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Dissertations / Theses on the topic 'Foraminiferos'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

Arriaga, Cavalieri Maria Eugenia. "Patrones de supervivencia y recuperación de los macroforaminíferos después de la extinción en masa del límite Cenomaniense-Turoniense." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/394041.

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Los macroforaminiferos constituyen un grupo de organismos k-estrategas de abundante presencia en los ambientes de plataformas pocos profundas, tanto en la actualidad como en el registro fósil, siendo a su vez uno de los grupos más susceptible a cambios en el medio am¬biente. Durante la transición Cenomanience – Turoniense (CTB), la cual coincide con un epi¬sodio global de depositación de sedimentos ricos en materia orgánica (Evento Anóxico 2 o Evento Bonarelli), los macroforaminíferos que poblaban las plataformas carbonatadas fueron dramáticamente afectados por el drástico cambio en las condi
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2

Silva, Cristiane Pakulski da. "Bioestratigrafia e paleoecologia de foraminíferos da Bacia de Barreirinhas, cretácio, margem equatorial brasileira." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/38528.

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O presente estudo integra informações bioestratigráficas e paleoecológicas obtidas através da análise de foraminíferos planctônicos e bentônicos recuperados dos sedimentos provenientes de cinco poços (1-MAS-1, 1-MAS-3A, 1-MAS-4A, 1-MAS-14 e 1-MAS-15) da Bacia de Barreirinhas, perfazendo um total de 127 amostras de calha preparadas e analisadas. Os sedimentos aqui analisados abrangem os andares Albiano superior ao Campaniano superior com registro geológico inserido nos grupos Caju (Albiano - Cenomaniano) e Humberto de Campos (Turoniano - Maastrichtiano). Através dos dados bioestratigráficos obt
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3

Zerfass, Geise de Santana dos Anjos. "Estudos paleoambientais com base em isótopos de carbono, oxigênio e estrôncio em foraminíferos do terciário da Bacia de Pelotas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/23713.

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A Bacia de Pelotas, localizada na porção sul da margem continental brasileira, foi formada a partir da fragmentação do supercontinente Gondwana e preenchida por sedimentos essencialmente siliciclásticos desde o Cretáceo. A ausência de rochas vulcânicas apropriadas para a datação através de métodos radiométricos na seção terciária da bacia e a abundância de microfósseis de parede calcária, constitui um cenário favorável para a utilização da razão isotópica de estrôncio visando à obtenção de dados cronoestratigráficos. Além dos microfósseis de parede calcária, a ocorrência conspícua de microfóss
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4

Nagai, Renata Hanae. "Variações de paleoprodutividade na plataforma interna de Cabo Frio, RJ, durante o holoceno." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/21/21133/tde-24092009-111219/.

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Análises sedimentológicas, geoquímicas e microfaunísticas realizadas em um testemunho coletado na plataforma interna de Cabo Frio, permitiram a compreensão das variações de produtividade nos últimos 9.300 anos. Quatro fases foram reconhecidas, influenciadas por flutuações do nível relativo do mar e mudanças climáticas que ocorreram na margem continental sudeste Brasileira, durante o Holoceno. Antes de 7,0 kanos cal A.P., os dados apontam para baixa produtividade, sob condições de nível relativo do mar mais baixo e clima úmido. Entre 7,0 e 5,8 kanos cal A.P., há aumento na produtividade oceânic
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5

Disaró, Sibelle Trevisan. "Caracterização da plataforma continental da Bacia de Campos (Brasil, SE) fundamentada em foraminíferos bentônicos recentes." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/172465.

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Foraminíferos bentônicos vivos foram estudados visando a caracterização da plataforma continental da Bacia de Campos (sudeste do Brasil; 20.5°S - 24°S). Espécimes coletados no período seco/inverno/ressurgências menos frequentes de 2008 e no período chuvoso/verão/ressurgências mais frequentes de 2009 foram analisados para investigar padrões de distribuição espacial e temporal. As estações foram distribuídas em cinco isóbatas (25, 50, 75, 100 e 150 m), de nove transectos perpendiculares à linha de costa, totalizando 45 estações. Em cada estação, com busca-fundo e com delimitador 10 cm2 coletou-s
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6

Bowen, Powell Jacqueline. "Larger Foraminiferal Biostratigraphy, Systematics And Paleoenvironments of The Avon Park Formation and Ocala Limestone, Highlands County, Florida." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/288.

