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Articles 6541 - 6570 of 29999
Full-Text Articles in Geology
Mgrre_Lithstriplog_Fenstermacher, M Dale & Eleanor I 1_21107222950000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Fenstermacher, M Dale & Eleanor I 1_21107222950000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Hughes, Lola 1_21111012690000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Hughes, Lola 1_21111012690000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Waters D 1_21107034280000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Waters D 1_21107034280000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Hurst, W. G. 1_21107161200000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Hurst, W. G. 1_21107161200000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Steed, Adrian 3_21111015940000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Steed, Adrian 3_21111015940000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Charlotte 1_21045003509000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Charlotte 1_21045003509000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Kalamazoo 1_21077003729000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Kalamazoo 1_21077003729000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Village Of Kaleva 1-20_21101294170000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Village Of Kaleva 1-20_21101294170000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Harris, William 1_21111053980000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Harris, William 1_21111053980000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_R. 1 & R. 24_21101000140000, Mgrre Western Michigan University
Mgrre_Lithstriplog_R. 1 & R. 24_21101000140000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Schoonmaker, Lillian M 1_21107206400000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Schoonmaker, Lillian M 1_21107206400000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Jacobs, Mary 1_21111023820000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Jacobs, Mary 1_21111023820000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_H.E. Tope Inc. A-1_21073277750000, Mgrre Western Michigan University
Mgrre_Lithstriplog_H.E. Tope Inc. A-1_21073277750000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Emery Brothers 1_21069004579000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Emery Brothers 1_21069004579000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Emery, Sadie 1_21057166640000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Emery, Sadie 1_21057166640000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Bridgman Oil And Gas 1_21021003689000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Bridgman Oil And Gas 1_21021003689000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_State Grant 1_21107103240000, Mgrre Western Michigan University
Mgrre_Lithstriplog_State Grant 1_21107103240000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Fike, Vernell 2_21073272510000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Fike, Vernell 2_21073272510000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Mgrre_Lithstriplog_Packaging Corp Of America Unit "C" 1-26_21101304270000, Mgrre Western Michigan University
Mgrre_Lithstriplog_Packaging Corp Of America Unit "C" 1-26_21101304270000, Mgrre Western Michigan University
Legacy Color Lithology Strip Logs
No abstract provided.
Subsurface Geophysical Investigations Of Oneida Lake Ny: Insights Into Ice Sheet Processes And Deglaciation At Termination I, Nicholas John Zaremba
Subsurface Geophysical Investigations Of Oneida Lake Ny: Insights Into Ice Sheet Processes And Deglaciation At Termination I, Nicholas John Zaremba
Dissertations - ALL
Reconstructing the retreat of the Laurentide Ice Sheet (LIS) provides insight into understanding end-Pleistocene climate, a critical set of boundary conditions prior to the onset of Holocene climates that were optimal for human dispersal and societal growth. Constraining ice sheet dynamics, glacier retreat rates, and the timing of still-stands and readvances requires identifying glacial landforms such as moraines, drumlins, and mega-scale glacial lineations (MSGLs). Drumlins and MSGLs indicate ice sheet flow directions and provide the location of paleo-ice streams, which were accelerated and localized pathways for ice discharge. Ice streams control ice sheet mass balance; therefore, identifying the location of …
Nutrient Restoration Of A Large, Impounded, Ultra-Oligotrophic Western River To Recover Declining Native Fishes, Ryan S. Hardy, Tyler J. Ross, Kevin N. Mcdonnell, Michael C. Quist, Charlie Holderman, Bryan S. Stevens
Nutrient Restoration Of A Large, Impounded, Ultra-Oligotrophic Western River To Recover Declining Native Fishes, Ryan S. Hardy, Tyler J. Ross, Kevin N. Mcdonnell, Michael C. Quist, Charlie Holderman, Bryan S. Stevens
United States Geological Survey: Staff Publications
Declines in many fish populations in large, western rivers have been primarily attributed to the anthropogenic reduction of nutrient inputs and subsequent impacts to the food web. The largest known river fertilization program was implemented starting in 2005 on the Kootenai River in northern Idaho to restore resident fisheries. Annual electrofishing surveys were conducted at multiple sites in Idaho and Montana before and during nutrient addition to evaluate assemblage and population-level responses. Although few responses in fish assemblage structure were observed, the addition of liquid ammonium polyphosphate fertilizer (3 μg/L) to the Kootenai River increased fish abundance and biomass over …
Structural And Biological Analysis Of Faults In Basalts In Sheepshead Mountains, Oregon As An Earth Analogue To Mars, Allison Bohanon
