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Dissertations / Theses on the topic 'Eocene'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Williams, David J. "The provenance of middle Eocene to late Eocene sands, Willunga Embayment, South Australia /." Title page, table of contents and abstract only, 1989. http://web4.library.adelaide.edu.au/theses/09S.B/09s.bw722.pdf.

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2

Rivero, Cuesta Lucía. "Response of Phytoplankton to Climatic Changes during the Eocene-Oligocene Transition at the North Atlantic ODP Site 612." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256769.

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The development of modern glacial climates occurred during the Eocene-Oligocene transition (34 to 35.5 Ma) when a decrease of atmospheric CO2 led to a global temperature fall. The ocean was deeply affected, both in the surface and the deep-sea, suffering a strong reorganization including currents and phytoplankton distribution. Spanning that time, 35 samples from the North Atlantic Ocean Drilling Program Site 612 have been analyzed by counting coccoliths abundance in different size groups (< 4 µm, 4 to 8 µm and > 8 µm) and silica fragments abundance. Absolute coccoliths abundance were es

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3

Kordesch, Wendy E. C. "Middle Eocene greenhouse climate instability." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/402327/.

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Understanding warm climate states is increasingly important as projections of anthropogenic climate change indicate atmospheric carbon dioxide concentrations in the coming century not previously seen on Earth for tens of millions of years. The Eocene (~56-34 Ma) is a critical period in the long-term Cenozoic climate evolution, encompassing the transition from widespread greenhouse warmth and high atmospheric carbon dioxide levels pervasive during the early Eocene to an icehouse world with major Antarctic ice sheets and cooler temperatures. Increasingly, it has become apparent that global clima

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4

Murray, Alison M. "The Eocene cichlids (Perciformes:Labroidei) of Mahenge, Tanzania /." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37794.

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A new genus and five new species of fossil cichlid fishes (Perciformes: Labroidei) are described from Mahenge, Tanzania. These cichlids represent the oldest confirmed fossils of the family, dating from the middle of the Eocene. The specimens share many lepidological characters, and, from comparison with other members of the family, are identified as being a monophyletic group. Therefore, they are described as belonging to a single genus, Mahengechromis gen. nov., named for the type locality. Detailed anatomical study of the well-preserved specimens allows five species to be identified, M. plet

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5

Adams, D. P. M. "Cretaceous and Eocene geology of South Westland." Thesis, University of Canterbury. Geology, 1987. http://hdl.handle.net/10092/7117.

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The Cretaceous and Eocene sequence of South Westland crops out within a 6km wide coastal area from Ship Creek to the Mahitahi River. The oldest unit, the Otumotu Formation (Motuan-Arowhanan), lies with angular unconformity on the Paleozoic Greenland Group. It is divided into two members, an older Tauweritiki Member (new) overlain by the Topsy Member. Both are entirely clastic but the lower unit is significantly coarser ranging from boulder conglomerate to mudstone, while granule conglomerate, sandstone analysis of sedimentary features to pebble breccia and the upper member comprises and mudst

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6

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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7

Baky, Alaaeldin Mohamed Abdel. "Maastrichtian to early Eocene calcareous nannofossils from Egypt." Thesis, University College London (University of London), 1988. http://discovery.ucl.ac.uk/1317747/.

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A study of calcareous nannofossils from the Maastrichtian-Early Eocene from Egypt has resulted in the recognition of four Maastrichtian and seven Early Tertiary biostratigraphic zones. These nannoplankton zones are based upon local ranges and compared with the zones proposed by Martini (1971), Sissingh (1977), Verbeek (1977) and Romein (1979). A new zone, the Fasciculithus ragaae Zone is described and the E1lipsolithus macellus Zone and the Fasciculithus tympaniformis Zone are emended. Study of the vertical ranges of the species provided many markers (including the zonal markers) with distinct

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8

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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9

Sahy, Claudia Diana. "Geochronology and chronostratigraphy of the Eocene-Oligocene transition." Thesis, University of Leicester, 2014. http://hdl.handle.net/2381/28952.

