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Showing 1 to 20 of 21 for “"Sedimentary strata"”.
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Tectonics of the Uinta Recess in the Sevier Fold-Thrust Belt, Utah
… marked an abrupt change in the thickness of the sedimentary basin in which the fold-thrust belt formed. Basin geometry, in turn, was affected by reactivation of a long-lived basement fault system. Abrupt thickening of sedimentary strata to the south of this fault zone led to the development of …
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Cenozoic Sedimentary Evolution of the Helmville Basin, West-Central Montana
… Glenn, M.S., Spring 2008 Geosciences Cenozoic Sedimentary Evolution of the Helmville Basin, West-Central Montana Chairperson: Marc S. Hendrix The Helmville basin is an intermontane topographic depression located ~100 kilometers east of Missoula, Montana. The basin occurs within the Rocky …
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Cenozoic Sedimentary Evolution of the Helmville Basin, West-Central Montana
… Glenn, M.S., Spring 2008 Geosciences Cenozoic Sedimentary Evolution of the Helmville Basin, West-Central Montana Chairperson: Marc S. Hendrix The Helmville basin is an intermontane topographic depression located ~100 kilometers east of Missoula, Montana. The basin occurs within the Rocky …
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Hydrogeologic Model of a Leachate Plume in an Unconfined Coastal Plain Aquifer and Chemical Transport Mechanisms of Metals and Dense Non-Aqueous Phase Liquids
… Province. The area includes undeformed detrital sedimentary strata of Upper Cretaceous age, formed in coastal and marine environments. Three stratigraphic formations are present at the study area: the Tuscaloosa Formation, the Eutaw Formation and the Blufftown Formation. A three-dimensional …
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Study of seismic reflection data over Virginia Mesozoic basins
… 2700 m. The Scottsville Basin contains sedimentary strata with a thickness of 1750 m and the seismic data from the Toano Basin indicate a thickness of 3000 m. The compressional wave velocity of the strata within these basins has a range of 4000-5300 m/sec.
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Critical assessment of a proposed biostratigraphic scheme for Late Triassic fissure sediments from South West England
… correlatable Late Triassic/Early Jurassic strata. Vertebrate fossil material from Cromhall Quarry, recovered as part of an extended project centered on Late Triassic fissure infillings in southwestern Britain, was organized into a biostratigraphic scheme in 1993. This scheme could prove …
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A ocorrência de lagartos marinhos (Mosasauridade: Lepidosauria) e sua associação faunística no cretáceo da bacia Pernambuco - Paraíba, Nordeste do Brasil
… about the Brazilian mosasaurid taxóns. The sedimentary strata containing the studied fauna are characterized and a summary of the information available in the scientific literature is presented, including new data obtained during the field work. Geopaleontological aspects concerning the …
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Geochemistry and Basin Analysis of Laramide Rocky Mountain Basins
… and isotope paleoaltimetry of early Eocene sedimentary strata to constrain the tectonic setting, paleogeography and paleoclimate of the Wind River basin. Annual and seasonal variation in ancient riverwater δ¹⁸O reconstructed from shell fossils shows that the Canadian Rocky Mountains was …
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The reprocessing and extended interpretation of seismic reflection data recorded over the Hayesville-Fries thrust sheet in southwestern North Carolina
… thrust stacking of thin beds of Paleozoic shelf strata. The reprocessed data are used to determine a more unique depth domain geometry for one of the proposed duplexes. Reprocessed data are partially improved through an increase in both stacking velocity coverage and datum statics velocity …
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An aqueous geochemical and hydrologic study of the springs and wells of the Sevilleta National Wildlife Refuge : evaluating hydrochemical pathways
… while others have proposed that upwelling sedimentary basin brines at interbasin constrictions represent a significant salinity input to the modern Rio Grande. This study (a) provides the first hydrochemical data on a comprehensive suite of springs and wells, and (b) tests and refines …
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Stratigraphy and Tectonics: Multi-Disciplinary Evaluation of Tectonic Models For the Eastern and Southern Continental Margins of North America
<p>The links between sedimentary strata, their source regions and accommodation mechanisms enable the testing of tectonic models across a range of temporal and spatial scales. This dissertation presents three studies that interpret the stratigraphic architecture and sediment provenance records of …
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Laramide transpression and oblique thrusting in the northeastern Front Range, Colorado: 3D kinematics of the Livermore Embayment
… basement and upper Paleozoic and Mesozoic sedimentary strata. Kinematic data, bedding attitude data (n=1048), time- and depth-structure contour maps from proprietary seismic data, and depths of formation tops from >100 wells were used to constrain 18 balanced cross sections and a 3D …
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The Midcontinent exposed: Precambrian basement topography, and fault-and-fold zones, within the cratonic platform of the United States
… buried the region with sequences Phanerozoic sedimentary strata. The continent-wide contact between Precambrian crystalline rock and the overlying cover of Phanerozoic strata is known as the ""Great Unconformity."" Though the cratonic platform has been relatively stable, tectonically, for over …
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Non-traditional sources of critical minerals from the Western Canada Sedimentary Basin
… non-traditional sources of the Western Canada Sedimentary Basin (WCSB) with a focus on REE from coal combustion by-products (CCBs) and Li from basinal brines. The first phase of this work used machine learning to identify geochemical indicators of REE enrichment in sedimentary strata which can …
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Seismicity and structure of the eastern Gawler Craton and Lake Eyre region
… pronounced intraplate seismic activity and thick sedimentary cover that potentially obscures the elusive boundary between older Proterozoic and younger Phanerozoic eastern Australia. Despite this, the area had limited seismic data coverage due to its remoteness and the harsh arid climate, creating …
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Triassic to Neogene Evolution of the Andean Retroarc: Neuquén Basin, Argentina
… Basin and preserve Upper Jurassic to Miocene sedimentary rocks, which record the earliest phase of shortening at this latitude. This study presents new sedimentological and detrital zircon U-Pb data from the Jurassic to latest Cretaceous sedimentary strata to determine depositional …
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Seismicity and structure of the eastern Gawler Craton and Lake Eyre region
… pronounced intraplate seismic activity and thick sedimentary cover that potentially obscures the elusive boundary between older Proterozoic and younger Phanerozoic eastern Australia. Despite this, the area had limited seismic data coverage due to its remoteness and the harsh arid climate, creating …
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Geochemical investigation of the co-evolution of life and environment in the Neoproterozoic Era
… oceans. Further, a compilation of Proterozoic sedimentary δ<sup>15</sup>N data, together with box model simulations, suggest a ~50% increase in marine nitrate availability at ~800 Ma. Limited nitrate availability in early Neoproterozoic oceans may have delayed the ecological rise of eukaryotes …
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The role of wind and water in shaping earth's plateaus
… (3) finally, a 2.5-km-long Mio-Pliocene sedimentary record of the intermontane Angastaco Basin (25°45’ S, 66°00’ W) is presented in the context of hydrogen and carbon compositions of molecular lipid biomarker, and oxygen and carbon isotopes obtained from pedogenic carbonates; these …
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Geological and structural analysis of the Hwange area-Northwest Zimbabwe: using remotely sensed data and geographic information systems (GIS)
… kinematic indicators such as displacement of sedimentary strata have shown that the Entuba fault displays right lateral strike-slip coupled with dipslip movement. Proximity analysis using borehole data (depth to top and bottom of a coal seam) showed that most of the lineaments in the area are …
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