Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
After decades of research biogeochemists have identified several intervals of variable marine oxygenation throughout Earth's history. These fluctuations in oxygenation have been proposed to directly correlate to changes in ancient...
Applications of Calcareous Nannofossils and Stable Isotopes to Cenozoic Paleoceanography: Examples from the Eastern Equatorial Pacific, Western Equatorial Atlantic and Southern Indian Oceans
This dissertation is a collection of five calcareous nannofossil and one stable isotope studies on materials from Ocean Drilling Program (ODP) Legs 183 (Site 1135), 206 (Site 1256), and 207 (Site 1259) that target two important...
A data assimilation method is developed to calibrate a heterogeneous hydraulic conductivity field conditioning on observation of a transient groundwater flow field or transient conservative solute transport field. An ensemble Kalman...
Investigations of the Ecology of Calcareous Nannoplankton and Nannofossils in the North-East Gulf of Mexico to Help Establish a Baseline for Environmental Impact Studies
This study presents for the first time, ecological relationships between coccolithophores and environmental conditions in the northeastern Gulf of Mexico. Cell densities of coccolithophores were determined in 598 samples taken from...
The Silurian was a dynamic time of climatic transition punctuated by multiple biotic crises and global carbon cycle perturbations. The most severe of these biotic crises was the late Silurian (Ludfordian) Lau/Kozlowskii extinction event ...
The recent reports of methane in the atmosphere of Mars, as well as the findings of hypersaline paleoenvironments on that planet, have underscored the need to evaluate the importance of biological (as opposed to geological) trace gas...
In groundwater modeling, the term "post audit" refers to a method of verifying simulated (predicted) data produced by a groundwater model against analogous measured data. According to Anderson et. al., (2015), evaluation of model...
Lake Jackson in Leon County Florida is a shallow perched dissolution lake, which sits above the Cody Scarp and is formed from the coalescence of sinkholes. Lake Jackson currently has two open sinkholes, Porter Sink and Lime Sink....
Utilizing Indian Ocean Calcareous Nannofossil Biostratigraphy of Miocene Sediments to Investigate Tectonic and Climatic Forcing during the Evolution of the Himalayas
The geological history of Himalayans and Tibetan Plateau is important for understanding how our planet evolves, and how geological structures can have local and global effects on climate and floral and faunal evolution of a system. This...
High-Resolution Calcareous Nannofossil Biostratigraphic Applications: Examples from the Upper Cretaceous Southern Ocean (ODP Leg 183) and Paleocene Equatorial Atlantic (ODP Leg 207)
This dissertation is a collection of high-resolution calcareous nannofossil biostratigraphic projects. The projects are from Ocean Drilling Program (ODP) Leg 183 to the Kerguelen Plateau (Hole 1138A) and ODP Leg 207 to the Demerara Rise, ...
The environmental impacts of COVID-19 and the “new normal” of working from home are being explored in the scientific community. However, there is currently no published study on the COVID-19 impacts to nitrate load via septic systems....
Investigation and Interpretation of Variations in NE Gulf of Mexico Nannoplankton Assemblages Following the Macando Well Blowout: Months of August-November
The biodiversity and biomass of coccolithophore species observed in the NE Gulf of Mexico during the months of August through November from 2011 to 2013 are quite dynamic. Following the Macondo well blow out in 2010, analyses have been...
Modern (farmed) calcite in Hollow Ridge Cave, Marianna, FL, USA was cultivated seasonally and analyzed for isotopic composition (δ18O and δ13C). Simultaneous in situ cave-air chemistry, drip water composition, and micrometeorology were...
Quantifying the Effects of Increased Storminess and Sea-Level Change on the Morphology of Sandy Barrier Islands along the Northwestern and Atlantic Coasts of Florida
The ability to accurately quantify shoreline variability along sandy beaches is essential in order to establish aggressive mitigation strategies, based on recent global climate change projections. This investigation employed a suite of...
The Brazos River area is located at the entrance of the former Western Interior Seaway on the shallow northern Gulf of Mexico shelf. Marine sediments in the region were deposited in a middle to outer shelf environment. Outcrops on the...