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This thesis integrates high-precision (<0.2%, 2σ) [superscript 206]Pb/[superscript 238]U dating of zircons from volcanic tuffs intercalated in key Late Eocene-Oligocene marine and terrestrial sedimentary successions, with high-resolution biostratigraphic and magnetostratigraphic data sets in order to critically examine the accuracy and precision of the numerical age calibration of the Eocene – Oligocene transition (EOT). Weighted mean [superscript 206]Pb/[superscript 238]U ages from the Italian Umbria-Marche and North American White River Group (WRG) sedimentary successions are 0.4-1.0 Myr you

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10

Cameron, Adele Jane. "Ocean circulation during Eocene extreme "greenhouse" climatic warmth." Thesis, Open University, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.699820.

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The Early Eocene (47-56 Ma) 'greenhouse' climate represented the warmest climatic conditions witnessed in the last 90 million years, with peak Eocene warmth (the Early Eocene Climatic optimum, EECO) occurring around 50-52 Ma (Sexton et al. 2006; Bijl et al. 2009; Zachos et al. 2008; Littler et al. 2014) with subsequent global cooling thereafter (Sexton et al. 2006; Zachos et al. 2008). Ocean circulation plays a critical role in redistributing thermal energy across the planet and providing ventilation to the deepest parts of the ocean. Understanding how it may have operated in a globally warm w

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11

Gregory, Kathryn Mary. "Late Eocene paleoaltitude, paleoclimate, and paleogeography of the Front Range region, Colorado." Diss., The University of Arizona, 1992. http://hdl.handle.net/10150/185985.

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Erosion beveled the Laramide Front Range uplift in Colorado to a surface of low relief by the end of the Eocene. This study uses paleobotanic climate analysis techniques to determine the paleoelevation of this regional surface by examining the overlying 34.9 Ma Florissant flora. Multiple regression models explaining 93.4% of the variance in mean annual temperature (MAT), 86.1% of the variance in growing season precipitation (GSP) and 65.7% of the variance in rainfall distribution were derived from J. A. Wolfe's dataset of 31 leaf physiognomic character states from 86 modern vegetation sites. W

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12

Julian, Meaghan Elizabeth. "Benthic foraminiferal faunal changes during the Eocene/Oligocene climate transition at Ocean Drilling Program (ODP) sites 1209A and 1211A from the Shatsky Rise, central Pacific Ocean." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1519.

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13

Meunier, Mathias. "Biodiversity, biostratigraphy, disparity and macroecology of middle Eocene radiolarians (Rhizaria) : insights to their biotic response to the Middle Eocene Climatic Optimum (MECO)." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILR078.

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L'Optimum Climatique de l'Éocène Moyen (MECO) est un évènement de réchauffement climatique qui s'est produit il y a 40 Ma, interrompant temporairement la tendance générale au refroidissement observée durant l'Éocène. Bien que le MECO soit l'une des perturbations climatiques les plus importantes du Paléogène, son impact sur la biosphère demeure encore mal connu. Via un large éventail de méthodes quantitatives, cette thèse vise à étudier la dynamique de la paléodiversité et la disparité morphologique des radiolaires au cours du MECO, afin de mieux comprendre les bouleversements biotiques qui lui

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14

Dubin, Andrea Rose. "A magmatic trigger for the Paleocene-Eocene thermal maximum?" Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98670.

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Thesis: Ph. D., Joint Program in Chemical Oceanography (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Fifty-six million years ago Earth experienced rapid global warming (~6°C) that was caused by the release of large amounts of carbon into the ocean-atmosphere system. This Paleocene-Eocene Thermal Maximum (PETM) is often cited as an analogue of anthropogenic climate change. Many trigger mechanisms for the carb

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15

Edgar, Kirsty M. "Palaeoclimatology, stratigraphy and biotic responses in the middle Eocene." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/65670/.

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The Middle Eocene (37 to 49 million years ago, Ma) was characterised by warmer global temperatures and higher atmospheric carbon dioxide (pCO2) levels than today with only small/non-existant icesheets. Because predicted pCO2 levels for the coming century have not been seen on Earth since at least ~40 Ma thus, the primary objective of this thesis is to improve our understanding of the nature, timing and consequences of carbon perturbations in the Middle Eocene between 39 and 43 Ma. In Chapter 3, a new (instrument specific) methodology for measuring Mg/Ca in foraminiferal calcite is developed to

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16

Clifton, Abigail Joy. "The Eocene flora of Svalbard and its climatic significance." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/21133/.

