica, não são conhecidos trabalhos sistemáticos voltados para a identificação da bentonita na Formação Irati do Rio Grande do

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Mert-gauthier, Esra. "Modeling Permian Petroleum System Of Northeast Netherlands: Hydrocarbon Generation And Migration." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612508/index.pdf.

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Groningen Gas Field is located within the southern part of the South Permian Basin in the northeast Netherlands. Since several wells have been producing from the Carboniferous-Permian Petroleum System, the field is considered as mature for hydrocarbon exploration. More detailed work is necessary to evaluate further exploration and development opportunities. Thus, evaluation of the subsurface has been carried out as part of the petroleum system concept by using the basin modeling. In this study, seismic interpretation was performed by using 3-dimensional seismic and borehole data with Petrel so

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Hogan, Ian. "Paleo-fluid migration and diagenesis in the Pennsylvanian-Permian Fountain Formation." Thesis, Colorado State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1544780.

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<p> The Pennsylvanian-Permian Fountain Formation is an arkosic conglomeratic sandstone that was deposited in fluvial environments along the eastern flanks of the ancestral Rocky Mountains. The formation owes its pinkish red color to hematite cement that was precipitated early in its diagenetic history. Within the formation are whitened strata that crosscut laminations and facies boundaries, indicating that they are the result of a post depositional process. Whitened features are seen in core, indicating that they are not caused by modern weathering processes. Whitened strata similar to those p

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33

Becker, Andrew David. "Diagenesis of the Rotliegend Group (Lower Permian) : UK southern North Sea." Thesis, University of Birmingham, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392626.

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34

McKeever, Patrick J. "Studies on the sedimentology and palaeoecology of the Permian of Scotland." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335431.

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Goodall, Ian Geoffrey. "Sedimentology and diagenesis of the Edlington Formation (Upper Permian) of Teesside." Thesis, University of Reading, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328903.

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Alao, Abosede Olubukunola. "Basinfill of The Permian Tanqua depocentre, SW Karoo basin, South Africa." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20277.

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Thesis (MSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: Basin subsidence analysis, employing the backstripping method, indicates that fundamentally two different basin-generating mechanisms controlled Tanqua depocentre development in SW Karoo Basin. The subsidence curves display initial dominantly decelerating subsidence, suggesting an extensional and thermal control possibly in a strikeslip setting during the depocentre formation; on the other hand, subsequent accelerating subsidence with time suggests that the dominant control on the depocentre formation in SW Karoo was flexu

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Kearsey, Timothy. "Multi-proxy palaeoclimate reconstruction of the Permian-Triassic mass extinction event." Thesis, University of Plymouth, 2009. http://hdl.handle.net/10026.1/2096.

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The Permian/Triassic (P/Tr) boundary is widely assumed to have been a time of extreme environmental upheaval and change. In the terrestrial realm, a negative anomaly in 813C isotope values has been reported from organic carbon in Antarctica, Australia, India and Madagascar, and from marine carbonate in the Karoo Basin. However, these sections are all from southern palaeolatitudes. Analysis from the Permian-Triassic terrestrial sedimentary record of the South Urals, in Russia, comprising of many Aridisol and Vertisol horizons has revealed that, like the Southern Hemisphere, there is a dramatic

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Hulett, Sam Rw. "Detrital Zircon Analysis of Permian Victoria Group Sandstones, Transantarctic Mountains, Antarctica." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1355867143.

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Li, Hongqi. "Paleobiology of Gigantopterids from the Upper Permian of Guizhou Province, China /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu148793635615897.

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40

Rader, Dennis Lawrence 1959. "The depositional environment of the Permian Scherrer Formation in southeastern Arizona." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/558045.

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Al-Langawi, Alham Jassim. "Dolomitization of Permian and Triassic shelf carbonates from the Oman Mountains." Thesis, University of Manchester, 1996. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.667747.

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This study is based on field, petrographic and geochemical investigations of the Hajar Supergroup autochthonous rocks (Ruus A1 Jibal Group, Musandam Peninsula, and Akhdar Group, Jebel Akhdar, Oman). The petrographic investigations were carried out by using transmission light microscope, scanning electron microscope, and cathodoluminescence. They were supplemented by geochemical analysis, using microprobe, X-ray diffraction, ion chromatography, atomic absorption, stable isotopes, and quantitative analysis by the scanning electron microscope. Field and petrographic evidence indicates that the ro

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Zazzali, Sindbad. "Paléobiodiversité des ostracodes à la limite Permien moyen - Permien supérieur." Electronic Thesis or Diss., Paris 6, 2016. http://www.theses.fr/2016PA066111.

