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Articles 121 - 130 of 130
Full-Text Articles in Geology
Emplacement Of Pleistocene Basalt Flows Near Mccoy, Colorado, Andrea Bowen
Emplacement Of Pleistocene Basalt Flows Near Mccoy, Colorado, Andrea Bowen
Electronic Theses and Dissertations
No abstract provided.
Fluctuations In Resistivity In The Tuscaloosa Marine Shale, Southwest Mississippi And Southeast Louisiana, Thomas Hetherington Story
Fluctuations In Resistivity In The Tuscaloosa Marine Shale, Southwest Mississippi And Southeast Louisiana, Thomas Hetherington Story
Electronic Theses and Dissertations
The Tuscaloosa Marine Shale in southwest Mississippi and Southeast Louisiana's Florida Parishes has become an unconventional target for the exploration and production of oil. Spurred by early estimates of over 7 billion barrels of oil in place, the target region for this production is the basal portion of the shale where a continuous increase in resistivity greater than 5 Ohmm can be observed. This increase was originally attributed solely to the generation of hydrocarbons from the organic matter contained within the shale, with the presence of the oil and gas impeding the flow of electrons through what would normally be …
The Urban Heat Island And Its Influence On Precipitation In Denver, Colorado, Diana Thunen
The Urban Heat Island And Its Influence On Precipitation In Denver, Colorado, Diana Thunen
Electronic Theses and Dissertations
Anthropogenic modification of the climate is an unintended yet serious effect of urbanization and it is happening in every city across the globe in the form of the urban heat island. The purpose of this study was to see if Denver, Colorado exhibits evidence of an urban heat island using meteorological data and if there has been a change in precipitation amounts since the urbanization of the city. It was concluded that Denver, Colorado does have an urban heat island that varies seasonally throughout the year with an average magnitude of 3.57°C during the day and 3.82°C at night. The …
Trophic State Monitoring Of Lakes And Reservoirs Using Remote Sensing, Michelle Aten
Trophic State Monitoring Of Lakes And Reservoirs Using Remote Sensing, Michelle Aten
Electronic Theses and Dissertations
Lakes and reservoirs are important resources that provide water for critical needs, such as drinking water, agriculture, recreation, fisheries, wildlife, and other uses. However, there is increasing concern that anthropogenic eutrophication threatens the usability of these natural resources. Therefore, this research investigates these complex hydrologic ecosystems and recommends a methodology for monitoring the trophic state of lakes and reservoirs using remote sensing data. The Mississippi Department of Environmental Quality provided in situ data for seven Mississippi lakes including, Arkabutla, Bay Springs, Enid, Grenada, Okatibbee, Ross Barnett, and Sardis lakes. This research explored the relationships between the Secchi depth (SD), chlorophyll-a …
Sediment Impact On The Formation Of Hypoxic Waters In The Northern Gulf Of Mexico: A Synthesis Of Sediment Texture, Composition, Erodibility And Transport, Rangley Claude Mickey
Sediment Impact On The Formation Of Hypoxic Waters In The Northern Gulf Of Mexico: A Synthesis Of Sediment Texture, Composition, Erodibility And Transport, Rangley Claude Mickey
Electronic Theses and Dissertations
Annual hypoxic events have been found to occur over the past several decades in the northern Gulf of Mexico (nGOM) and have prompted researchers to begin studying the mechanisms that control hypoxia formation so they may advise policy makers on the appropriate mitigating responses. This has led to the development of 3-dimensional modeling systems that incorporate marine physical, biological, geological, and chemical processes that may impact the formation and duration of hypoxic regimes in the nGOM. This study used field, laboratory, and modeling techniques to examine how sediment may be eroded from the seabed and where/how it is transported across …
Stratigraphy And Sedimentology Of The Smackover Formation, Southwest Alabama, Andrew Wilbourn
Stratigraphy And Sedimentology Of The Smackover Formation, Southwest Alabama, Andrew Wilbourn