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Fossil plant remains are preserved within the deposits of the Eocene Aspelintoppen Formation on Svalbard. These sediments form the youngest continental deposits of early Paleogene age. The Aspelintoppen Formation sediments represent crevasse splay, backswamp and ephemeral lake deposits that represent a broad lowland floodplain that was subject to frequent flooding. The forests grew at a palaeolatitude of 75°N. New collections (1032 specimens) ofthe Aspelintoppen Formation flora are dominated by angiosperms including the Fagaceae? (Ushia olafsenii), Betulaceae (Corylites and Craspedodromophyllu

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17

Guest, Rachel L. "Description and phylogenetic analysis of a new alligatoroid from the Eocene of Laredo, Texas." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4636.

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18

Wallett, Lane A. "Eocene selachian fauna from nearshore marine deposits, Ampazony, Northwestern Madagascar /." Connect to online version, 2006. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2006/147.pdf.

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19

Scrivan, Leonie Jane. "Diversity of the mid-Eocene Maslin Bay flora, South Australia /." Title page, contents and abstract only, 1993. http://web4.library.adelaide.edu.au/theses/09PH/09phs434.pdf.

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20

Bains, Santo. "Climate change and biological feedbacks at the Palaeocene-Eocene boundary." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403931.

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21

Hathway, B. "The Eocene to Miocene geology of southwest Viti Levu, Fiji." Thesis, Oxford Brookes University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233454.

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22

Broadbent, Tom. "Low latitude pacific palaeoceanographic change across the Eocene/Oligocene boundary." Thesis, Bangor University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529758.

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23

Dagher, Marcelle Bou. "Lower Eocene shelf smaller foraminifera a comparative inter-regional study." Thesis, University College London (University of London), 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260930.

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24

Sulaiman, Nursufiah Binti. "Late Eocene palaeoenvironment and palaeoclimate of the US Gulf Coast." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7752/.

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This thesis presents new micro palaeontological and geochemical palaenvironmental proxy data through the late Eocene into the earliest Oligocene from a clay-rich succession from the US Gulf Coast. It is based on samples from the Yazoo Clay Formation, recovered in the Mossy Grove Core near Jackson, Mississippi. This represents an apparently continuous section of relatively uniform lithology, clay-rich deposits that host very well preserved assemblages of calcareous nannofossils, foraminifera and organic biomarkers. This thesis makes use of these to generate a detailed calcareous nannofossil tax

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25

Pedley, Antony. "Eocene foreland basin carbonatae facies, the external Sierras, Spanish Pyrenees." Thesis, Royal Holloway, University of London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261690.

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This thesis explores the controls on carbonate platform formation in foreland basins through a study of the facies, and depositional architecture, of the Middle Eocene Guara Limestone Formation, from the External Sierras, Northern Spain. The Guara Limestone Formation formed in a ramp environment on the Iberian foreland margin of the South Pyrenean Foreland Basin. The facies are foraminifera and algal limestones, with minor shallow marine siliciclastics. A facies model has been erected indicating 19 facies, grouped into 6 facies associations. Using these facies and associations, the evolution o

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26

Moss, Jamie. "Tectonic controls on Eocene deltaic architecture, Jaca Basin, Spanish Pyrenees." Thesis, Durham University, 2005. http://etheses.dur.ac.uk/3730/.

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The Jaca Basin lies to the south of the Pyrenean mountain chain, in Spain, and was formed by the Late Cretaceous and Tertiary convergence between the Iberian and European tectonic plates. During the Bartonian (Middle Eocene), sediment flux from the uplifting Pyrenees was deposited in this basin as the Belsué-Atarés Fm. deltaic system. At the same time, southward propagation of deformation from the orogen created a number of emergent thrusts and thrust-related anticlines along the margins of the basin and within the basin itself. The effect that the growth of these kilometre-scale structures ha

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27

Lelono, Eko Budi. "Palynological study of the Eocene Nanggulan Formation, Central Java, Indonesia." Thesis, Royal Holloway, University of London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743090.

