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 20 of 39 for “"Late Jurassic"”.
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High-resolution environmental change in the late Jurassic Kimmeridge clay formation
Several discrete intervals of the Late Jurassic Kimmeridge Clay Formation were analyzed to assess the high-resolution environmental change, which occurs within laminated lithologies. The material was from new boreholes drilled in Dorset, southern England, for the Rapid Global Geological Events …
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Palynofacies and sedimentology of some Late Jurassic sediments from the British Isles and northern North Sea
… The proportion of terrestial organic matter correlates with grain size, proximity to fluvial sources and level of oxygenation. Palynomorph assemblages vary along gradients of hydrodynamic energy and proximity to fluvial sources. Dinocysts can be directly related to hydrographic stability; they are …
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Late Jurassic to Early Cretaceous stable isotope and geochemical records from the northern high latitudes: implications for palaeoclimate
The Jurassic and Cretaceous periods are widely accepted as being dominated by greenhouse conditions with elevated CO2 levels and warm polar regions. Although much compelling evidence to support this idea of global warmth exists, some recent studies propose that the greenhouse climate may at times …
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Two New Dinosaur Bonebeds From the Late Jurassic Morrison Formation, Bighorn Basin, Wy: an Analysis of the Paleontology and Stratigraphy
… is where the boundary between the Morrison Fm. (Jurassic) and the Cloverly Fm. (Cretaceous) lies. This new study attempted to show if the current method (Kvale, 1986) of determining the boundary is appropriate. The stratigraphy of the area was examined using Kvale, 1986, Ostrom, 1970, and …
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Sequence Development and Dolomitization of a Late Jurassic Giant Oil Reservoir, Arab-D Reservoir, Hawiyah (GHAWAR) and Harmaliyah Fields, Saudi Arabia
Thirty cores from the Late Jurassic uppermost Jubaila, Arab-D reservoir and Arab-D anhydrite in Hawiyah (Ghawar) and Harmaliyah fields, eastern Saudi Arabia were studied to document the detailed facies stacking and high resolution sequence stratigraphy. The Jubaila-Arab-D interval is a shallowing …
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Mesozoic Rift Evolution and Crustal Structure of the Gulf of Mexico Basin from Integration of Multiple Geological and Geophysical Datasets
… However, our understanding of the Triassic-Jurassic rift history and crustal structure of the GOM is limited. This dissertation integrates satellite free-air gravity data, full-tensor gravity gradient data, 104,000 line-kilometers of 2D reflection data, and publicly available refraction data …
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Syn-sedimentary tectonostratigraphic influence and isotopic δ18O and δ13C characterization of the Kimmeridgian Akimpech Formation, Campeche-Chiapas Subbasin (Campeche Sound), offshore Mexico.
… controls on the deposition and early- to late-diagenetic evolution of the Late Jurassic (Kimmeridgian) Akimpech Formation in the Campeche-Chiapas Subbasin, offshore Mexico and tests two dominant paradigms.
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Understanding Non-Plume Related Intraplate Volcanism
Intraplate volcanism is a worldwide phenomenon producing volcanoes away from active plate boundaries, a process that cannot yet be sufficiently explained by plate tectonic processes, and thus is still a missing piece in the understanding of the dynamics and evolution of our planet. Models for the …
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Sequence Stratigraphy and Source Rock Characterization of Organic-Rich Shales Within the Jurassic Smackover Formation, Conecuh Embayment, Alabama, U.S.A.