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This study investigates the use of larger foraminifera in determining the biostratigraphy of the Avon Park Formation and the Ocala Limestone in central Florida. Sedimentary rocks of the Avon Park Formation are the oldest exposed deposits in the state of Florida, and together with the Ocala Limestone comprise a part of the confining unit of the Floridan Aquifer, a major source of Florida’s water supply. Material from the ROMP 29A core collected by the U. S. Geological Survey was evaluated and compared to previous studies of the biostratigraphy of the formations. The larger foraminifera of the A
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7

Mayer, Michaela. "Zur Ökologie der Benthos-Foraminiferen der Potter Cove (King George Island, Antarktis) = Ecology of benthic foraminifera in the Potter Cove (King George Island, Antarctica) /." Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung, 2000. http://www.gbv.de/dms/bs/toc/314065083.pdf.

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8

Varhelyi, Aron. "Quaternary Arctic foraminiferal isotopes: species reliability and palaeoceanographic application." Thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-158047.

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To investigate whether foraminiferal stable isotope (δ18O/δ13C) variations have potential as a chronostratigraphic tool in the Arctic Ocean, this thesis presents new δ18O/δ13C data from five marine sediment cores. Three of those are downcore analyses (PS92/54-1; TC/PC-03; PC-07) and the remaining two are core top analyses (PC-04; PC-08). Seven species of benthic foraminifera (Cassidulina neoteretis, Cibicides lobatulus, Cibicidoides wuellerstorfi, Oridorsalis tener, Quinqueloculina arctica, Stainforthia concava and Triloculina sp.) and one planktic (Neogloboquadrina pachyderma sinistral) were
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9

Licari, Laetitia. "Ecological preferences of Benthic Foraminifera in the Eastern South Atlantic : distribution patterns, stable carbon isotopic composition, and paleoceanographic implications = Ökologische Ansprüche benthischer Foraminiferen im östlichen Südatlantik /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 2006. http://www.gbv.de/dms/bs/toc/514912308.pdf.

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10

Leiter, Carola. "Benthos-Foraminiferen in Extremhabitaten." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-95510.

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11

Hurley, John Vincent. "Late-middle Eocene glacioeustacy : evidence from stable isotopes and foraminifera of the the [sic] Planktonic foraminiferan zone P14 (Truncorotaloides rohri zone), Mossy Grove Core, Hinds County, Mississippi." Virtual Press, 1999. http://liblink.bsu.edu/uhtbin/catkey/1117851.

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Glacioeustatic control of a late-middle Eocene oxygen isotope record is evident from the comparison of such a record with an independent proxy for sea-level. The data, δ18O and planktonic:benthic foraminifera ratios, were determined from samples of the Mossy Grove Core, Hinds County, Mississippi. The temporal order of magnitude for the glacioeustatic cycles, while smaller than two other orders of sea level change identified from this sedimentary package, is comparable to those associated with Milankovitch cycles. Refinement of the sample interval’s sequence statigraphy recognizes a Healing
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12

Kuhn, Winfried. "Paleozäne und untereozäne Benthos-Foraminiferen des bayerischen und salzburgischen Helvetikums - Systematik, Stratigraphie und Palökologie /." München : F. Pfeil, 1992. http://catalogue.bnf.fr/ark:/12148/cb37429165g.

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13

Brückner, Sylvia [Verfasser]. "Climatic and hydrographic variability in the late Holocene Skagerrak as deduced from benthic foraminiferal proxies = Klimatische und hydrographische Variabilität im holozänen Skagerrak, abgeleitet aus benthischen Foraminiferen / Sylvia Brückner." Bremenhaven : Alfred- Wegener-Inst. für Polar- und Meeresforschung, 2008. http://d-nb.info/997391057/34.

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14

Lundquist, Jason James. "Foraminiferal biostratigraphic and paleoceanographic analysis of the Eagle Ford, Austin, and Lower Taylor groups (Middle Cenomanian through Lower Campanian) of central Texas /." Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.

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15

Sanchez, Rios Maria Antonieta Guadalupe. "Foraminifères planctoniques et nannoplancton calcaire de quelques sites du Crétacé supérieur mexicain et sud-pyrénéen /." Toulouse : Université Paul Sabatier, Laboratoire de géologie sédimentaire et paléontologie, 1989. http://catalogue.bnf.fr/ark:/12148/cb35712901s.

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16

Ferguson, Julie E. "Palaeoclimate from foraminifers and molluscs in the Mediterranean." Thesis, University of Oxford, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547592.