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28

Vinyoles, i. Busquets Andreu. "Sediment routing systems of the Eocene Tremp-Jaca basin: Stratigraphic analysis and numerical models." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/672479.

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The Eocene South-Pyrenean foreland basin provides a continuum of outcrops representing a Source to Sink sediment routing system from subaerial canyons to deep marine environments. On this context, the specific objective of this study is: (a) to contribute to the knowledge of the chronostratigraphy and the basin infill of the study area; (b) to analyze the evolution of the sedimentation rates on the Tremp-Jaca basin; and (c) to generate numerical models to (i) assess the sediment routing and sediment balance and, (ii) to evaluate the basin response to the propagation of climatic and tectonic si

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29

Díaz, Poveda Leonardo. "Evolución sedimentaria y estructural del Eoceno superior, Cordillera oriental de Colombia, Sur América." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396371.

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Colombia se encuentra situada en la esquina NW de Sur América, este sector de gran complejidad tectónica es un margen destructivo por convergencia de placas. Convergen las placas de Suramérica, de afinidad continental, y las placas Pacifica y Caribe, de afinidad oceánica. La complejidad está en que la placa Pacifica subduce a la placa de Suramérica en el sector sur de Colombia y en la parte media colisiona oblicuamente. La placa Caribe colisiona también oblicuamente, generando un régimen transpresivo y en la parte norte colisiona con la placa Suramericana a lo largo de una zona de fallas trans

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30

Belazi, Hadi S. "Sedimentology of Middle-Upper Eocene formations, Nafoora-Augila field, Libya (SPLAJ)." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/8580.

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31

Poole, Imogen. "A palaeoecological study of the "twigs" from the Eocene London Clay." Thesis, Royal Holloway, University of London, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734435.

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32

Moss, Graham. "The Port Willunga Formation : Eocene/Oligocene boundary stratigraphy and foraminiferal turnover /." Adelaide, 1989. http://web4.library.adelaide.edu.au/theses/09SB/09sbm913.pdf.

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33

Carozza, David. "Carbon cycle box modeling studies of the Paleocene-Eocene thermal maximum." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66818.

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Approximately 55 million years ago, an unprecedented amount of light carbon was abruptly released into the ocean and atmosphere. This event, known as the Paleocene-Eocene thermal maximum (PETM), is documented by large negative carbon isotope excursions in marine and soil carbonates and by global environmental changes. Models have been applied to constrain the amount of carbon released during the PETM. In this study, the Walker-Kasting carbon cycle box model is revisited and, after correcting its carbon isotope equations, it is used to resolve a discrepancy in previous emissio

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34

Swei, Giuma Hedwi. "Sedimentology, diagenesis and reservoir characteristics of Eocene carbonates Sirt Basin, Libya." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/491/.

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The reservoir quality of Middle Eocene carbonates in the intracratonic Sirt Basin (at the northern margin of the African continent) is strongly influenced by depositional facies and various diagenetic modifications. This thesis investigates the petrography, sedimentology, diagenetic evolution and hydrocarbon potential of the Middle Eocene Gialo Formation in the subsurface of the north-central Sirt Basin based on data from core samples and well logs from five boreholes in the Assumood and Sahl gas-fields. Reducing risk in exploration demands an understanding of reservoir facies development, whi

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35

Dawber, C. F. "The middle Eocene climate transition : insights from foraminiferal and sedimentary records." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598412.

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New seawater oxygen isotope reconstructions support the presence of a dynamic cryosphere since the early Middle Eocene with significant ice storage in both hemispheres. The onset of early Cenozoic glaciation is hypothesised to be intimately linked with levels of atmospheric <i>p</i>CO<sub>2</sub>. The relationship between bottom water carbonate saturation and the trace metal composition of the benthic foraminifera <i>Oridorsalis umbonatus </i>is investigated using core top and Middle Eocene data sets. B/Ca, Li/Ca and Sr/Ca ratios are correlated with bottom water carbonate saturation, whilst Mg

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36

Bordet, Esther-Jeanne. "Eocene volcanic response to the tectonic evolution of the Canadian Cordillera." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46271.