Electronic Theses and Dissertations
The Smackover Formation is a highly productive producer of hydrocarbons throughout the United States Gulf Coast region. More than four million barrels of oil and five billion cubic feet of gas have been produced from the Smackover Formation in the Barnett Field in southwest Alabama. Paleohighs formed during the Paleozoic and salt tectonic relief features control sediment distribution of the Smackover Formation in southwest Alabama. The Smackover in Barnett Field is entirely dolomitized, but the carbonate texture at the time of deposition is still visible in thin section. The Smackover carbonates in Barnett Field were deposited in the near-shore area …
Calcite Cementation Of Sixty-Five-Year-Old Aragonite Sand Dredge Pile, Nathan M. Snyder
Calcite Cementation Of Sixty-Five-Year-Old Aragonite Sand Dredge Pile, Nathan M. Snyder
Electronic Theses and Dissertations
Dredging of the harbor at Stocking Island, Bahamas (23°31'45"N, 75°49'41"W) in 1942 produced four dredge piles of cross-bedded aragonite skeletal sand. The spoils piles are on the leeward (western) shore of the island, where they are subject to minimal wave energy. Collectively they are 350 x 50 m in plan view and 2 m high. The surface is very well cemented, which requires a hammer and chisel for sampling. Samples were collected from six sites at various locations of the dredge pile. Samples were analyzed for both chemical and physical properties using thin-section examination, X-ray diffraction, X-ray fluorescence, bulk density …
A Gis Investigation Of Regional Geologic Controls On Mercury Deposits In The Southwest Region Of Arkansas, Lindsey Carol Langsdon
A Gis Investigation Of Regional Geologic Controls On Mercury Deposits In The Southwest Region Of Arkansas, Lindsey Carol Langsdon
Electronic Theses and Dissertations
The mercury district of southwest Arkansas, located within Clark, Pike, and Howard counties, contains 77 mapped mercury deposits, primarily in the form of cinnabar, found within the sandstones and shales of the Stanley and Jackfork Formations. The geographic locations of the majority of the deposits tend to form an east-northeast alignment in map view. Utilization of Geographic Information Systems (GIS) tools provided insight to the regional controls on the spatial distribution of the mercury deposits by examining the proposed relationships between mercury deposits and regional faults or changes in lithology, both of which have been suggested (Clardy and Bush, 1976) …
Sequence Stratigraphy And Source Rock Characterization Of Organic-Rich Shales Within The Jurassic Smackover Formation, Conecuh Embayment, Alabama, U.S.A., Patrick W. Niemeyer
Sequence Stratigraphy And Source Rock Characterization Of Organic-Rich Shales Within The Jurassic Smackover Formation, Conecuh Embayment, Alabama, U.S.A., Patrick W. Niemeyer
Electronic Theses and Dissertations
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 Alabama revealed the presence of two black, siliciclastic shale layers containing abundant terrestrially derived organic matter within the Smackover Formation. The shale layers provide interesting insight into the sequence stratigraphy and paleoclimate of the Conecuh Embayment, and the source of the hydrocarbons accumulated there. The two shale layers reach a maximum thickness of 50 feet along the longitudinal axis of …
Impervious Surfaces Mapping Using High Resolution Satellite Imagery, Tahmina Shirmeen
Impervious Surfaces Mapping Using High Resolution Satellite Imagery, Tahmina Shirmeen
Electronic Theses and Dissertations
In recent years, impervious surfaces have emerged not only as an indicator of the degree of urbanization, but also as an indicator of environmental quality. As impervious surface area increases, storm water runoff increases in velocity, quantity, temperature and pollution load. Any of these attributes can contribute to the degradation of natural hydrology and water quality. Various image processing techniques have been used to identify the impervious surfaces, however, most of the existing impervious surface mapping tools used moderate resolution imagery. In this project, the potential of standard image processing techniques to generate impervious surface data for change detection analysis …