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17

Buchan, Olivia Claire Lewis Ronald D. "Relationships between large benthic foraminifera and their seagrass habitats, San Salvador, Bahamas." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/master's/BUCHAN_OLIVIA_31.pdf.

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18

Caromel, Aude Genevieve Marcelle. "Form and function in planktic foraminifera." Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.628998.

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Planktic foraminiferal tests and their morphology have been the subject of extensive study for biostratigraphy and palaeoenvironmental reconstructions. Iterative evolution of morphological designs and correlations between morphology and environmental parameters suggest either fundamental intrinsic constraints on form , or a functional control, or both. Yet the adaptive significance of the test morphologies in terms of these constraints has never been rigorously explored, and is the focus of this thesis. The developmental and growth constraints delimiting the scope of action for evolution were
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19

Toth, Emoke. "Changements paléoenvironnementaux dans la Parathéthys Centrale pendant le Samartien (Miocène moyen) : étude paléontologique de microfaunes et analyses géochimiques." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00843092.

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Les changements paléoenvironnementaux se produisant pendant le Sarmatien dans la Paratéthys Centrale ont été reconstitués par l'étude des foraminifères (36 espèces) et des ostracodes (28 espèces) de deux forages, combinée à une analyse géochimique de leurs squelettes calcitiques, des coquilles aragonitiques de gastéropodes et des dents phosphatiques de rongeurs.La composition de la microfaune indique que la connexion entre la Paratéthys et la Méditerranée est interrompue ou réduite à la base du Sarmatien mais qu'un bras de mer persiste entre Paratéthys Centrale et Paratéthys Orientale jusqu'à
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20

Birse, S. E. A. "Experimental and computational studies on foraminiferal calcite." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596662.

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In this thesis, the effect of dissolution on the chemistry and structure of perforate planktonic foraminiferal tests was investigated. Atomistic simulations were undertaken to study the energetics of magnesium ions in calcite and their structural ordering in the {104} surface. Shell mass, δ<sup>18</sup>O<sub>c</sub> and Mg/Ca measurements were obtained on core-top tests of foraminifera from depth transects in the Indian and Pacific oceans. The degree to which dissolution biased the temperature determined from δ<sup>18</sup>O<sub>c</sub> and Mg/Ca measurements was found to be similar for <i>G.
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21

Barker, S. "Planktonic foraminiferal proxies for temperature and pCO2." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.596364.

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The thesis aims to describe developments in the uses of planktonic foraminiferal calcite for oceanographic applications, specifically Mg/Ca ratios and foraminiferal shell weights as proxies for calcification temperature and paleo-<i>p</i>CO<sub>2</sub> respectively. Sample preparation for the analysis of Mg/Ca and Sr/Ca ratios in foraminiferal calcite is investigated with the aim of defining a method that will give reproducible results and minimise signal contaminations. Each step of the cleaning procedure is scrutinised in order to gauge which are most important and which may be omitted as un
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22

Lea, David Wallace. "Foraminiferal and coralline barium as paleoceanographic tracers." Thesis, Massachusetts Institute of Technology, 1990. http://hdl.handle.net/1721.1/54332.

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23

Pearson, Paul Nicholas. "Evolution and phylogeny of Palaeogene planktonic foraminifera." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386154.

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24

Seears, Heidi. "Biogeography and phylogenetics of the planktonic foraminifera." Thesis, University of Nottingham, 2011. http://eprints.nottingham.ac.uk/11879/.

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The planktonic foraminifera are a highly abundant and diverse group of marine pelagic protists that are ubiquitously distributed throughout the worlds’ oceans. These unicellular eukaryotes are encased in a calcareous (CaCO3) shell or ‘test’, the morphology of which is used to identify individual ‘morphospecies’. The foraminifera have an exceptional fossil record, spanning over 180 million years, and as microfossils provide a highly successful paleoproxy for dating sedimentary rocks and archiving past climate. Molecular studies, using the small subunit (SSU) ribosomal (r) RNA gene are used here
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Ward, Juliette Natalie. "Foraminifera as proxiles for monitoring organic pollution." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398830.

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26

Al-Sayigh, Abdul Razak Siddiq. "Lower Tertiary Foraminifera from south east Oman." Thesis, Aberystwyth University, 1999. http://hdl.handle.net/2160/1a8d5b93-df4b-412e-aecb-38c02de78e03.

