Browsing Dissertations & Theses by Title
Now showing items 162-181 of 201
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Seismic Analysis and Petrophysical Evaluation of the Pennsylvanian Rasberry Reef Phylloid Algal Carbonate Mounds in the Knox-Baylor Trough, Knox County, Texas
(2018-02-27)The Ellis Ranch Wildcat field in Knox County, Texas produces from an isolated carbonate platform located on the northern flank of the Knox-Baylor Trough. The platform is composed of the Desmoinesian aged Caddo Limestone ... -
Seismic Inversion In Fluvial Reservoirs: Building A Geologic Model-based Inversion For The Stratton Field 3D Survey
(Geology, 2010-03-03)Seismic surveys, in particular 3-D surveys, are an important tool for imaging geologic structure in the subsurface; they are routinely applied to map structural trends and geometry to define the reservoir structure. Many ... -
Selenium Speciation Along A Groundwater Flow Path In The Carrizo Aquifer, Southeastern Texas, USA
(Geology, 2007-08-23)Selenium concentration and speciation [Se (VI), Se (IV) and Se (-II)] was determined along a flow path in the Carrizo Sand aquifer (southeastern Texas). Groundwater sampling was carried out in March 2006, from ten wells ... -
SENSITIVITY OF OXYGEN MINIMUM ZONES DUE TO CARBON DIOXIDE RADIATIVE FORCING USING CESM 1.2
(2019-04-25)Anthropogenic-induced climate change is occurring at an unprecedented rapid rate, compared to the geologic past. In this study, CO2 stabilization scenarios (1x, 2x, and 4x preindustrial atmospheric pCO2 levels) utilizing ... -
Sensitivity Of The Late Permian Climate To Tectonic And Radiative Forcing Changes: Implications For The Mass Extinction
(Environmental & Earth Science, 2014-12)The largest mass extinction occurred near the Permian-Triassic boundary (ca. 252 Ma). Significant carbon isotope shifts indicate that perturbations in the carbon cycle occurred during the Late Permian and persisted into ... -
Sensitivity of the Younger Dryas climate to changes in freshwater, orbital, and greenhouse gas forcing in comprehensive climate models
(2016-05-11)The Younger Dryas cooling event (~12,900 years before present) was the most recent abrupt climate change in the geologic record where climate for the Northern Hemisphere returned to a near-glacial state. The cause of this ... -
SHALE GAS/OIL RESERVOIR CHARACTERIZATION AND MATURITY DETERMINATION BASED ON VARIOUS EXPERIMENTAL ANALYSES
(2019-05-31)Despite the successful shale hydrocarbon exploration and production in the U.S. started about 20 years ago, the producing wells experience a current low total recovery of tight oil (5%-10%) and shale gas (12%-30%). One of ... -
Simulation Of Climate Across the Permian-Triassic Boundary with a Focus on Phytogeographical Data Analysis
(2018-12-06)The present study aims at reconstructing the paleoclimate across the Permian-Triassic Boundary (PTB, 251.9 ± 0.024 Ma) which encompasses one of the major mass extinction events of the Earth’s history. Results are analyzed ... -
Source Characterization Of African Soils Using Computer Controlled Sem Analysis
(Environmental & Earth Science, 2014-12)An investigation is underway to determine whether African dust can be chemically distinguished by regions and whether it is developed through Pedogenic or Aeolian processes. A total of 29 dust samples were taken from the ... -
Southern Illinois Paleoclimate Determined From Variations In Iron Oxide Content
(Geology, 2008-08-08)Diffuse reflectance spectroscopy was used to determine the relative abundance of the iron oxides hematite and goethite in a loess and paleosol sequence from an unglaciated area of southern Illinois. Factor analysis of ... -
Spatio-Temporal Analysis of Asthma Hospitalizations and Associated Factors in Eastern Texas, 2005-2012
(2019-12-09)The prevalence of asthma is increasing for both adult and children in eastern Texas. This study examines the spatial and temporal differences in asthma hospital discharge rates and its association with socioeconomic risk ... -
Spatio-temporal Variations In Asthma Hospitalizations In Texas 2005-2011 By County And Possible Association With Ozone Exposure
Texas asthma hospitalization data at the county level has been reviewed for the period 2005-2011. Exploratory data analysis revealed a general countywide reduction in the number of hospitalizations over this time period. ... -
⁸⁷Sr/⁸⁶Sr AS A POTENTIAL FINGERPRINT FOR DETERMINING THE PROVENANCE OF TOTAL DISSOLVED SOLIDS ASSOCIATED WITH HYDRAULIC FRACTURING ACTIVITIES IN THE BARNETT SHALE, TEXAS
(2016-05-11)Over the last decade there has been a dramatic increase in unconventional drilling that utilizes hydraulic fracturing to extract oil and gas. The Barnett Shale in north central Texas has been a significant contributor to ... -
Stable isotope composition of surface water across central Mexico
(2020-12-09)Understanding the controlling factors of modern surface water stable isotope compositions is important for reconstructions of paleoclimate and paleoelevation. Few studies have attempted to understand patterns of surface ... -
Stable Isotopic And Geochemical Studies Of Late Quaternary Stalagmites, South-Central Appalachian Mountains, Eastern North America
(Environmental & Earth Science, 2014-07-14)A tripartite investigation was conducted utilizing speleothem geochemistry and modern cave environments: reconstruction of paleoclimate variability in southeastern West Virginia that spans the late Pleistocene to mid-Holocene, ... -
Statistical Analysis Of Rock Fabrics
(Geology, 2007-08-23)The main goal of the work is to present new procedures for statistical analysis of fabric data for structural geology. After an introduction to the problems of orientation analysis, discussion of different types of the ... -
Studies of the Performance, Stability and Reliability of Various Configurations of the Activated Sludge Process at Full-Scale Municipal Wastewater Treatment Plants
(Engineering, Environmental, 2009-05-15)This research presents a performance, stability and reliability analysis of five configurations of activated sludge process, viz., conventional, contact stabilization, complete mix, extended aeration and sequencing batch ... -
A Study Of Ecological And Physiological Roles Of The Termite Associated Verrucomicrobium (TAV) Strains Through A System Biology Approach
(Environmental & Earth Science, 2013-07-22)Termite hindguts are populated by a dense and diverse community of microbial symbionts working in concert to transform lignocellulosic plant material and derived residues into acetate, to recycle and fix nitrogen, and to ... -
The Subsidence Evolution Of The Fort Worth Basin In North Central Texas, U.S.A.
(Environmental & Earth Science, 2014-09-17)Although the Fort Worth Basin in north-central Texas has become a major shale-gas production system in recent years, its subsidence history and dynamic relationship to the Ouachita fold-and-thrust belt have not been well ... -
Surface Lineaments And Lithofacies Distribution Of The Tyler Formation In Southwestern North Dakota
(Geology, 2012-07-25)The purpose of this study is to investigate whether a correlation exists between surface lineaments and lithofacies distribution of the Pennsylvanian Tyler Formation in the southwest portion of North Dakota of the Williston ...