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Studies Of The Mechanics And Structure Of Shallow Magmatic Plumbing Systems, Mikel Díez

USF Tampa Graduate Theses and Dissertations

Volcanic activity, and the resultant deposits and structures at the Earth's surface, are the outcome of the inner workings of underground magmatic plumbing systems. These systems, essentially, consist of magma reservoirs which supply magma to the surface through volcanic conduits feeding volcanic eruptions. The mechanics and structure of plumbing systems remain largely unknown due to the obvious challenges involved in inferring volcanic processes occurring underground from observations at the surface. Nevertheless, volcanologists are beginning to gain a deeper understanding of the workings and architecture of magmatic plumbing systems from geophysical observations on active volcanoes, as well as from geological studies …

An Ordovician Global Reference Section Recently Selected In Oklahoma, Daniel Goldman, Stephen A. Leslie, Stig M. Bergström, Jaak Nõlvak, Seth A. Young, Stanley C. Finney

Department of Earth, Environment and Sustainability Faculty Publications

Ordovician fossil faunas are characterized by a marked biogeographic differentiation that results in a minimal similarity between most North American faunas and those of major Ordovician areas elsewhere in the world. This provincial distribution of most fossils has led to establishment of different schemes of fossil-based regional stages in, for instance, North America, Baltoscandia, China, and the British Isles.

Because these chrono-stratigraphic units have been largely based on shelly fossils with distributions restricted to a particular region, it has been impossible in most cases to establish a precise international correlation of these regional stages. Furthermore, some general terms, such as …

Backstripping The Chesapeake Bay Impact Structure: Differentiating Regional Tectonics From Impact Effects, Travis Gary Hayden

Masters Theses

The Chesapeake Bay impact structure is a ca. 35.4 Ma old crater located on the coastal plain of Virginia along the eastern seaboard of North America. The impact generated a crater between 85 and 90 km in diameter, and over 2000 meters deep. Deposition returned to normal shortly after impact, resulting in a unique record of both the impact related and subsequent passive margin sedimentation. We use backstripping to show that the impact strongly affected sedimentation for 7 m.y. through a combination of impact derived crustal scale tectonics, dominated by the introduction and subsequent removal of a negative thermal anomaly, …

The Case For Humboldtensis: A Subspecies Name For The Indigenous Cutthroat Trout (Oncorhynchus Clarkii) Of The Humboldt River, Upper Quinn River, And Coyote Basin Drainages, Nevada And Oregon, Patrick C. Trotter, Robert J. Behnke

Western North American Naturalist

In the early years of his research on the native trouts of western North America, Behnke (1960, 1966, 1979) observed consistent differences in certain meristic characters between the cutthroat trout of the Humboldt River drainage and those from the Truckee, Carson, and Walker river drainages of the Lahontan Basin, and proposed that the Humboldt trout be recognized as a distinct subspecies. He coined the subspecies name humboldtensis, but a formal description was never published. Here we again present the early evidence for subspecific distinction of the Humboldt drainage cutthroat trout, and add more recent findings from the fields of …

The Pacifican March 20, 2008, University Of The Pacific

All Issues - Student Newspaper, The Pacifican, Pacific Weekly

No abstract provided.

Winning The Invisible War: An Agricultural Pilot Plan For Afghanistan, Edward Borcherdt, Austin Carson, Frank Kennefick, James Moseley, William Taylor, Harlan Ullman, Larry Wentz

Defense and Technology Papers

The purpose of this paper is to propose efforts to integrate a comprehensive campaign plan that brings together security and reconstruction efforts and the plethora of governmental and nongovernmental organizations working in Afghanistan.

