A Step Toward Reconstructing Climate Variability Druing The Last Ice Age Cycle In The Northeast Pacific Region,
2022
University of Rhode Island
A Step Toward Reconstructing Climate Variability Druing The Last Ice Age Cycle In The Northeast Pacific Region, Blaine Lynch-Gadaleta
Senior Honors Projects
This study is designed as a step toward reconstructing the climate variability in the Northeast Pacific during the last ice age cycle, including the glacial and deglacial transitions. Reconstruction may also contribute to the regional picture of climate change and potentially provide new insights into the pattern of variability in the Northeast Pacific. Deep-sea sediment core AT26-19 09PC was collected west of the Juan de Fuca Ridge in the Northeast Pacific Ocean. Samples were analyzed in 1 cm intervals, representing approximately 300-year resolution. The abundance of mineral grains, planktonic foraminifera, and the polar foraminifera N.pachyderma was quantified using split aliquots …
Shallow Composition And Structure Of The San Gabriel Fault, California In Drill Core And Geophysical Logs: Implications For Fault Slip And Energetics,
2022
Utah State University
Shallow Composition And Structure Of The San Gabriel Fault, California In Drill Core And Geophysical Logs: Implications For Fault Slip And Energetics, Kaitlyn A. Crouch
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Earthquakes are the sudden and intensive release of energy due to slip along faults. This energy may be felt on the Earth’s surface and may cause displacement of the Earth’s crust (seismic slip). As an earthquake ruptures, rocks in and around the fault are damaged and altered. When a fault displaces without earthquakes, it is referred to as aseismic creep. Faults may experience both seismic slip and aseismic creep throughout their cycles. In order to better model earthquake hazards and understand the cause of seismic slip versus aseismic creep in the shallow crust, we need to characterize the properties of …
Core-Cm Williston Basin Carbon Ore, Rare Earth, And Critical Minerals,
2022
University of North Dakota
Core-Cm Williston Basin Carbon Ore, Rare Earth, And Critical Minerals, University Of North Dakota. Energy And Environmental Research Center
EERC Brochures and Fact Sheets
Fact sheet on the Carbon Ore, Rare Earth and Critical Minerals (CORE-CM) Initiative, an Energy & Environmental Research Center and U.S. Department of Energy project. Includes information on the importance of critical minerals and utilizing lignite from the Williston Basin. [This item is an outdated or superseded version and retained for historical purposes only. It may no longer reflect current information, policies, or practices.]
A Geochemical And Mineralogical Evaluation Of The Mona Lisa Turquoise Mine, Polk County, Arkansas,
2022
University of Arkansas, Fayetteville
A Geochemical And Mineralogical Evaluation Of The Mona Lisa Turquoise Mine, Polk County, Arkansas, Alexander Arai Goodsuhm
Graduate Theses and Dissertations
The presence of turquoise in Arkansas has long been disputed by geologists and gem collectors. Despite the prevalence of other phosphate minerals in Arkansas, such as planerite, wavellite, and variscite, the absence of an obvious copper (Cu) source required for turquoise formation was considered too great of an obstacle for turquoise mineralization. In this study, geologic, mineralogical, and geochemical techniques provide overwhelming evidence that the novaculite-hosted Mona Lisa Mine in Arkansas does produce turquoise. X-ray diffraction and Raman spectroscopy have confirmed the structural nature of the material and identified other phosphate minerals, such as crandallite, often found in assemblage with …
Characterization And Evolution Of The Professor Valley Pennsylvanian Salt Body (Paradox Basin, Ut) Using Gravity And Magnetotellurics,
2022
The University of Texas at El Paso
Characterization And Evolution Of The Professor Valley Pennsylvanian Salt Body (Paradox Basin, Ut) Using Gravity And Magnetotellurics, Derek Scott
Open Access Theses & Dissertations
Syndepositional halokinetic movement of the Pennsylvanian Paradox Formation in the Paradox Basin, UT & CO behaved as a control over the development of depositional systems during the Late Paleozoic and early Mesozoic periods (Trudgill, 2011). Understanding the controls on halokinetic evolution in the area serves as an invaluable outcrop analogue for similar subsurface salt bodies in petroleum-bearing basins and provides key insights for hydrocarbon exploration in salt basins world wide. Professor Valley, located 15 miles Northeast of Moab, UT is situated between the Fisher Valley (Onion Creek) and Cache/Salt Valley salt walls. It includes an anomalous, isolated 0.5 km² outcrop …
Computational Approaches To Understanding Subduction Zone Geodynamics, Surface Heat Flow, And The Metamorphic Rock Record,
