Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Pangea"”.
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Terrestrial Impacts of the Central Atlantic Magmatic Province on western Pangea
… first terrestrial record of the CAMP in western Pangea and provides more compelling evidence on the global impacts of the CAMP. Carbon isotope data along with previously published conchostracan data indicates that the end-Triassic extinction is within the lower portion of the Whitmore Point …
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Paleoenvironment and paleoclimate of NE Pangea in early Permian-linking chemo- and cyclo-stratigraphy, Bogda Mountains, NW China
… and time scales in Bogda Mountains, NE Pangea. Field investigations, petrographic observations, and geochemical analyses have been used to interpret paleoenvironment and paleoclimate in cm-m-scale high-order cycles (HCs: 0.1-100 kyrs), low-order cycles (LCs: 1-10 Myr), and critical …
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Supercontinental Inheritance and its Influence on Supercontinental Breakup: The Central Atlantic Magmatic Province and the Breakup of Pangea
… coincides with the breakup of the supercontinent Pangea. Major and trace element data, Sr-Nd-Pb radiogenic isotopes, and high-precision olivine chemistry were collected on primitive CAMP dikes from Virginia (VA). These new samples were used in conjunction with a global CAMP data set to elucidate …
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The search for an effective international regime for the long-term safety and security of high level radioactive waste: Pangea and beyond
… and into international collaboration. In 1999 Pangea Resources International (PRI) concentrated its efforts in securing a multinational HLW repository in the Australian outback, with its two main arguments being economic incentives for Australia and safety and security benefits for a broader …
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Geochemistry of mafic dikes from the Coastal New England magmatic province in southeast Maine, USA and Nova Scotia, Canada
… igneous province at 201 Ma and the breakup of Pangea. The intent of this study is to determine the melt source and mechanisms for melting which produced the Triassic coastal dikes. To achieve this goal, major and trace element compositions were analyzed for 53 CNE dikes from Maine and Nova …
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Characterisation of the Ugandan HIV epidemic with full-length genome sequence data from 1986 to 2016
… modern period (by the MRC/UVRI & LSHTM group and PANGEA), and another generated from stored 1986 serum samples using target-capture next generation sequencing. Uganda uniquely has two HIV subtypes at similar proportions, and although subtype A1 is older than subtype D, both subtypes are well …
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A Geophysical Delineation of A Normal Fault Within the Gulf Coastal Plain, Montgomery County, Texas
… Jurassic Period as a result of the breakup of Pangea and the rifting of North and South America. The Big Barn fault formed during the Jurassic but there is evidence that the fault plane has been recently reactivated. Within the past 20 years, extensive deformation and fractures within the …
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Stratigraphy and Depositional Characterization of the Moorefield Shale (Middle-Late Mississippian) in its Type Area, Northeastern Arkansas (Eastern Arkoma Basin)
… with Gondwanaland to form the supercontinent Pangea at the end of the Paleozoic. During this time, the midcontinent region was covered by shallow seas and carbonates covered most of the region. A shallowly dipping carbonate ramp developed in the region providing a foundation for clastic …
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Origin and stratigraphic architecture of the Middle Permian lower and upper Quanzijie low-order cycles, Bogda Mountains, NW China
… the paleo-mid-latitude along the east coast of Pangea. The Middle Permian lower and upper Quanzijie low-order cycles (QZJ LCs) provide a nearly complete sedimentary record in an area were little is known. In the first part of this work, the previously-established QZJ LC is divided into two LCs …
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Miocene paleoenvironments and paleosol pH proxies.
… middle and late Triassic paleosols from western Pangea, and the results indicate that a paleosols became progressively more alkaline as the megamonsoon climate system gradually diminished.
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Pseudoscorpion Systematics & Phylogenetics: Exploring the Effects of Accelerated Rates of Evolution on Both Ancient and Recent Diversification
… and breaking apart of the supercontinent Pangea, the rise and fall of the Dinosaurs, and many iterations of extreme global climatic fluctuations. Roughly 400 million years of diversification and extinction have resulted in 4,359 currently described extant pseudoscorpion species in 26 …
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The Lower Pennsylvanian New River Formation: a Nonmarine Record of Glacioeustasy in a Foreland Basin
… icehouse conditions and the tectonic assembly of Pangea. These events affected the geometry of the overall stratigraphic package, which can be attributed to high-magnitude, high-frequency, glacioeustatic sea-level fluctuations superimposed on asymmetric tectonic subsidence.
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INTO THE STRUCTURE OF THE PERMIAN DEEP CONTINENTAL CRUST: A MULTISCALE APPROACH TO RECONSTRUCT MIGMATIZATION IN THE VALPELLINE SERIES (DENT BLANCHE TECTONIC SYSTEM, WESTERN ITALIAN ALPS)
… lithosphere was affected by extension due to the Pangea break up followed by Tethys opening. This Thesis investigates the evolution of the Valpelline Series in the Dent-Blanche Tectonic System (Western Italian Alps) which represents an exceptionally preserved exposure of Permian deep continental …
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Oroclines of the Iberian Variscan belt: Tectonic and paleogeographic implications
… with the amalgamation of the supercontinent Pangea. The Iberian segment of the Variscan belt is characterized by Cantabrian orocline, which is 180º and convex toward the west. Several lines of evidence are at odds with classical interpretation of the Cantabrian orocline as the core of the …
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Paleomagnetism of Late Triassic and Jurassic sediments of the southwestern United States.
… abrupt change from counterclockwise rotation of Pangea prior to 200 Ma to clockwise rotation thereafter. Paleomagnetic poles obtained from the Summerville and Morrison formations are consistent with the Middle and Late Jurassic APW path described by the Corral Canyon and Glance Conglomerate …