The Upper Jurassic Smackover Formation is a prolific producer of hydrocarbons known throughout the U.S. Gulf Coast region, and typically consists of carbonate lime mudstones, ooid grainstones, microbial boundstones, and dolostones. Recent exploration efforts in the Conecuh Embayment of southwest …
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Fluid/rock Interaction History of a Faulted Rhyolite-Granite Contact, Eastern Rhine Graben Shoulder, SW-Germany : Alteration Processes Determined by Sr- Pb-Isotopes, Th/U-Disequilibria and Elemental Distributions
… showing notable disturbances during the late Jurassic hydrothermal activities, the Tertiary rifting of the Rhine Graben and more recent Quaternary alteration. The granite zone of the sampling profile has underwent an event which set up a new Rb-Sr isotopic composition and reset the Rb/Sr …
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A quantitative approach to the evolution of the central Walvis Basin offshore NW-Namibia : structure, mass balancing, and hydrocarbon potential
Rifting and breakup of Westgondwana in the Late Jurassic/ Early Cretaceous initiated the formation of the South Atlantic and its conjugated pair of passive continental margins. The Walvis Basin offshore NW-Namibia is an Early Cretaceous to recent depositional centre with a typically wedge-shaped …
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Paleomagnetism of Late Triassic and Jurassic sediments of the southwestern United States.
… During the Carnian and Norian stages of the Late Triassic, Chinle poles progress westward. During the Hettangian through Pliensbachian stages of the Early Jurassic, the pattern of APW changed to an eastward progression. Even after correction for 4° clockwise rotation of the Colorado Plateau, …
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Using 2D and 3D basin modelling and seismic seepage indicators to investigate controls on hydrocarbon migration and accumulation in the Vulcan Sub-basin, Timor Sea, North-western Australia.
… the spatial distributions of hydrocarbon related diagenetic zones (HRDZs) in the region, as well as the distribution of other leakage and seepage indicators. A new method for identifying potential HRDZs using seismic data has also been developed. The 2D/3D modeling results from the Swan …
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Analysis of the Upper Cotton Valley Group in the Northeastern Mississippi Interior Salt Basin
… of Mexico. The Cotton Valley Group is an Upper Jurassic – Lower Cretaceous subsurface siliciclastic unit that has been studied extensively in the MISB for the last several decades because of its high potential as a reservoir rock. This study focuses on the Shuler Formation in the Upper Cotton …
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Seismic stratigraphy and burial history for source and reservour prediction in the Luderitz basin, license blocks 2412B and 2413B, offshore Namibia
… opening of the South Atlantic during the late Jurassic and Cretaceous. It is considered as a hydrocarbon frontier that is largely under-explored with only one well (2513/8-1) drilled since the wake of hydrocarbon exploration along the Namibian offshore in the 1990s. Selected lines of the …
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A seismic stratigraphic analysis and petroleum system characterization of the cretaceous sequence in central Walvis basin, offshore Namibia
… intervals (SI) have been identified spanning Late Jurassic to Cretaceous based on seismic character and well log data corresponding to the evolutionary stages of the Walvis Basin. The proposed seismic sequence stratigraphy model suggests source, reservoir, trap, and seal rocks in both the …
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Kimmeridgian and Volgian fault-margin sedimentation in the Northern North Sea area
The Upper Jurassic sediments of the East Coast of Sutherland and the South Brae Oilfield were deposited during the late Jurassic taphrogenic episode in which there was rapid subsidence in the grabens and uplift of the adjacent areas. The initiation of coarse-grained sedimentation in the grabens was …
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Electrofacies, elemental composition, and source rock characteristics along seismic reflectors of the Vaca Muerta Formation in the Loma La Lata area, Neuquen Basin, Argentina
… unit that was deposited during the Late Jurassic and Early Cretaceous in the Neuquén Basin of Argentina. Accommodation space was generated by back-arc subsidence of the crust as the Pacific Plate subducted beneath the South American Plate during and after the break-up of the Gondwana …
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Cretaceous Nerineacean gastropods
… deposited in tropical regions during the Jurassic and Cretaceous. The group first appears in the early Jurassic and high diversity levels had developed by late Jurassic and early Cretaceous times. A major extinction episode occurred during the latter part of the Cenomanian and the …
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Tectonostratigraphic evolution of the offshore Gippsland Basin, Victoria, Australia: results from 3D seismic interpretation and 2D section restoration, The
… with the break-up of Gondwana during the late Jurassic / early Cretaceous and the basin has endured multiple rifting and inversion events. Strong tectonic control on the sedimentary development of the basin is reflected in the deposition of several major, basin scale sequences ranging in …
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