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Showing 1 to 16 of 16 for “"Mississippi Embayment"”.
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Estimation of Non-Linear Seismic Site Effects for Deep Deposits of the Mississippi Embayment
The second part of the thesis describes the probabilistic seismic hazard analysis with non-linear site effect performed in the ME to develop site coefficients. Current site coefficients, proposed in National Earthquake Hazard Reduction Program (NEHRP), are used with USGS hazard maps to develop site …
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Geochemistry, Thermochronometry, Petrogenesis, and Geometry of Igneous Dikes in Central Arkansas: Implications for Mississippi Embayment Evolution
The Mississippi Embayment (ME) is a south-plunging sedimentary basin which unconformably overlies the Cambrian Mississippi Valley Graben (MVG) and serves as a natural laboratory for extensional tectonics. The Arkansas Alkaline Province (AAP) lies along the ME’s western border in central Arkansas …
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Cost-Savings of Implementing Site-Specific Ground Motion Response Analysis in Design of Mississippi Embayment Bridges
<p>Deep dynamic site characterization and a site-specific ground motion response analysis (SSGMRA) were conducted for a bridge site in Monette, Arkansas. The SSGMRA indicated the design acceleration response spectrum determined using the American Association of State Highway and Transportation …
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Seismic Site Response and Extraction of Dynamic Soil Behavior From Downhole Array Measurements
… of deep unconsolidated deposits in the upper Mississippi Embayment has an important impact on anticipated surface motions. PSHA-NL, probabilistic seismic hazard analysis with nonlinear site effects, can be used to estimate seismic hazard with the effect of deep deposits. This thesis extends …
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Development of Deep Shear Wave Velocity Profiles and an Approach to Generate Site Signature Consistent Pseudo Shear Wave Velocity Profiles in the Mississippi Embayment
… applying this technique at 24 sites across the Mississippi embayment and developing an approach to generate pseudo site signature consistent VS profiles from velocity functions and fundamental frequency. In the presented SWM technique, active and passive source surface wave measurements are …
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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 Late Cretaceous Mississippi Embayment includes some of the most complete, well-preserved mosasaur specimens in the world. Here I investigate the paleobiology of these extinct swimming lizards through schlerochronological analysis of fossil teeth with unparalleled temporal resolution. By …
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Identification of seismically-induced landslippage along Crowley's Ridge, southeast Missouri and northeast Arkansas
… upland over 380 km long within the upper Mississippi Embayment. Crowley's Ridge was subjected to over 2,000 felt earthquakes during the 1811-1812 New Madrid earthquake sequence, including at least three events with Ms > 8.0. Crowley's Ridge was not settled at the time of the earthquakes, …
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Osteology, Morphometrics, and Phylogenetic Systematics of the ‘Booneville Dinosaur’ (Ornithopoda: Hadrosauridae) From the Early–Middle Campanian Coffee Formation of Northeastern Mississippi
<p>The non-avian dinosaur fossil record of Mississippi includes members of the clades Hadrosauroidea, Nodosauridae, Tyrannosauroidea, Ornithomimidae, Dromaeosauridae, and Ceratopsia. These members are represented only by non-articulated usually isolated elements, deposited in the marine and …
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Stratigraphy and Depositional Characterization of the Moorefield Shale (Middle-Late Mississippian) in its Type Area, Northeastern Arkansas (Eastern Arkoma Basin)
… in northern Arkansas. Lying on the margin of the Mississippi Embayment and Reelfoot Rift, sequence stratigraphic interpretations have labelled the Moorefield Shale a lowstand wedge succeeding the Early Mississippian (Osagean) Boone Limestone conformably and overlain conformably by the Hindsville …
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The Influence of the North Atlantic Subtropical High on Atmospheric Rivers Over the Eastern United States
… and higher mean AR-driven precipitation over the Mississippi embayment and Ohio River Valley in the summer months, believed to be representative of extreme moisture transport events, when the NASH exhibits increased intensity, spatial expansion, and southwestward migration. Conversely, AR …
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Carbon Cycle Trends Recorded By Organic Carbon Stable Isotopes In Paleocene Strata, Benton County, Mississippi: Implications For Chronostratigraphy Of The Porters Creek And Naheola Formations
… is contained in the sedimentary fill of the Mississippi embayment so there is high potential to produce new petm stable isotope datasets. The purpose of this project is to analyze the boundary for evidence of the petm and other cies at the flat rock church paleobotanical site and a nearby …
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A GIS Approach to Modeling Groundwater Levels in the Mississippi River Valley Alluvial Aquifer
… challenges for the Arkansas Delta region. The Mississippi River Valley Alluvial Aquifer is the uppermost aquifer and features the largest groundwater capacity in the Mississippi Embayment Aquifer System. The Mississippi River Valley Alluvial Aquifer, commonly referred to as the “alluvial …
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Patterns and processes of speciation in North American chorus frogs (Pseudacris)
… events, I find that marine inundation of the Mississippi Embayment may have caused speciation in this group. Additionally, I find that climatic events led to reduced genetic variation rather than divergence within species. In chapter 4, I study the evolution of acoustic signals of all species …
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Frequency- and pressure-dependent dynamic soil properties for seismic analysis of deep sites
… and attenuation, a 1-km deep model for the Mississippi embayment near Memphis, Tennessee, is successfully analyzed. The seismograms computed at the surface not only satisfy causality (which cannot be taken for granted when using frequency-dependent parameters), but their spectra contain the …
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Human mediated physical and virtual water transfers of the United States: Who uses the water?
… groundwater transfers from the overexploited Mississippi Embayment, High Plains, and Central Valley aquifer systems in the United States to their final destination. Specifically, we determine which US metropolitan areas, US states, and international export destinations are currently the …
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Microtremor recordings in Northern Mississippi: Evaluating site effect and correlating with wave climate
… condition. The main research area, Northern Mississippi, is located in Mississippi Embayment (ME) where is mainly composed of unconsolidated sediments which can be as thick as 1400m along the Mississippi River floodplain, and is favorable to have significant site effects. Meanwhile Northern …