Nitrates (NO3- ) are one of the principal contaminants in ground water. Excess nitrate in ground water is known to cause serious illnesses such as methemoglobinemia, and cancer. In addition to the adverse impact on the health of humans, ...
A mercury isotope technique was developed using a Neptune Multi Collector Inductively Coupled Mass Spectrometer (MC-ICPMS) in low resolution mode. The amount of sample used was approximately 10 nanograms of Hg and the external precision...
Calcareous nannofossils are used as biostratigraphic indicators integral for age control in both petroleum industry and academic settings. The Oligocene and Late Cretaceous are especially problematic for nannofossil biostratigraphers due...
High Resolution Microclimate Study of Hollow Ridge Cave: Relationships Between Cave Meteorology, Air Chemistry, and Hydrology and the Impact on Speleothem Deposition
Long term, near continuous, in situ monitoring of cave meteorology, cave aerochemistry, and surface meteorology allows quantitative assessment of cave ventilation and the effect on CO₂ outgassing from cave systems. Because advances in...
The use of chemical tracers to understand ecosystem interactions in the marine environment has gained increasing popularity over the past three decades. Carbon isotope abundances in organic matter sources in the marine system vary...
Calcareous Nannoplankton as Paleoceanographic and Biostratigraphic Proxies: Examples from the Mid-Cretaceous Equatorial Atlantic (ODP Leg 207) and Pleistocene of the Antarctic Peninsula (NBP0602A) and North Atlantic (IODP Exp. 306)
This dissertation is a collection of three projects utilizing calcareous nannoplankton as biostratigraphic and paleoceanographic indicators. The materials studied come from three locations: 1) Ocean Drilling Program (ODP) Leg 207 (Site...
As the Arctic warms, the ~277 Pg of carbon stored in permafrost peatlands faces an uncertain fate. Arctic and Subarctic peatlands are likely to release more methane (CH4) as permafrost thaw releases formerly-frozen carbon, thaw-induced...
ABSTRACT The Ocean Drilling Program (ODP) Leg 154 in the western equatorial Atlantic cored Paleocene - Holocene strata at Site 929 on the Ceara Rise. The calcareous nannofossil biostratigraphy of the Oligocene - lower Miocene sequence at...
The Deepwater Horizon (DWH) blowout of 2010 released an estimated 4.5-4.9 million barrels of oil and 500, 000t of methane into the Gulf of Mexico (GOM). Some of this oil rose to the surface, forming oil slicks, while an estimated 30% of...
The Biogeochemical Cycle of Mercury in the Northern Gulf of Mexico as Constrained by Carbon, Nitrogen, Sulfur, and Mercury Isotopic Ratios in Marine Fish
Mercury (Hg) in the environment has deleterious ecological and health affects for humans and wildlife and is primarily transferred to humans through the consumption of marine biota (USEPA, 2001). These ecological and health concerns are...
Dissolved organic matter (DOM) is well known for its strong binding capacity for trace metals. In order to better predict the role of DOM in the speciation and transport of trace metals in the environment capillary electrophoresis (CE), ...
The tectonic separation of Australia from Antarctica is a key constraint on the development of the Antarctic Circumpolar Current (ACC) during the Cenozoic. The ACC plays a critical role in global climate thermally isolating Antarctica...
The foredunes at twenty locations on Santa Rosa Island, Florida have been eroded to varying degree in response to Hurricanes Opal (1995), Ivan (2004) and Dennis (2005). At locations where pre-storm foredunes were high and the island was...
The Silurian was a period characterized by rapidly fluctuating climate, multiple biotic turnover events, and eustatic sea-level variability. The Homerian Mulde biotic event (late Wenlock), ~428Ma, lies between the Sheinwoodian (early...
This study investigates the effects of geological structure of the aquifers and the chemistry of water by testing the water chemistry variation such as the main cations (Na+, K+, Ca2+, Mg2+) and anions (Cl-, SO4 2-, HCO3 -) and TDS from...
