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 17 of 17 for “"Eustasy"”.
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Stratigraphic evolution of lower Jurassic carbonate platforms: record of rift tectonics and eustasy, central and eastern High Atlas, Morocco
Includes bibliographical references (pages 324-341).
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To and fro in the archipelago: Repeated inter-island dispersal, eustasy and New Guinea’s orogeny affect diversification of Delias, the world’s largest butterfly genus
… timing of their divergence to examine whether eustasy (sea level fluctuations), and/or New Guinea orogeny coincide with <em>Delias</em> diversification. The MRCA of a clade with <em>~</em> 80% of species dispersed out of New Guinea <em>ca.</em> 14 Mya, but at least six subsequently diverging …
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Orbital-scale fluctuations in continental weathering flux and continental ice-volume during greenhouse and icehouse climate intervals : evidence from oxygen and neodymium isotopes
… recorded by δ18O as a proxy for glacio-eustasy and sea surface temperature and µNd as a proxy for continental weathering and wet/warm or dry/cool climate during two global greenhouse intervals: the Late Silurian and Late Devonian. The first study (Chapter 1) explores whether …
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High-Resolution Sequence Stratigraphy of Late Mississippian (Chesterian) Mixed Carbonates and Siliciclastics, Illinois Basin
… tracts. Increasing amplitude 4th-order glacio-eustasy produced the sequences and caused the upward increase in incised valleys and deeper water carbonate deposition. Parasequences were produced by 5th-order glacio-eustatic sea-level fluctuations (20-100 k.y.). Sequence pairs and composite …
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Depositional Environments and Sequence Stratigraphy of Upper Mississippian Strata in the Central Appalachian Basin
… within the sequences suggests a link between eustasy and patterns of global-scale atmospheric circulation. Calcic vertisols and lacustrine carbonates in coastal plain successions are suggestive of seasonal, semiarid climatic conditions during highstand progradation. Leached paleosols and coals …
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Analysis of cyclic shallow-water carbonates: Cambrian Highland Peak Formation, eastern Nevada
… Two of these minimum accommodation zones record eustasy.
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Investigating evidence of high frequency glacial eustacy in the Lower Mississippian (Tournasian) Lodgepole Formation of southwest Montana : insights from conodont oxygen isotopes
… that the cycles developed in response to glacial eustasy, evaluate the timing and initiation of the Late Paleozoic Ice Age (LPIA), and to better understand the carbon budget in response to cycle formation. δ18Oapatite trends across targeted cycles support the hypothesis of glacial eustatic origins …
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GEOCHEMICAL CHARACTERIZATION OF THE BONE SPRING FORMATION, DELAWARE BASIN, USING CHEMOSTRATIGRAPHY AND INTEGRATED PETROPHYSICS
… turbidites, and slumps. In addition to glacio-eustasy, both tectonism and broader Milankovitch cycles have influenced the depositional history. Previous investigations have utilized cores and wireline logs to provide high-resolution chemo-facies segregation, which can be correlated with …
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Stratigraphic Architecture and Paleogeography of the Juniata Formation, Central Appalachians
… to study the effects of both tectonics and eustasy within a foreland-basin setting. The Juniata Formation consists of red sandstones, siltstones, and shales that were deposited as part of an extensive siliciclastic basin-fill that resulted from the Taconic Orogeny. This study attempts to …
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An Integrated Well Log and 3D Seismic Interpretation of Missourian Clinoforms, Osage County, Oklahoma
… during the Late Pennsylvanian because of glacio-eustasy and possible tectonism. </p>
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High Resolution Stratigraphy of Ordovician Carbonates, Kentucky: Evidence for a Greenhouse to Glacial Transition
… level fluctuations, likely produced by glacio-eustasy. However, peritidal cycles in the HST's indicate they formed under low-amplitude sea level fluctuations, thus suggesting the amplitude of sea level fluctuations decreased during 3rd-order sea level falls. The facies in the supersequence …
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State-Wide Sequence Framework of Mixed Carbonate-Siliciclastic Ramp Reservoirs: Mississippian Big Lime, West Virginia, USA
… the slope section, evaluates evidence for glacio-eustasy during the transition into ice-house times. The major mappable sequences are fourth-order sequences, a few meters to over 90 meters (300 feet) thick. They consist of updip red beds and eolianites, lagoonal muddy carbonates, ooid grainstone …
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Insights Into the Stratigraphic Evolution of the Early Pennsylvanian Pocahontas Basin, Virginia
… indicate extrabasinal trends in ice-volume and eustasy. High-frequency eustatic sequences are nested within four asymmetric composite-sequences, attributed to low-frequency variations in tectonic accommodation. Evidence for tectonic forcing on foreland-basin accommodation is based on abrupt …
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Vulnerability of Coal- and Natural Gas-Fired Power Plants to Climate Change
… by allogenic processes (i.e., subsidence, eustasy, and sediment supply), laterally-moving autogenic processes, or a combination of both. Because of this, the model can be used to track how autogenic and allogenic processes interact to impact the evolution of fluvio-deltaic systems as more …
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Petrogenesis of Pliocene limestones in southern Hawke’s Bay, New Zealand: a contribution to unravelling the sequence stratigraphy and diagenetic pathways of cool-water shelf carbonate facies
… and more global parameters, namely tectonics and eustasy, may have driven diagenetic pathways, and how this occurred; and (3) more generally advance fundamental knowledge about models of porosity evolution in non-tropical carbonates. The present study integrates the combined results of detailed …
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Reservoir Characterization of the Utica Shale Play Using Well Log Data in Columbiana, Ohio
<p>The Ordovician Utica shale play is rapidly developing throughout the Appalachian Basin. The play is a mixed carbonate-siliciclastic system that grades from primarily carbonates at its base in the Lexington/Trenton limestones into primarily shale within the Utica shale. As of January 2021, it is …
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High-Precision ID-TIMS U-Pb Zircon Geochronology of Three Cenomanian Bentonites from the Western Canada Foreland Basin
The Western Canada foreland basin contains a rich record of Upper Cretaceous marine | and tectonic change, yet is sparse in biostratigraphically useful fauna that permit | continental and global correlation. However, numerous extensive bentonites have been 1 mapped in Cenomanian strata and traced …