Structural And Biological Analysis Of Faults In Basalts In Sheepshead Mountains, Oregon As An Earth Analogue To Mars, Allison Bohanon
Theses and Dissertations
Microbial life on Mars is not visible from orbit or by rover cameras, but the fracture networks and scarp morphologies associated with fractures they could live in are measurable. We conducted a field analogue study of 92 normal fault scarps in the Sheepshead Mountains, Oregon to examine the correlation between scarp morphology and vegetation growth in the Steens Basalt. While vegetation is not expected on Mars, the fracture networks that sustain vegetation offer the same micro-environment that would support and protect endoliths. Structural variables were measured in the field and infrared spectra of fault scarps were measured using a handheld …
Characterization Of Quaternary Stratigraphy In The Mississippi Sound To Evaluate The Influence Of Geologic Heterogeneity On Submarine Groundwater Transport And Discharge, Zachary Peoples
Theses and Dissertations
Submarine Groundwater Discharge (SGD) through seafloor sediments is gaining recognition as an important component of coastal water quality. Stratigraphic features creating geologic heterogeneity, such as incised paleochannels, may influence preferential pathways for SGD. The central Mississippi Sound is underlain by paleochannels that were incised into Pleistocene sediments while the area was subaerially exposed during the last glacial maximum and are now buried by transgressive Holocene deposits. In this thesis, newly collected chirp, previously published seismic reflection, and sediment core data are used to characterize the three-dimensional structure of the Holocene-Pleistocene contact. Results indicate that Pleistocene paleochannels cross-cut the study area, …
Using Geologic Principles And Data To Create A Symphony For Wind Ensemble, Thomas J. Davis
Using Geologic Principles And Data To Create A Symphony For Wind Ensemble, Thomas J. Davis
2022 Symposium
Geology and geologic processes have featured in many pieces of classical music such as Alan Hovhaness’ symphonic works after Mt. St. Helens and Glacier Peak but these pieces are impressionistic and only take general inspiration from the geology of their subjects. This paper describes the creation of Tectonics (2021) a piece which incorporates and describes many geologic principles and processes, such as mantle convection, through the musical form of cannon, the formation of fold and thrust belts whose cross sections are directly visually recreated in the score, and the physical dynamics of earthquake waves demonstrated through variations of pitch and …
Pre-Eruptive Magma Configurations And Petrogenetic Relationships Of The Rattlesnake Tuff, Oregon–Insights From Spectacularly Banded High-Silica Rhyolite Pumices, Vanessa M. Swenton, Martin J. Streck
Pre-Eruptive Magma Configurations And Petrogenetic Relationships Of The Rattlesnake Tuff, Oregon–Insights From Spectacularly Banded High-Silica Rhyolite Pumices, Vanessa M. Swenton, Martin J. Streck
Geology Faculty Publications and Presentations
The 7.1Ma Rattlesnake Tuff (RST) of eastern Oregon is a widespread and voluminous (>300 km3) ignimbrite composed of 99% crystal poor (≤1%) high-silica rhyolite (HSR) and
Analysis Of Aftershock Parameters For The Alaskan Subduction Zone Tectonic Region, Gabrielle M. Paris (They/Them), Richard C. Hugo, Andrew J. Michael
Analysis Of Aftershock Parameters For The Alaskan Subduction Zone Tectonic Region, Gabrielle M. Paris (They/Them), Richard C. Hugo, Andrew J. Michael
Student Research Symposium
On 29 July 2021, a magnitude 8.2 earthquake was felt by over 200 people near Perryville, Alaska. The early aftershock forecasts issued by the USGS use default parameters based on expected productivity within a given tectonic region. These forecasts predicted a slower decrease in aftershock activity than what was observed. Even after the USGS adjusted the aftershock forecast parameters, the forecasts did not improve in the long term. Accurate aftershock predictions are important for maintaining public confidence in disaster alert systems. The question I want to explore is: are the generic parameters used in aftershock forecasting accurately describing the observed …
Factors Influencing Tree Growth In A Bottomland Hardwood Along The Green River In Kentucky, Caleb Miller
Factors Influencing Tree Growth In A Bottomland Hardwood Along The Green River In Kentucky, Caleb Miller
Masters Theses & Specialist Projects
In bottomland hardwood forests, large fluctuations in moisture availability can lead to stress from both flooded and drought conditions. These forests can have a complex species composition with different water use and drought strategies. The bottomlands in which these species co-occur can have a complex spatial distribution of alluvial sediments due to the meandering and migration of river or stream channels, which may impact the hydrology, nutrient dynamics, and productivity. At Western Kentucky University's Green River Preserve, approximately 9 ha of bottomland hardwood forest were planted in 2006. Although these hardwoods have received equal amounts of sunlight, rainfall, and wind, …
Identifying The Isotopic Signature Of Lake-Effect Precipitation In Shallow Groundwater, Andrew Brown
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 …
Computational Approaches To Understanding Subduction Zone Geodynamics, Surface Heat Flow, And The Metamorphic Rock Record, Buchanan C. Kerswell
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 …
A Step Toward Reconstructing Climate Variability Druing The Last Ice Age Cycle In The Northeast Pacific Region, Blaine Lynch-Gadaleta
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 …