The present study deals with the stratigraphy and petrography of the Upper Cretaceous through Paleocene carbonate sequence obtained from a deep well located in Polk County, Florida. Subsurface stratigraphy was measured and described at...
This dissertation implements three studies related to understanding the impacts of groundwater-surface water interactions on both the aquatic geochemistry and water quantity of karst spring systems. The first study examined aquifer and...
The late Silurian was a turbulent era, with widespread environmental, biotic, and oceanographic variability. Major climatic and palaeoceanographic oscillations are often associated with faunal reorganizations and extinction events, and...
Salt marshes provide an important habitat for animals and food for fish, shellfish, birds and mammals. They also serve as a breeding ground and nursery for numerous species. The value of salt marshes lies in the benefits that it provides...
Molecular analysis of absorbed organic residues from Middle Formative period feasting ceramics from the Olmec site of San Andrés in Tabasco, Mexico, demonstrates the use of traditional Mesoamerican special feasting foods and beverages as...
Lithostratigraphy, Depositional Environment and Diagenetic History of the Lower and Upper Cretaceous Section of TEC DIWS-1 Deep Well, Polk County, Florida
The lithostratigraphy, depositional environment, and diagenetic history of the Lower and Upper Cretaceous rocks have been studied from TEC DIW-1 deep well drilled in the Polk County, Florida. A total of 47 samples were obtained from the...
Pliocene-Pleistocene Calcareous Nannofossil Biostratigraphy of IODP Hole 1396C Adjacent to Montserrat Island in the Lesser Antilles, Caribbean Sea, Plus Experimentally Induced Diagenesis
Integrated Ocean Drilling Program Hole 1396C, adjacent to Montserrat Island, provides a lower Pliocene to Pleistocene record of calcareous nannofossil assemblages (CN11 to CN15). The nannofossil assemblages are generally common to...
This dissertation presents biostratigraphic, taxonomic and paleoceanographic studies of sediment cores from low-latitude Ocean Drilling Program (ODP) Legs 154 (Site 929), 115 (Site 709), and 202 (Site 1237). Three major paleoceanographic...
As a global pollutant and a metal toxic to living organisms, mercury is one of the most environmentally studied elements. The mercury cycle is a complex phenomenon due to transformations in various media and exchange between them. Thus, ...
In recent years, high-resolution seismological studies have documented anomalously low shear wave velocity in the middle of the lithosphere, referred to as mid-lithospheric discontinuity (MLD). In contrast to the low seismic velocity, ...
Paleoclimatic data including orbital eccentricity, mollusk species counts and carbonate isotope data are combined in an event based, time synchronized, parameter mapped sonification that plays backwards through geologic time from ~3.2...
Concurrent with the rapid increase in population on Earth in recent centuries has been an increase in fossil fuel combustion, clearing of land and burning (slash and burn agriculture), as well as increasing natural wildfires, all of...
Biostratigraphy and Comparison of Paleocene to Lower Eocene Calcareous Nannofossils from Broken Ridge and Ninety-East Ridge: Ocean Drilling Program Leg 121, Sites 752 and 758
Ocean Drilling Program Site 752 on Broken Ridge in the Indian Ocean recovered an expanded section containing Paleocene and lower Eocene calcareous nannofossils. Qualitative counts show a diverse, high-latitude assemblage of primarily...
Archaeological excavations in Florida have recovered numerous specimens of megafauna over the past decades. A sample of these specimens have been subject to carbon and oxygen stable isotope analysis to determine individual diet and water...
Paleotempestology is the study of long-term regional storm history from geological proxy evidence. This relatively recent field of geology offers a glimpse at tropical cyclone activity extending back into geologic time. Historic...
The cardinal role of the atmosphere in the global dispersion of mercury and its deposition in aquatic environments and on land is well established. Re-emission of mercury from waters and land is the major source of atmospheric mercury....
After the Deepwater Horizon (DWH) blowout, MC252 crude oil was washed onto the shores of the northeastern Gulf of Mexico. Weathered oil was buried in sandy Florida beaches in the form of sands covered by oil films, small oil particles, ...
Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