2022
Boise State University
Computational Approaches To Understanding Subduction Zone Geodynamics, Surface Heat Flow, And The Metamorphic Rock Record, Buchanan C. Kerswell
Boise State University Theses and Dissertations
Pressure-temperature (PT) estimates from exhumed high-pressure (HP) metamorphic rocks and global surface heat flow observations evidently encode information about subduction zone thermal structure and the nature of mechanical and chemical processing of subducted materials along the interface between converging plates. Previous work demonstrates the possibility of decoding such geodynamic information by comparing numerical geodynamic models with empirical observations of surface heat flow and the metamorphic rock record. However, ambiguous interpretations can arise from this line of inquiry with respect to thermal gradients, plate coupling, and detachment and recovery of subducted materials. This dissertation applies a variety of computational techniques to …
Identifying The Isotopic Signature Of Lake-Effect Precipitation In Shallow Groundwater,
2022
Grand Valley State University
Identifying The Isotopic Signature Of Lake-Effect Precipitation In Shallow Groundwater, Andrew Brown
Honors Projects
Three different stable isotopes of water occur in nature, with the majority of water on Earth containing the oxygen isotope 16O. These isotopes have slightly differing physical and chemical properties. H2O with heavier oxygen isotopes should theoretically precipitate earlier than lighter isotope H2O, meaning this natural process should allow for the observation of the magnitude of effects of lake-effect precipitation on the basis of water isotope differences. Furthermore, it may allow for better understanding of the significance lake-effect precipitation plays in recharging shallow aquifers. In this study, patterns of lake-effect precipitation from Lake Michigan were observed in a collection of …
Air, Land, And Water Variables Associated With The First Appearance And
Current Spatial Distribution Of Toxic Prymnesium Parvum Blooms In Reservoirs
Of The Southern Great Plains, Usa,
2022
Texas Tech University
Air, Land, And Water Variables Associated With The First Appearance And Current Spatial Distribution Of Toxic Prymnesium Parvum Blooms In Reservoirs Of The Southern Great Plains, Usa, Shisbeth Tábora-Sarmiento, Reynaldo Patiño, Carlos Portillo-Quintero, Cade Coldren
United States Geological Survey: Staff Publications
This study examined the association of air, land, and water variables with the first historical occurrence and current distribution of toxic Prymnesium parvum blooms in reservoirs of the Brazos River and Colorado River, Texas (USA). One impacted and one reference reservoir were selected per basin. Land cover and use variables were estimated for the whole watershed (WW) and a 0.5-km zone on either side of streams (near field, NF). Variables were expressed in annual values. Principal component and trend analyses were used to determine (1) differences in environmental conditions before and after the 2001 onset of toxic blooms in impacted …
Quantitative Analysis Of The Maximum Rate And Minimum Duration For A 200 Km Stepwise Retreat Of The Bindschadler Ice Stream At ~11.5 Cal Kyr Bp,
2022
Louisiana State University
Quantitative Analysis Of The Maximum Rate And Minimum Duration For A 200 Km Stepwise Retreat Of The Bindschadler Ice Stream At ~11.5 Cal Kyr Bp, Matthew E Kratochvil
LSU Master's Theses
Small-scale morainal ridges on the middle continental shelf of the Whales Deep Basin partly record the rapid opening of a 200-km grounding line embayment slightly after ~11.5 cal kyr BP. The overlapping pattern of backstepped moraines indicates that the grounding line oscillated back and forth during the retreat. Published sediment fluxes were combined with new sediment volume mapping of the moraines to infer the rates at which the grounding line retreated. The analyses indicate that the rates of grounding line retreat on the eastern flank of the embayment ranged from ~490 m a-1 to 1,300 m a-1. …
Impact Of Traditional Versus Alternative Assessment On Student Achievement,
2022
Bowling Green State University
Impact Of Traditional Versus Alternative Assessment On Student Achievement, Beth Lustgarten
Honors Projects
The focus of this study looks at the effect of alternative assessment on student achievement in a high school science classroom. Within this action research, students have choices and are able to demonstrate creativity in their alternative assessments. By comparing student results from traditional and alternative assessments, the impact of assessment showed students had an overwhelming preference for completing alternative assessments, and a majority of students did better on the alternative assessment when compared to the traditional assessment.