Turning Water Into Power: Debates Over The Development Of Tanzania’S Rufiji River Basin, 1945–1985, Heather J. Hoag, May-Britt Öhman

History

This historical analysis examines the forces that shaped the collection and use of geographical data in Tanzania’s Rufiji Basin. Hoping to develop irrigated agriculture, colonial engineers surveyed the basin’s social and environmental landscapes and weighed the costs of damming. Following World War II, international experts interested in hydropower development conducted more geographical studies. While their studies offered limited information on stream flow, political and economic pressures led to their acceptance over those of colonial engineers. By illustrating how international institutions select what is accepted as knowledge and how such knowledge is used, the case highlights the politics of hydropower development …

Pamphlet To Accompany Geologic Map Gmc-34: Geologic Map Of The O’Neill 1º X 2º Quadrangle, Nebraska, With Configuration Maps Of Surfaces Of Formations, Robert F. Diffendal Jr., Michael R. Voorhies, E. Jane Voorhies, H. E. Lagarry, C. L. Timperley, M. E. Perkins

Robert F. Diffendal, Jr., Publications

This map is necessarily generalized. It is based primarily on data from 7.5’ surficial geologic quadrangle maps of the map area prepared by the authors principally from 1991 to 2000, from Voorhies (unpublished data, 1974), as well as data from test-hole drilling done across the quadrangle by the Conservation and Survey Division, University of Nebraska, and its cooperators over many years since the 1930s. For more detailed information, consult the geologic data files of the Conservation and Survey Division, School of Natural Resources, University of Nebraska-Lincoln. The quadrangle is mostly covered by vegetation and Holocene sediments. Limited good exposures of …

Metcrax 2006 - Meteorological Experiments In Arizona's Meteor Crater, C. David Whiteman, Sebastian Hoch, Maura Hahnenberger, Andreas Muschinski, Vincent Hohreiter, Mario Behn, Yonghum Cheon, Sharon Zhong, Wenqing Yao, David Fritts, Craig Clements, Thomas Horst, William Brown, Steven Oncley

Faculty Publications, Meteorology and Climate Science

The Meteor Crater Experiment (METCRAX 2006) was conducted in October 2006 at Arizona's Meteor Crater to investigate stable boundary layer evolution in a topographically uncomplicated basin surrounded by the nearly homogeneous plain of the Colorado Plateau. The two goals of the experiment were 1) to investigate the microscale and mesoscale structure and evolution of the stable boundary layer in the crater and its surroundings and 2) to determine whether atmospheric seiches or standing waves are produced inside the crater. This article provides an overview of the scientific goals of the experiment; summarizes the research measurements, the crater topography, and the …

Geological Mapping Of Orhon, Tariat, And Egiin Dawaa, Central Mongolia, Through The Interpretation Of Remote Sensing Data, Tara Alexandra Stolz

Browse all Theses and Dissertations

Multi-spectral satellite data from the Advanced Spaceborn Thermal Emission and Reflection Radiometer (ASTER) and Landsat Thematic Mapper (TM) were used to make interpretations regarding the surface lithology and structure of the Tariat, Egiin Dawaa, and Orhon regions in Central Mongolia. These areas experienced widespread Cenozoic volcanism. This study mapped the locations and extents of the volcanic flows, located cinder cones and faults evident in the areas, and identified a possible exposure of the Mongolian granitic batholith in the Orhon area. ER Mapper, a geospatial imaging software, was used to generate and run algorithms. Image transforms and supervised classifications were used …

Summary Of The Investigation Of The May 10, 2008, Belden, Mississippi Earthquake Pontotoc, Lee And Union Counties Mississippi, Charles Swann

Open-File Reports

No abstract provided.

In Memoriam Jean Philippe Marcoux, A.M. Celal Şengör

Turkish Journal of Earth Sciences

No abstract provided.