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Over 250 samples were collected over three field seasons from the SE Oman Mountains. Fortyone species of planktonic Foraminifera (belonging to 7 genera) and twenty-eight species of larger benthonic Foraminifera, (belonging to 13 genera) are figured (both by SEM and optical photography) from the Wadi Musawa and Wadi Suq sections. Nine planktonic foraminiferal zones are formally recognised between the Upper Palaeocene(P 4) and upper Middle Eocene (P14). The known stratigraphic distribution of these species was used to recognise the zones P 5, P8-P9 as equivalentt o standard zones of Blow, 1969,1
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Coxall, Helen Katherine. "Hantkeninid planktonic foraminifera and Eocene palaeoceanographic change." Thesis, University of Bristol, 2000. http://hdl.handle.net/1983/8efa1d22-0ff8-45a3-9a5c-bd5ea90e266f.

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The morphological and ecologicalevolution of middle-upper Eocene planktonic foraminiferal family Hantkeninidae is investigated in the context of the dramatic palaeoceanographic and climatic changes that marked the transition from Paleogene "greenhouse" to Neogene "icehouse" climatic conditions. Morphometric analysis proves that evolution in family Hantkeninidae was gradual but complex in detail with periods of relative stasis. Multiple lines of evidence demonstrate that Hantkenina evolved from planispiral clavate genus Clavigerinella and not, as was previously believed, from Pseudohastigerina
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28

Mehrota, Nivedita. "Reconstruction of Holocene Paleoclimate Based on Benthic Foraminiferal Assemblages from Soledad Basin." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1310628185.

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29

Eberwein, Astrid. "Holocene and Last Glacial Maximum (paleo-)productivity off Morroco : evidence from benthic foraminifera and stable carbon isotopes = (Paläo-)produktivität im Holozän und Letzten Glazialen Maximum vor Marokko erschlossen aus benthischen Foraminiferen und stabilen Kohlenstoffisotopen /." Bremerhaven : Alfred-Wegener-Institut für Polar- und Meeresforschung, 2007. http://www.loc.gov/catdir/toc/fy0712/2007425451.html.

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30

Volkmann, Renate. "Planktic foraminifer ecology and stable isotope geochemistry in the Arctic Ocean : implications from water column and sediment surface studies for quantitative reconstructions of oceanic parameters = Ökologie planktischer Foraminiferen und stabile Isotope im Arktischen Ozean /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 2000. http://www.gbv.de/dms/bs/toc/315939354.pdf.

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31

Allen, Kathryn. "Composition and structure of foraminiferal agglutinated test walls." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284673.

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32

Sexton, Philip. "Foraminiferal taphonomy, palaeoecology and palaeoceanography of the Eocene." Thesis, University of Southampton, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416473.

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33

Wade, Christopher Mark. "Analysis of HIV-1 and foraminiferal molecular evolution." Thesis, University of Edinburgh, 1997. http://hdl.handle.net/1842/14622.

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In section A, five papers are presented which examine the evolution of HIV-1 both within and between patients. The first paper presented examines the molecular epidemiology of HIV-1 within Scotland, Northern England, and Ireland (paper I), with attention focused on identifying risk group associated differences within the cohort. This work also provides important background information for the interpretation of molecular data from transmission clusters. The main focus of the work on HIV-1 evolution has been on the transmission of HIV-1, with particular emphasis placed on mother-child transmissi
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34

Dai, Yuhao. "Reconstructing seawater carbonate chemistry using foraminiferal B/Ca." Phd thesis, Canberra, ACT : The Australian National University, 2018. http://hdl.handle.net/1885/144599.

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Planktonic B/Ca holds promise of reconstructing the surface seawater carbonate chemistry, which is linked to the past levels of atmospheric partial pressure of CO2. However, it is still not clear to what extent the carbonate chemistry control on planktonic B/Ca is complicated by physiological activities of foraminifera. In this thesis, the environmental controls on B/Ca in two planktonic foraminiferal species, Globigerinoides ruber (white) and Globigerinoides sacculifer (without final sac-like chamber), are examined using core-top samples from the Atlant
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Berberich, Doris. "Die planktische Foraminifere Neogloboquadrina pachyderma (Ehrenberg) im Weddellmeer, Antarktis = The planktonic foraminifere Neogloboquadrina pachyderma (Ehrenberg) in the Weddell Sea, Antarctica /." Bremerhaven : Alfred-Wegener-Inst. für Polar- und Meeresforschung, 1996. http://www.gbv.de/dms/bs/toc/194515826.pdf.