The Geology Of The Mt. Simon Sandstone Storage Complex At The Wabash #1 Well, Vigo Co., Indiana (Subtask 7.2, Technical Report),
2022
Illinois State University
The Geology Of The Mt. Simon Sandstone Storage Complex At The Wabash #1 Well, Vigo Co., Indiana (Subtask 7.2, Technical Report), Jared T. Freiburg, Franck Delpomdor, John H. Mcbride, Hannes E. Leetaru, David H. Malone, Nate Grigsby, Mansour Khosravi, Scott Frailey, James R. Damico, Charles Monson, Zohreh Askari, Yaghoob Lasemi, Donna Willette, Oladipupo Babarinde, Chris Korose, Mingyue Yu, Lauren Gardiner
Faculty Publications - Geography, Geology, and the Environment
The Wabash CarbonSAFE project drilled the Wabash #1 stratigraphic test well (ID# 168045) at the Wabash Valley Resources (WVR) IGCC facility in Vigo County, Indiana, to characterize and evaluate the basal Cambrian Mt. Simon Sandstone for commercial-scale CO2 storage near the site. This report presents an extensive geologic characterization of the Mt. Simon storage complex and relevant data collected from the Wabash #1 well, such as lithologic data collected from cuttings and core, geophysical logging, geomechanical analysis of core samples, and well testing and fluid sampling within the Mt. Simon Sandstone. The Mt. Simon storage complex comprises two major sections: …
Spatial And Temporal Distribution And Habitat Selection Of Native
Yellowstone Cutthroat Trout And Nonnative Utah Chub,
2022
University of Idaho
Spatial And Temporal Distribution And Habitat Selection Of Native Yellowstone Cutthroat Trout And Nonnative Utah Chub, Darcy K. Mccarrick, Jeffrey C. Dillon, Brett High, Michael C. Quist
United States Geological Survey: Staff Publications
Henrys Lake, Idaho, is a renowned trophy trout fishery that faces an uncertain future following the establishment of Utah Chub (UTC) Gila atraria. Utah Chub were first documented in the lake in 1993 and have become abundant over the past two decades. Little is known about the ecology of UTC, but they typically have negative effects on salmonids in systems where they have been introduced. We sought to fill knowledge gaps in UTC ecology and provide insight on potential interactions with Yellowstone Cutthroat Trout (YCT) Oncorhynchus clarkii bouvieri. Ninety-four YCT and 95 UTC were radio-tagged in spring 2019 …
Connections Between Interglacial Variation And Lithological Variability Within Midland Basin Permian Shale Rocks In Martin County, Texas,
2022
Louisiana State University at Baton Rouge
Connections Between Interglacial Variation And Lithological Variability Within Midland Basin Permian Shale Rocks In Martin County, Texas, Helen Rice Hammon
LSU Master's Theses
The Upper Pennsylvanian (323.2–289.9 Ma) and Lower Permian (289.9-251 Ma), (Wolfcamp and Spraberry formations) interval of the Midland Basin, West Texas, contains a mixed succession of shale, carbonate, and siltstone/sandstone lithofacies that accumulated in a deep-water marine environment under variable hydrographic restrictions. The heterogenous stratigraphy found in the Wolfcamp and Spraberry formation was formed in response to variations in sea level and a transition from a glacial to an interglacial climate during the Early Permian. These fluctuations left behind alternating beds of mudstone and carbonate, interwoven with thin sandstone beds. Because the Wolfcamp and Spraberry formations are highly heterolithic, it …
Geo 100: Environmental Geology Oer Curation,
2022
Grand Valley State University
Geo 100: Environmental Geology Oer Curation, Chealsye Bowley
Curated OER Collections
This OER curation is an annotated bibliography of prospective OER for the GVSU course GEO 100: Environmental Geology.