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The Ootsa Lake Group (OLG) represents a voluminous episode of Eocene volcanism across the Interior plateau of British Columbia (BC), in the Canadian Cordillera. Remarkable aspects of the rocks (lithology, texture, volume, extent, and geochemistry) suggest that even though they formed along an active continental margin, the tectonic setting was different from a classic arc. The OLG was defined by field mapping, U-Pb and ??????Ar/?????Ar geochronology, major and trace elements geochemistry, and three-dimensional modelling of the thickness and structure. A new tectonic model for the evolution of

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37

McKervey, John Antony. "The petrogenesis of the Eocene Challis Volcanic Group, Idaho, western U.S.A." Thesis, Open University, 1998. http://oro.open.ac.uk/57877/.

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The rocks of the Challis Volcanic Group, Idaho are investigated and constraints on their petrogenesis used to evaluate the tectonic control on the formation of early, extensionassociated magmatism in the western U. S. A. New and published 40Ar-39Ar analyses indicate that the rocks of the Challis Volcanic Group erupted between - 50 and 45 Ma at extrusion rates estimated at 0.01 to 0.03 km3 yr 1. The rocks have high-K calcalkaline/ shoshonitic compositions and incompatible trace element analyses show them to be LILE and LREE enriched ((La/Yb) -7 to 20) but relatively depleted in Nb, Ta and Ti (e

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38

Cotton, Laura. "Paleogene larger benthic foraminifera of Tanzania and the Eocene-Oligocene Transition." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/42726/.

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Mass extinctions are important events for the evolution of life on Earth but often the mechanisms behind them are poorly understood. The Eocene - Oligocene Transition (EOT) had a profound and lasting influence on global climate and, though not one of the “big 5” mass extinction events, widespread extinctions in many fossil groups have been recognised. Larger benthic foraminifera (LBF), one of the most conspicuous and widespread fossil groups during the Eocene, are known to have experienced a rapid global overturning during the EOT, including the extinction of long-ranging families such as the

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39

Charles, Adam J. "Palaeoceanographic change during the Palaeocene/Eocene thermal maximum in Arctic Spitsbergen." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/336449/.

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The interaction of the ocean, atmosphere and ice in the Arctic region plays a critical role in modulating global climate. However, recent observations have illustrated the region is changing rapidly in response to anthropogenically-induced warming. Given the uncertainty in climate model predictions, one way to analyse the response of the Arctic to warming is to generate records through transient warm intervals from the geological past. However, the most pronounced warming event of the Cenozoic, known as the Palaeocene/Eocene thermal maximum (PETM), is poorly documented in the Arctic region. Th

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40

Al-Alaween, Mohammad. "An organic geochemical study of the Jordanian Eocene Marl oil-shales." Thesis, University of Newcastle upon Tyne, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.744759.

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Unconventional natural energy resources, such as oil shales, constitute significant petroleum exploration opportunities. One promising example, which was deposited in an extended shelf environment of the Campanian-Eocene southern Neo-Tethyan margin, is the organic-rich marlstone in Jordan. In this study, new high-resolution depth profiles of bulk and molecular geochemical proxies are presented, collected from three cores drilled in central Jordan. Despite pronounced fluctuations in total organic carbon (TOC) (min. 0.4, max. 36.8, av. 11.0 %) and total sulphur (TS) (min. 0.1, max. 8.7, av. 2.7

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41

Canile, Fernanda Maciel. "Evidências geológicas de mudanças climáticas (greenhouse-icehouse) na Antártica Ocidental durante a passagem Eoceno-Oligoceno." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-08012011-203025/.

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Durante o Eoceno e o Oligoceno (55 a 23 Ma) a Terra esteve sujeita a período de grandes mudanças climáticas. Registros geológicos, reforçados por modelos climáticos, indicam que o clima global durante esse período passou de estágio praticamente livre de calotas polares para situacao climática próxima a que hoje podemos encontrar na Antártica. Grande parte desses registros são indiretos, retirados de sedimentos de fundo marinho ou de material fóssil. Evidência terrestre clara da variação climática (greenhouse-icehouse) para o Eoceno-Oligoceno pode ser encontrada em Wesele Cove, ilha Rei Jorge,

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42

Smith, Nicholas E. "Acquiring three-dimensional data from small mammalian teeth laser scanning Eocene marsupials /." Huntington, WV : [Marshall University Libraries], 2007. http://www.marshall.edu/etd/descript.asp?ref=779.