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36

Reichelt, Kerstin. "Late Aptian-Albian of the Vocontian Basin (SE-France) and Albian of NE-Texas biostratigraphic and paleoceanographic implications by planktic foraminifera faunas /." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974321591.

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Hudson, Wendy. "The evolution and palaeobiogeography of Mesozoic planktonic foraminifera." Thesis, University of Plymouth, 2007. http://hdl.handle.net/10026.1/719.

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In the 1960s Oberhauser and Fuchs (palaeontologists working at the Geologische Bundesanstalt in Vienna) described a range of new taxa from the Triassic of Austria that were thought to be the earliest planktonic foraminifera. The first reactions of the palaeontological community were negative but in the subsequent forty years our knowledge of Jurassic planktonic foraminifera has expanded considerably. A thorough re-evaluation of the Oberhauser and Fuchs collections in Vienna has shown that these species are probably not planktonic and that the first planktonic taxa appeared in the Toarcian. Thi
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Chapman, Mark Robert. "Late Pliocene planktonic foraminifera : palaeoceanography and faunal evolution." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332388.

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Khanna, Nikki. "The biological response of foraminifera to ocean acidification." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/8089.

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Elevated atmospheric concentrations of carbon dioxide (CO₂), partly driven by anthropogenic activity, are decreasing the pH of the oceans. This thesis aimed to assess the biological response of foraminifera to ocean acidification. Foraminifera are single-celled organisms that form the dominant component of many marine communities. A series of laboratory experiments were carried out on benthic intertidal foraminifera from the Eden and Ythan estuaries, NE Scotland, to assess the impacts of ocean acidification. The responses of two dominant intertidal species of foraminifera (Haynesina germanica
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Stouff, Véronique. "Interet des elevages de foraminiferes en laboratoire : etudes biologiques et ultrastructurales." Angers, 1998. http://www.theses.fr/1998ANGE0023.

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Apres un bref rappel sur le mode de vie et la biologie des foraminiferes, la methodologie des elevages est precisee, depuis la recolte jusqu'a la mise en place des specimens en incubateur. Les especes qui se sont le mieux adaptees aux conditions d'elevage (ammonia tepida, ammonia beccarii et elphidium crispum essentiellement) ont fait l'objet d'etudes biologiques et morphologiques en microscopie optique et en microscopie electronique a balayage (meb). Le suivi de la gametogenese a permis l'observation de gametes d'ammonia tepida et d'ammonia beccarii, et de zygotes d'ammonia beccarii. La schiz
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Dos, Santos Francisco Kelmo Oliveira. "Ecological consequences of the 1997-98 El Niño Southern Oscillation on the major coral reef communities from northern Bahia, Brazil." Thesis, University of Plymouth, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246378.

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Speed, Craig Duncan. "High-resolution palaeoceanography of extreme early Pliocene carbonate-opal cycles in the eastern equatorial Pacific." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274423.

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43

Bordelon, Laura Anne. "AUSTRAL AUTUMN AND WINTER SEASONAL AFFECTS ON BENTHIC FORAMINIFERAL COMMUNITIES: BRANSFIELD AND NORTHERN GERLACHE STRAITS." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/150.

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The Southern Ocean has unique seasonal qualities due to the Antarctic Circumpolar Current (ACC) thermo-isolating the Antarctic continent. During summer months, surface primary productivity from algal blooms is very high. In the winter months, limited daylight hours (4 in winter) and formation of sea ice prevents sun light from reaching surface waters, therefore limiting productivity. The short seasons of productivity and long winters in Antarctica combined with seasonal changes in deep ocean temperatures, salinity, and fluxes of organic matter impact foraminiferal population dynamics. Fluctu
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44

Demirel, Seda. "Foraminiferal Paleontology And Sequence Stratigraphy In The Upper Visean." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614831/index.pdf.

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The aim of this study is to investigate the Upper Visean substages, delineate the Visean - Serpukhovian boundary with calcareous foraminifera and interpret the foraminiferal evolution and sequence stratigraphical framework by using sedimentary cyclicity across the boundary section. For this purpose a 59,61 m thick stratigraphic section consisting of mainly limestone and partly sandstone and shale is measured in the Aziziye Gedigi and Oru&ccedil<br>oglu Formations in the Pinarbasi Region of Eastern Taurides. A detailed micropaleontological study has revealed presence of important foraminifera
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Laidler, Philip Damien. "Foraminiferal ecology of contemporary isolation basins in northwest Scotland." Thesis, Durham University, 2002. http://etheses.dur.ac.uk/4143/.