Composition, Microstructures, And Petrophysics Of The Mozumi Fault, Japan: In Situ Analyses Of Fault Zone Properties And Structure In Sedimentary Rocks From Shallow Crustal Levels, Angela J. Isaacs, James P. Evans, Peter T. Kolesar, Tsuyoshi Nohara

Geosciences Faculty Publications

[1] We characterize the chemical, microstructural, and geophysical properties of fault-related rock samples from the 80–100 m wide Mozumi fault zone, north central Honshu, Japan. The fault is exposed in a research tunnel 300–400 m below the ground, and we combine geological data with borehole geophysical logs to determine the elastic and seismic properties of the fault zone. Detailed mapping within the tunnel reveals that the fault zone consists of two zones of breccia to foliated cataclasites 20 and 50 m thick. Two narrow (tens of centimeters wide) principal slip zones on which most of the slip occurred bound the …

Sex And The Agricultural Transition: Dental Health Among Early Agricultural Females, Misty Fields

UNLV Retrospective Theses & Dissertations

This project analyzed dentition from a sample (n =142) of Early Agricultural period skeletons (B.C. 1600-200 A.D.) from the site of La Playa (SON F:10:3), Sonora, Mexico. Data was collected on pathology rates for dental caries and antemortem tooth loss (AMTL) to test the hypothesis that hormone-fluctuations associated with pregnancy increase dental pathology in females. Males and females were not found to have significant differences in caries rates. However, statistically significant differences in AMTL were found with females exhibiting more tooth loss than males ( p=.022). When compared across age categories, reproductive-age females had substantial increases in AMTL compared to …

Content Is Not Enough: A History Of Secondary Earth Science Teacher Preparation With Recommendations For Today, Elizabeth B. Lewis

Department of Teaching, Learning, and Teacher Education: Faculty Publications

Secondary geoscience education has its roots in geography and physiographic education from the turn of the 20th century. High school Earth science reached a peak during the late 1960s and 1970s, after plate tectonic theory revolutionized geology. The production of Earth science teachers, unlike biology teachers, has never reached full capacity, which has likely contributed to the lesser presence and status of Earth and space science in U.S. high schools today. Historically, the geoscience community has focused on enriching teachers' geoscience content knowledge, but modern Earth and space science teachers need more than just content knowledge.

Based on current science …

Sunridge Development Corporation And Sunridge Enterprises, Llc V. Rb&G Engineering, Inc. : Brief Of Petitioner, Utah Supreme Court

Utah Supreme Court Briefs (2000–2020)

Appeal from the Fourth Judicial District Court, Utah County, State of Utah The Honorable Fred. D. Howard

Modern Strain Localization In The Central Walker Lane, Western United States: Implications For The Evolution Of Intraplate Deformation In Transtensional Settings, Benjamin E. Surpless

Earth and Environmental Geosciences Faculty Research

Approximately 25% of the differential motion between the Pacific and North American plates occurs in the Walker Lane, a zone of dextral motion within the western margin of the Basin and Range province. At the latitude of Lake Tahoe, the central Walker Lane has been considered a zone of transtension, with strain accommodated by dip-slip, strike-slip, and oblique-slip faults. Geologic data indicate that extension and strike-slip motion are partitioned across the central Walker Lane, with dip-slip motion resulting in E–W to ESE–WNW extension along the present-day western margin of the central Walker Lane since approximately 15 Ma, and dextral strike-slip …

Heavy Metal Content In Soils Under Different Wastewater Irrigation Patterns In Chihuahua, Mexico, V. M. Maldonado, H. Q. Rubio-Arias, R. Quintana, R. A. Saucedo, Melida Gutierrez, J. A. Ortega, G. V. Nevarez

College of Natural and Applied Sciences

An area near the city of Chihuahua has been traditionally irrigated with wastewater to grow forage crops. It has been hypothesized that metal levels could be found in these soils high enough to cause potential health problems to the population. The objective of this study was to determine heavy metal concentrations in different soils due to irrigation practices. Four soil types were evaluated; a soil with a past and present history of wastewater irrigation (S1), a soil with a history of wastewater irrigation until 2003 (S2), a soil with no irrigation history (S3), and a soil similar to S1 and …

Middle Crustal Ductile Deformation Patterns In Southern Tibet: Insights From Vorticity Studies In Mabja Dome, Jackie Langille

