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 19 of 19 for “"Western Interior Seaway"”.
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Sedimentary and ecosystem response to Late Cretaceous (Cenomanian - Turonian) paleoenvironmental events along the eastern margin of the Western Interior Seaway, Canada.
During the Cretaceous Period, the Western Interior Seaway (WIS) was influenced by long-term and short-term environmental changes. Vertebrate bonebeds are particularly abundant within the Cenomanian-aged strata of the Western Interior Sedimentary Basin’s eastern margin. The major control for their …
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High precision U/Pb geochronology on the Cenomanian Dakota Formation, Utah : implications for paleobotany and the transgression of the Western Interior Seaway preceding Oceanic Anoxic Event 2
… deposited during the Cenomanian, a time when the Western Interior Seaway spanned much of North America. The Dakota Formation contains a rich record of plant and animal fossils. Key to understanding their importance, it is imperative to precisely place the Dakota Formation within the geological …
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New evidence for complex mosasaur paleobiology: oxygen isotopes in enamel reveal habitat variation of clidastes from the Mooreville Chalk, Alabama
… the time-equivalent Kansas Niobrara Chalk of the Western Interior Seaway. Phosphate oxygen isotope records from all eight teeth in the C. propython specimen correlate well and are spliced to build a longer record of water composition change. The spliced isotopic record is characterized by two …
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Quantitative palynological analyses of Albian-Cenomanian (Lower to Upper Cretaceous) strata in the Sverdrup Basin: Insights into paleoecology, paleoclimatology and palynostratigraphy
… such as, the Arctic Ocean, the extent of the Western Interior Seaway, or due to limited insect pollination dispersal strategies.
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Revisão taxonômica e do registro fóssil de tartarugas marinhas não-Protostegidae do Cretáceo
… were very abundant, following the coast of the Western Interior Seaway from Canada to south USA. All species of Pan-Chelonioidea from Cretaceous possessed limbs modified into paddles as adaptation for the marine environment, which allowed them to colonize small and large bodies of water. Their …
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Regional stratigraphy of the Newcastle Formation (Lower Cretaceous) in eastern Montana and western North Dakota
… the possible lowstand position of the Western Interior Seaway along with probable source areas providing sediments into the study area. </p><p> A total of 3446 geophysical wireline logs were used to determine formation tops of the Greenhorn, Mowry, Newcastle, Skull Creek, and Inyan Kara …
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GEOCHEMICAL ANALYSIS OF THE EAGLE FORD SHALE IN WEBB AND DIMMIT COUNTIES, TX
… for the Eagle Ford Shale in relation to the Western Interior Seaway and provides insights into its depositional dynamics, sediment provenance, and implications for reservoir quality.</p>
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INTERNAL FACIES ARCHITECTURE OF A REGRESSIVE TO TRANSGRESSIVE WAVE-DOMINATED DELTA IN THE UPPER CRETACEOUS EAGLE FORMATION, SOUTH-CENTRAL MONTANA
… in south-central Montana was deposited along the western margin of the Cretaceous Western Interior Seaway and is composed of a series of well preserved regressive and transgressive deposits. This study documents the depositional evolution of the informal lower member of the Eagle Formation exposed …
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INTERNAL FACIES ARCHITECTURE OF A REGRESSIVE TO TRANSGRESSIVE WAVE-DOMINATED DELTA IN THE UPPER CRETACEOUS EAGLE FORMATION, SOUTH-CENTRAL MONTANA
… in south-central Montana was deposited along the western margin of the Cretaceous Western Interior Seaway and is composed of a series of well preserved regressive and transgressive deposits. This study documents the depositional evolution of the informal lower member of the Eagle Formation exposed …
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CONTRASTING PROCESSES OF DEPOSITION IN THE LATE CRETACEOUS PANTHER TONGUE SANDSTONE OF CENTRAL UTAH: THE ROLE OF AUTOGENIC VERSUS ALLOGENIC PROCESSES, AND THE IMPORTANCE OF HYPERPYCNAL FLOW
… of the Sevier Fold and Thrust Belt to the Western Interior Seaway. Paired with the newfound internal complexity of deltaic Panther Tongue strata, this suggests that the temporal and spatial evolution of deltaic Panther Tongue EODs was autogenically controlled by geographically distinct …
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Evolution and Architecture of an Incised Valley in the Upper Cretaceous Eagle Formation in South-Central Montana
… regressive-transgressive cycles deposited on the western margin of the Cretaceous Interior Seaway. This study focuses on the genesis of a regionally correlative basal incision surface and the subsequent fill architecture of the informal middle member of the Eagle Formation. Three stratigraphic …
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Evolution and Architecture of an Incised Valley in the Upper Cretaceous Eagle Formation in South-Central Montana
… regressive-transgressive cycles deposited on the western margin of the Cretaceous Interior Seaway. This study focuses on the genesis of a regionally correlative basal incision surface and the subsequent fill architecture of the informal middle member of the Eagle Formation. Three stratigraphic …
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The Aptian-Albian ironstone of the Rapid Creek formation, Little Fish Creek, NWT: implications for Cretaceous Ocean Anoxic Events and critical mineral deposits
… depression 50 km wide that connected the Western Interior Seaway to the nascent Arctic Ocean. The focus of this thesis is on the sedimentology and sequence stratigraphy of the Rapid Creek formation along Little Fish Creek, Northwest Territories. The Rapid Creek formation thins from ~1000 m …
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Depositional system and source rock potential of the Sharon Springs Formation in Colorado
… overall progradation of siliciclastics into the Western Interior Seaway. These units gradually decrease over time in calcite content associated with chalk filled fecal pellets, to clay and quartz dominated deposits with a large constituent of pyrite. This interval has the potential to be a …
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Paleoclimate Implications from Stable Isotope Analysis of Sedimentary Organic Carbon and Vertebrate Fossils from the Cedar Mountain Formation, UT, U.S.A.
… Member becomes much more humid as the Western Interior foreland basin, continues to subside, eventually becoming inundated by the Western Interior Seaway.</p> <p>The basal Cretaceous CMF sits unconformably atop the Late Jurassic Morrison Formation, with a hiatus of ~20 Ma (Kirkland and …
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Understanding topographic evolution of continents with landscape evolution simulations: the case of North America
… topographic fluctuations, from the Cretaceous Western Interior Seaway (WIS) to the present high elevations within the middle-western continent. The WIS produced widespread marine sediments in the continental interior, far (>500 km) from tectonically active regions. This region also largely …
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Cretaceous Amber: A New Source of Bird Remains and of Palaeoecological Information in Dinosaur Bonebeds
… investigates amber deposits in Myanmar and Western Canada, through chemical analyses of amber and study of the inclusions. As part of this work, I described a bird foot and a large series of feather inclusions from the amber of Myanmar. In the bird specimen, a series of osteological features …
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Controls on deposition, lithologic variability, and reservoir heterogeneity of prolific western interior shelf sandstone reservoirs: Tocito and El Vado sandstones, San Juan Basin, NM
The Tocito and El Vado Sandstones have proven to be highly prolific hydrocarbon reservoirs in the largest domestic onshore conventional gas basin in the U.S., the San Juan Basin (SJB). Application of modern drilling technology and favorable petroleum commodity prices have resulted in increased …
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Controls on the accumulation of organic matter in the Eagle Ford Group, Central Texas, USA.
The Upper Cretaceous Eagle Ford Formation is an organic rich marine mudrock which outcrops across central Texas. This study documents the chemostratigraphic character of the Pepper and Eagle Ford Formations in central Texas using major and trace elements, organic matter abundance, and the isotopic …