Presence Or Absence Of Microcystins Within The Lake Macatawa Watershed,
2022
Hope College
Presence Or Absence Of Microcystins Within The Lake Macatawa Watershed, Keiley M. Hoving, Garrett E. Peck
21st Annual Celebration of Undergraduate Research and Creative Activity (2022)
Cyanobacteria, commonly known as blue-green algae, are freshwater aquatic microorganisms that are important indicators of climate change. They also release microcystins: toxins that can cause sickness, organ failure, or even death in plants, animals and humans. Studies have monitored microcystin presence and concentration in large-scale Cyanobacterial blooms, such as in Lake Erie, but often omit smaller scale instances. This project determines whether or not microcystins are present in the Lake Macatawa Watershed and identifies important conditional factors associated with microcystin presence to conclude if harmful algal blooms like those of Lake Erie are plausible locally. Six sample locations along the …
Connecting Chemical Composition And Methane Production In A West Michigan Peatland,
2022
Hope College
Connecting Chemical Composition And Methane Production In A West Michigan Peatland, Rachel Shaw, Grace Behrens, Lauren Bryan, Alexis Koehl, Christian Lundy
21st Annual Celebration of Undergraduate Research and Creative Activity (2022)
The future net radiative forcing of peatlands will depend in large part on changes in methane emissions. However, current climate models lack a mechanistic representation of methane production. We conducted an anaerobic incubation experiment using peat from various depths in five cores collected from a West Michigan peatland in order to connect methane production to observable differences in the chemical composition of peat and peat pore water. We hypothesized that less decomposed peat may have a larger supply of fermentable sugars that can thus produce more methane than more decomposed peat. C:N, hydrolyzable amino acids, and neutral sugars were analyzed …
Carbon Storage And Methane Production From Interdunal Wetlands In Saugatuck Harbor Natural Area,
2022
Hope College
Carbon Storage And Methane Production From Interdunal Wetlands In Saugatuck Harbor Natural Area, Grace Behrens
21st Annual Celebration of Undergraduate Research and Creative Activity (2022)
Wetlands have a dual impact on the climate: a cooling effect caused by organic matter accumulation in anoxic sediments (removing carbon dioxide from the atmosphere); and a warming effect caused by methane emissions from these sediments. In this study, we analyzed the relative importance of both processes in interdunal wetlands in the Saugatuck Harbor Natural Area (SHNA). The SHNA wetlands are a unique ecosystem, dependent on high water levels in Lake Michigan. Thus, carbon accumulation in the wetlands may be ephemeral as the lake level falls. Our goal in this study was to evaluate the extent of carbon accumulation in …
Terrestrial Trash Taphonomy: Characterizing Roadside Litter As Potential Sources Of Plastic In Waterways,
2022
Hope College
Terrestrial Trash Taphonomy: Characterizing Roadside Litter As Potential Sources Of Plastic In Waterways, Kailey M. Hoving, Kelly J. Gotham
21st Annual Celebration of Undergraduate Research and Creative Activity (2022)
We collected and characterized roadside litter from 300 m transects along 4 streets in Holland, Michigan that included stream crossings or storm drain inlets. Opposite sides of 3 roads were collected as separate sampling sites, and 4 of these were resampled after ~30 days, yielding 11 different collections. Litter was unevenly distributed within single transects, with some concentrations of litter (e.g., car parts, styrofoam) apparently resulting from single, localized releases of material. Despite such idiosyncratic occurrences, factor analysis of collected items placed associated sites (opposite sides of roads and resampled sites) in non-overlapping domains. Of 11,223 items analyzed, 83.2% were …
*Interactive Earthquake Visualization With Open Data,
2022
Southern Adventist University
*Interactive Earthquake Visualization With Open Data, Matous Hybl
Campus Research Month
Because earthquakes claim thousands of lives and billions of dollars yearly, there is a great need to recognize patterns in seismic data. While some tools for analysis exist, most geological software is expensive and open earthquake visualizations are limited. In this project, we provide accessible earthquake visualizations aimed to encourage geologists, and science enthusiasts in general, to explore open data using accessible, yet powerful, tools.
Connections Between Interglacial Variation And Lithological Variability Within Midland Basin Permian Shale Rocks In Martin County, Texas,
2022
Louisiana State University at Baton Rouge
Connections Between Interglacial Variation And Lithological Variability Within Midland Basin Permian Shale Rocks In Martin County, Texas, Helen Rice Hammon
LSU Master's Theses
The Upper Pennsylvanian (323.2–289.9 Ma) and Lower Permian (289.9-251 Ma), (Wolfcamp and Spraberry formations) interval of the Midland Basin, West Texas, contains a mixed succession of shale, carbonate, and siltstone/sandstone lithofacies that accumulated in a deep-water marine environment under variable hydrographic restrictions. The heterogenous stratigraphy found in the Wolfcamp and Spraberry formation was formed in response to variations in sea level and a transition from a glacial to an interglacial climate during the Early Permian. These fluctuations left behind alternating beds of mudstone and carbonate, interwoven with thin sandstone beds. Because the Wolfcamp and Spraberry formations are highly heterolithic, it …