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Isolation basins contain high-resolution records of environmental change relating to RSL and climate since the last glacial maximum, and provide valuable data in constraining regional and global ice sheet and earth rheology models. A key weakness in current research is a lack of information regarding the identification of the reference tide level of different stages of basin isolation, and the role of factors such as freshwater input in controlling palaeosalinity. To address these issues, this thesis reports data collected from modern isolation basins from twenty sites in northwest Scotland. T
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46

Leary, Paul Niell. "The Late Cenomanian anoxic event : implications for foraminiferal evolution." Thesis, University of Plymouth, 1987. http://hdl.handle.net/10026.1/2057.

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This study lnvestigates the effect of the late Cenomanian Oceanic Anoxic Event (OAE) on the planktonic and benthonic foraminifera. On the former, the OAE was the cause of major extinctions within the population, the return to pre-OAE oxygen levels permitting recolonization of the vacated niches. On the latter, the OAE caused extinctions but resulted in a low oxygen tolerant fauna which slowly evolved into the vacated niches on the post-oAE recovery of oxygen levels. The changes in the foraminiferal populations have been integrated With changes in other marine organisms through the late Cenoman
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47

Gfatter, Christian Helmut. "Application of Image Recognition Technology to Foraminiferal Assemblage Analyses." Scholar Commons, 2018. https://scholarcommons.usf.edu/etd/7506.

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Analyses of foraminiferal assemblages involve time consuming microscopic assessment of sediment samples. Image recognition software, which systematically matches features within sample images against an image library, is widely used in contexts ranging from law enforcement to medical research. At present, scientific applications such as identification of specimens in plankton samples utilize flow through systems in which samples are suspended in liquid and pass through a beam of light where the images are captured using transmitted light. Identification of foraminifers generally utilizes refle
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48

Falzoni, F. "SANTONIAN-CAMPANIAN PLANKTONIC FORAMINIFERAL BIOSTRATIGRAPHY, TAXONOMY AND ISOTOPE PALEOECOLOGY." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/169982.

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Current biozonations based on Santonian-Campanian (Late Cretaceous) planktonic foraminiferal bioevents do not provide a high stratigraphic resolution, when compared to other time intervals. Moreover, some of the marker species of the Tethyan biozonation show a diachronous lowest occurrence across latitudes and a restricted geographic distribution. Thus, paleoclimatic and paleoceanographic inferences are poorly constrained by biostratigraphy and, in addition, are often based on diagenetically altered material. This study is aimed to 1) improve the biostratigraphic resolution of Santonian-Camp
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Amirov, Elnur Fikret. "Planktonic Foraminiferal Biostratigraphy, Sequence Stratigraphy And Foraminiferal Response To Sedimentary Cyclicity In The Upper Cretaceous-paleocene Of The Haymana Basin (central Anatolia, Turkey)." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12610140/index.pdf.

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The aim of this study is to establish the planktonic foraminiferal biozonation, to construct the sequence stratigraphical framework and to determine the foraminiferal response to sedimentary cyclicity in the sedimentary sequence spanning Upper Cretaceous-Paleocene in the Haymana basin (Central Anatolia, Turkey). In order to achieve this study, the stratigraphic section was measured from sedimentary sequence of the Haymana, Beyobasi and YeSilyurt formations. The sedimentary sequence is mainly characterized by flyschoidal sequence that is composed of alternating of siliciclastic and carbonate un
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Vicedo, Vicedo Vicent. "Morfoestructura de los géneros cretácicos de los Rhapydioninidae (Foraminifera)." Doctoral thesis, Universitat Autònoma de Barcelona, 2008. http://hdl.handle.net/10803/3447.

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Los rapidionínidos representan un elemento importante, diverso y abundante en las comunidades de macroforaminíferos porcelanados de aguas poco profundas del Cretácico medio y superior. Su morfología general es muy similar, por lo que es necesario un estudio morfológico detallado para distinguir los géneros y especies en el interior de los diferentes grupos implicados. La revisión de los taxones aquí estudiados ha permitido eliminar ciertas contradicciones e inconsistencias que se han dado en la literatura del grupo, incrementar su potencial valor como fósiles guía y entender mejor el signific
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