All Master's Theses

Mabja Dome, southern Tibet, exposes mid-crustal rocks proposed to have originated from a southward flowing mid-crustal channel. Kinematic, mean kinematic vorticity (Wm), and metamorphic petrography analyses on these mid-crustal rocks were performed to test this hypothesis. Kinematic indicators show a transition with structural depth from top-north and top-south shear to solely top-south shear. Along the northernmost transects, Wm in schists and orthogneisses range from 0.52–0.84 (63–36% pure shear). Wm for quartzites ranges from 0.9–0.99 (27–1% pure shear). Deformation temperatures increase from ~450 °C in the chloritoid-zone to ~700 °C in the sillimanite-zone and were recorded between ~35–16 Ma. These patterns …

History Of Humanities And Integrated Studies Program: 1983-2008, Tami S. Carmichael

UND Departmental Histories

This departmental history was written on the occasion of the UND Quasquicentennial in 2008.

Saint Maló Remembered, Erin Elizabeth Voisin

LSU Master's Theses

This research explores the unique process of creolization that occurred in Southern Louisiana through the development of the figure of San Maló over time. His transformation from historic rebel to religious icon takes place through the devices of folklore, poetry, and song. This developmental process of a culture redefining its heroes through oral tradition represents the dynamism of creolization. The transformative process of San Maló serves as an exemplary representation of how a culture negotiates its own history with what is deemed necessary and beneficial to the culture’s survival. All information on this transformation was gathered through historic research and …

Turbulent Lifestyle: Microbial Mats On Earth’S Sandy Beaches—Today And 3 Billion Years Ago, Nora Noffke

OES Faculty Publications

Archean Earth history is very difficult to reconstruct. Until recently, only bacterial cells preserved in chert, microborings, and stromatolites provided the few clues to ancient life. Now, siliciclastic “microbially induced sedimentary structures” (MISS) are adding to our knowledge of both past life and paleoenvironments. MISS rise from the interaction of photoautotrophic microbial mats with physical sediment dynamics in siliciclastic, shallow-marine settings. Archean MISS can be understood through observations of living microbial mats and modern biotic-physical sedimentary processes. Such geobiological studies are key to the interpretation of the early evolution of prokaryotes. For example, the 2.9 Ga Pongola Supergroup, South Africa, …

Reading Scripture In Crisis: The Victorian Crisis Of Faith And Macdonald’S Response To Coleridge, Gisela Kreglinger

North Wind: A Journal of George MacDonald Studies

No abstract provided.

Effect Of Oilfield Brine On Groundwater Quality In Marmul Area, Sultanate Of Oman, Salim Ahmed Sakroon

Theses

During a period of 28 years, more than 96 million m³ of oilfield produced water was re-injected in the shallow aquifer at Marmul oilfield area, and changed groundwater characteristics. The 10 wells of Shallow Water Disposal (SWD) have been used to inject water in shallow groundwater aquifers of Dammam and Rus formations. The disposal of oilfield produced water to shallow aquifer has been continuing since 1980, with approximately 96 Mm³ of produced water having been disposed and an estimation of approximately 9600 m³ oil has been disposed of in this case until the beginning of 2008.

The …

Archaeological Investigations On Little Folly Island, Steven D. Smith

Faculty Publications

No abstract provided.

Paleoclimate Of The Late Oligocene Arctic Ocean: Molluscan Isotopic And Biotic Evidence, Rebecca B. Port

Electronic Theses and Dissertations 2000 - 2009

Molluscan isotopic and biotic evidence was used to determine the paleotemperature of the Late Oligocene Arctic Ocean during an important period of climate change. Mollusks were collected from the Nuwok Member type section on the Arctic coast of Alaska. A systematic analysis was conducted to determine the position of Late Oligocene Arctic mollusks within a context of marine Cenozoic evolution and diversification. Oxygen stable isotope ratios of five fossil genera were used to calculate paleotemperatures and analyze growth histories. Taxa were selected to check for compatibility of results between fossil genera from the same environment. Oxygen stable isotope ratios of …