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Evaluating The Relationship Between Methane Seeps And Seafloor Geomorphology On The Northern Us Atlantic Margin, Gabriel Hernandez
Evaluating The Relationship Between Methane Seeps And Seafloor Geomorphology On The Northern Us Atlantic Margin, Gabriel Hernandez
Theses and Dissertations
Methane seeps are a transport pathway for carbon from seafloor sediments to the marine environment with important implications for global biogeochemical cycling. Accordingly, there is substantial interest in better understanding the processes that control seep location and predicting the distribution of seeps with existing seafloor datasets. Visual evaluation of methane seeps, in multibeam sonar water column data, suggests a spatial relationship between seeps and specific seafloor morphologic features such as ridge crests. In this thesis, seafloor geomorphology at 1996 seep detection sites on the US Atlantic margin was quantitatively characterized by geomorphologic phonotype, bathymetric position index, slope, rugosity, and aspect …
National Register Of Historic Places Evaluations Of Sites Wo2 And Wo5 On The Tusquitee Ranger District, Nantahala National Forest, Cherokee County, North Carolina, James Caleb Hutson
National Register Of Historic Places Evaluations Of Sites Wo2 And Wo5 On The Tusquitee Ranger District, Nantahala National Forest, Cherokee County, North Carolina, James Caleb Hutson
Theses and Dissertations
Following the unauthorized ground disturbance at two undiscovered Early/Middle Archaic sites (WO2 and WO5) within the Trail of Tears protective corridor on the Nantahala National Forest, NC, archaeological investigations undertaken have yielded data potentially important to the understanding of early inhabitants in the Appalachian Summit region. Archaeological investigations at sites WO2 and WO5 have shown that both sites have single occupations as evidenced by statistical analysis of data collected. Also, the two sites have minimal disturbance based on statistical analyses of the dip and strike data of piece-plotted artifacts at the two locales. The thesis outlines the work done at …
Easily Overlooked: Modelling Coastal Dune Habitat Occupancy Of Threatened And Endangered Beach Mice (Peromyscus Polionotus Spp.) Using High-Resolution Aerial Imagery And Elevation Models Of The Northern Gulf Of Mexico, Wesley Burger
Theses and Dissertations
The Gulf of Mexico dune system is a broad and dynamic environment that varies greatly in geomorphology and vegetative composition across the Gulf coastline. Beach mice (Peromyscus polionotus spp.) are an endangered species that rely on coastal habitat structure. I hypothesized that beach mouse occupancy would be dependent upon coastal dune land cover and landform features. I identified coastal landforms using high-resolution elevation data and landform models in GRASS GIS and identified coastal dune vegetation classes using high-resolution aerial imagery and object oriented vegetation classification. These features were used to create a dynamic occupancy model to determine occupancy patterns in …
Morphometric Differentiation Of Flank Margin Caves And Littoral, Or Sea Caves, Willapa James Waterstrat
Morphometric Differentiation Of Flank Margin Caves And Littoral, Or Sea Caves, Willapa James Waterstrat
Theses and Dissertations
Caves on carbonate islands are useful indicators of past sea level because cave formation is dependent on sea-level controlled freshwater lens position (flank margin caves), or form in direct contact with coastal processes (sea caves). Sea-level curves present a useful proxy for glacioeustatic and paleoclimate studies, so caves offer useful data. Once a flank margin cave is breached, it may be modified and eroded by waves. This overprinting leads to morphology similar to that of sea caves. While both indicate past sea level, they reveal differing information about the amount of denudation that has occurred to expose them (a paleoclimate …