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43

Smyth, Helen. "Eocene to Miocene basin history and volcanic activity in East Java, Indonesia." Thesis, Royal Holloway, University of London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417139.

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44

King, Christopher. "Stratigraphy of the London Clay Formation (Early Eocene) in the Hampshire Basin." Thesis, Kingston University, 1991. http://eprints.kingston.ac.uk/20552/.

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Stratigraphy of the London Clay Formation (Early Eocene) in the Hampshire Basin Lithological logging and micropalaeontological analysis of selected exposures and boreholes in the London Clay Formation of the Hampshire Basin has enabled detailed correlation and subdivision of the Formation. The sediments are classified into nine main lithofacies, deposited in marine shelf and marginal-marine environments. The recognition and correlation of numerous minor stratigraphic discontinuities within the Formation enables its subdivision into 22 depositional sequences. Within each sequence, an initial ma

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45

Heri, Alexandra Regina. "Geochemistry, geochronology and isotope geochemistry of eocene dykes intruding the Ladakh batholith." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B50899624.

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Eocene dykes intruding the Ladakh batholith were sampled along the southern margin of the Trans-himalayan plutonic arc in Ladakh, NW-India. Approximately 30 dykes were encountered in the 40 km trail between Leh and Hemis Shugpachan. The dykes in the east of the field are trending E to NE and those in the west trending N to NW, exhibiting sub-parallel orientations within each area. Eighteen dykes were sampled (two of them multiple times) and subjected to petrographic, geochemical and isotopic analyses. They exhibit various degrees of differentiation from basaltic to rhyolitic compositions and

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46

Sayer, Zoë Rebecca. "The Nummulitique : carbonate deposition in a foreland basin setting, Eocene, French Alps." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/6103/.

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The Eocene Nummulitique (Lutetian to Priabonian) has been studied in the external chains of the French Alps in Haute Savoie and Haute Provence. The Nummulitique unconformably overlies the Mesozoic passive margin succession and represents the onset of sedimentation in the Alpine Foreland Basin which formed due to lithospheric flexure caused by the advance of the Alpine orogeny. The base of the formation is marked by a regional erosional unconformity that developed during subaerial exposure of the Alpine foreland. The Nummulitique may be divided into two informal members: the lower Infranummulit

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Scudder, Christopher A. "Structure and Emplacement of the Eocene Golden Horn Batholith, North Cascades, Washington." Thesis, San Jose State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10815329.

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<p> The 48 Ma Golden Horn batholith is a ~310 km<sup>2</sup>, shallow intrusion constructed of sub-horizontal sheets in the crystalline core of the North Cascades of Washington. It is the only large body of granite in an orogen dominated by 96–45 Ma tonalite, and probably intruded during ridge subduction. The oldest and structurally highest unit of the batholith is diorite, followed by alkaline granite, one feldspar-biotite granite, two feldspar-biotite granite, and finally granodiorite, the youngest and structurally lowest unit. The batholith displays a weak NE-striking foliation restri

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48

Schroeder, Melissa Light. "Palynological reconstructions of Early Eocene flora of the Wind River Basin, Wyoming." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1375541094.

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49

Thrasher, Bridget L. "Regional climate modeling studies of western North America under early Eocene conditions /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2009. http://uclibs.org/PID/11984.

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50

Kickham, Julie C. "Structural and Kinematic Evolution of Eocene-Oligocene Grasshopper Extensional Basin, Southwest Montana." DigitalCommons@USU, 2002. https://digitalcommons.usu.edu/etd/6729.

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The Grasshopper basin of southwest Montana is a complex east-dipping graben containing five unconformity-bounded sequences of Tertiary sedimentary rocks. The Eocene-Oligocene basin lies within the northern Rocky Mountain Basin and Range province. Geologic mapping in five and a half 7.5 minute quadrangles indicates that at least three distinct phases of extension characterize the Cenozoic tectonic evolution of Grasshopper basin from approximately 46 Ma toMa. The significant phases of extension in Grasshopper basin were phases 1 and 3. During the first phase of extension (46-27 Ma) the nonplanar

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