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Articles 1 - 7 of 7
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Geochemical Investigation Of Monogenetic Volcanoes From The Pribilof Islands, Bering Sea, Alaska, Clayton L. Reinier
Geochemical Investigation Of Monogenetic Volcanoes From The Pribilof Islands, Bering Sea, Alaska, Clayton L. Reinier
MSU Graduate Theses
Small-volume basaltic magmas found at continental intraplate environments have not been as extensively studied compared to their polygenetic counterparts. Specifically, regions such as the Bering Sea basalt province, described as a diffuse igneous province, have commonly been overlooked. Assumptions that these systems are invoked by simple, single batches of magma has subsequently left a gap in understanding the processes responsible for primary magma generation away from plate boundaries with little tectonic influence. The following studies that constitute this thesis focus on an in-depth geochemical investigation at the crystal and sub-crystal scale to evaluate lithospheric mantle heterogeneities, processes that govern primary …
Historical Changes Of Channel Width In A Headwater Stream System, Mark Twain National Forest, Missouri, Sierra N. Casagrand
Historical Changes Of Channel Width In A Headwater Stream System, Mark Twain National Forest, Missouri, Sierra N. Casagrand
MSU Graduate Theses
It is well known that watershed disturbances due to land clearing and agricultural settlement during the early 1800s changed the hydrology and geomorphology of stream systems in the Midwestern USA. However, little is known about the impacts of historical logging on stream systems in forested watersheds. This study evaluates channel width measurements from 38 General Land Office (GLO) surveys completed in 1821, aerial photographs from the 1930’s to present, and LiDAR imagery from 2016/17 to evaluate changes in channel morphology in Big Barren Creek in Mark Twain National Forest in the Ozarks Highlands of southeast Missouri. The area was heavily …
Long-Term Hydrological Impacts Of Historical Logging On Recent Hydro-Geomorphic Conditions, Big Barren Creek Watershed, Mark Twain National Forest, Shoukat Ahmed
MSU Graduate Theses
Despite their important role of headwater watersheds as a buffer for upland soil and vegetation disturbances, there has been little research about the effects of historical logging practices on present-day watershed hydrology and channel form. Middle Big Barren Creek (MBBC) watershed (48 km2 ) drains Mark Twain National Forest in the Ozark Highlands and was heavily logged from 1880 to 1920, reducing native shortleaf pine forest by 90%. Additionally, the frequency of intense rainfall events has increased in the region over the past 30 years. In this study, field surveys and hydrologic/hydraulic modeling were used to evaluate the historical timber …
Ground Control Point Assessment For Suas-Based Sfm Photogrammetry, Bailey Dianne Wolf
Ground Control Point Assessment For Suas-Based Sfm Photogrammetry, Bailey Dianne Wolf
MSU Graduate Theses
The use of small Unmanned Aerial Systems (sUAS) in combination with Structure from Motion (SfM) photogrammetry is an evolving tool for geoscientists. SfM photogrammetry allows for rapid acquisition of the data that is required to create orthophotos and Digital Surface Models (DSMs) for a variety of field applications. Ground Control Points (GCPs) are used to reconstruct the DSM and evaluate the accuracy of aerial imagery collected from sUAS. When acquiring data for SfM photogrammetry, GCPs are required for spatial referencing. However, questions remain open regarding the effect of methodological techniques on the precision and accuracy of the resulting DSMs. This …
Geology Of The Clairmont Springs 7.5-Minute Quadrangle And Geochronology Of The Alabama Blue Ridge, Adelie Ionescu
Geology Of The Clairmont Springs 7.5-Minute Quadrangle And Geochronology Of The Alabama Blue Ridge, Adelie Ionescu
MSU Graduate Theses
The Alabama Blue Ridge (USA) of the southern Appalachians contains metamorphic rocks and structures associated with island arc accretion and continent-continent collision that record the Acadian and Alleghenian orogenies. The western Blue Ridge is underlain by Cambrian to Mississippian, clastic and carbonate, low-grade, greenschist facies metamorphic Talladega belt that formed outboard from the Alabama promontory or along the Laurentian margin. The eastern Blue Ridge contains the Neoproterozoic to Paleozoic, lithologically diverse, high grade, middle to upper amphibolite facies Ashland Supergroup. Geologic mapping of the Clairmont Springs 7.5- minute quadrangle unveils tectonic relationships between the eastern and western Blue Ridge and …
Assessing The Prevalance Of Joint-Controlled Mass Wasting In The Southern Appalachian Mountains, U.S.A., Madeline Konopinski
Assessing The Prevalance Of Joint-Controlled Mass Wasting In The Southern Appalachian Mountains, U.S.A., Madeline Konopinski
MSU Graduate Theses
Landslides are common hazards that produce devastating effects worldwide. Within the United States, the Appalachian Mountains are identified as an area of moderate to high susceptibility and incidence for landslides (Mirus et al., 2020; Wieczorek and Morgan, 2008). Given the presence of active seismic zones (eastern Tennessee and Giles County seismic zones) and variable rainfall due to seasonal storms (hurricanes) throughout the Appalachians, ancient earthquake activity or intense rainfall may trigger mass wasting events. Regional bedrock joints may further control the susceptibility of landslides to develop in specific locations during trigger events by providing a pre-existing weakness in the substrate. …
Analysis Of Gravity For The Crustal Structure Of Nepal Himalaya, Kapil Prasad Phuyal
Analysis Of Gravity For The Crustal Structure Of Nepal Himalaya, Kapil Prasad Phuyal
MSU Graduate Theses
Nepal Himalaya is situated in the central portion of the seismically active Himalayan Orogenic Belt, which is geologically segmented by four major mega fault structures: Main Frontal Thrust (MFT), Main Boundary Thrust (MBT), Main Central Thrust (MCT), and the South Tibetan Detachment System (STDS). The MFT, MBT, and MCT are part of the basal decollement Main Himalayan Thrust (MHT) which accommodates the convergence between the Indian and Eurasian Plate. The 2015 Gorkha Earthquake occurred within the MHT system, MHT system itself had been seismically locked since the 1934 Nepal-Bihar Earthquake, complicating the geometry depth of MHT. Available land and airborne …