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Les ostracodes, microcrustacés (Arthropoda), sont relativement abondants dans les archives paléontologiques. Sensibles aux variations paléoenvironnementales, la composition des assemblages et leur diversité sont d’excellents marqueurs des changements qui affectent le benthos marin néritique. Leur diversité est connue pour être fortement affectée par la crise biologique marquant la limite Permien-Trias, mais leur histoire à la fin du Permien moyen reste peu documentée.Près de 10 Ma avant la limite Permien-Trias, à la fin du Permien moyen, un important épisode d’extinction intervient, préfiguran

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Sanders, Margaret McPherson. "GEOCHEMISTRYAND PETROGRAPHY OF THERMALLY METAMORPHOSED ANTARCTIC COAL: IMPLICATIONS FOR 13C -DEPLETED METHANE RELEASE." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/821.

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Large δ13C excursions present at the Permian-Triassic boundary are thought to indicate a considerable release of isotopically light carbon into the atmosphere (Retallack and Jahren, 2008). The largest of these excursions (-22.2 ‰) was measured in organic matter from Antarctica (Retallack and Jahren, 2008). Antarctic coals are known to be heavily intruded by Jurassic dikes and sills, and the δ13C values of the organic matter may have been influenced by later thermal alteration. In order to evaluate the influence of rank and maceral content on isotopic composition, a total of 335 samples describ

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Forte, Giuseppa. "An Integrated Study on Late Cisuralian (Early Permian) Palaeoenvironments and Palaeoclimate of Southern Alps." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3421836.

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The transition from ice-house to green-house conditions that characterized the Permian (289–252 million years ago) climate passed through several glacial and interglacial phases and an increase of aridity, which affected the palaeoequatorial regions. The causes behind this increase, which led to several important changes within the terrestrial ecosystems, are still poorly understood. During the Permian, extrabasinal floras, mainly composed of drought-tolerant plants such as conifers and other gymnosperms, started to spread and move into the lowlands, progressively replacing the hygrophytic low

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Shi, Xiao. "Fossil plants and environmental changes during the Permian-Triassic transition in Northwest China." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066588/document.

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La transition Permien – Trias est une période importante dans l’histoire de la Terre. L’extinction en masse de la fin du Permien est l’événement d’extinction le plus sévère de l’histoire de la vie sur Terre. Les études précédentes se sont principalement focalisées sur les événements biotiques en milieux océaniques. Récemment, de plus en plus de nouvelles recherches se sont développées sur les événements en milieu continental.Les bassins de Junggar et de Turpan en Chine du Nord, présentent une opportunité unique d’étudier la limite Permien – Trias en milieu continental grâce à de nombreux affle

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Laurini, Carolina Rettondini. "Elasmobrânquios fósseis da Serra do Cadeado, Estado do Paraná (formação Rio do Rasto, permiano superior)." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/59/59139/tde-02102015-113833/.

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Os Chondrichthyes são gnastotomados não-tetrapodos com esqueleto interno essencialmente cartilaginoso. Fortes evidências sugerem que o grupo seja monofilético, estando dividido em dois grupos irmãos, Elasmobranchii e Holocephali. Os Chondrichthyes são componentes comuns das faunas aquáticas do Paleozóico, mas a preservação de esqueletos parciais é rara devido à natureza cartilaginosa do mesmo. Assim, o registro paleontológico é composto basicamente pelas mais partes mineralizadas, tais como dentes, dentículos dérmicos e espinhos de nadadeira. Dentes isolados de tubarões paleozóicos ocorrem em

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Costa, Victor Eduardo Pauliv Cardenes da. "Sphenacanthidae e xenacanthidae (chondrichthyes: elasmobranchii) da formação Rio do Rasto no estado do Paraná." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/72173.

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As estruturas com maior possibilidade de fossilização do esqueleto dos Chondrichthyes são aquelas mais mineralizadas, tais como dentes, escamas, espinhos cefálicos e de nadadeiras. Na Formação Rio do Rasto, os Chondrichthyes estão representados predominantemente por dentes e espinhos de nadadeiras. Na presente dissertação, foram estudados espécimes coletados em um afloramento do Membro Serrinha da Formação Rio do Rasto próximo ao quilômetro 20 da BR-153 no Município de Jacarezinho, Estado do Paraná, Brasil. O material corresponde a dois conjuntos, um representado por dois espinhos de nadadeira

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Sigurdsen, Trond. "The lower permian dissorophoid «doleserpeton» (temnospondyli), and the evolution of modern amphibians." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86879.

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The origin and evolution of modern amphibians is still a subject of controversy. The amphibamid temnospondyl Doleserpeton has often been suggested as a close relative of modern amphibians, but the skeletal morphology of this important taxon has never been fully described. In this thesis, a study of the skeletal anatomy of Doleserpeton is presented, and the interrelationships of dissorophoids are discussed. The relationships of modern amphibians and Paleozoic tetrapods are studied using phylogenetic analyses based on both Bayesian inference and parsimony. The skull of Doleserpeton is preserved

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Jenkins, Ian. "Cranial form and function in some Permian carnivorous synapsid (mammal-like) reptiles." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407427.

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Hollingworth, N. T. J. "Palaeoecology of the Upper Permian Zechstein Cycle 1 reef of N.E. England." Thesis, Durham University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375050.

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