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2022

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Articles 6271 - 6300 of 6506

Full-Text Articles in Earth Sciences

Unearthing The Effects Of European-American Settlement On A Northeast Ohio Kettle Lake Through Diatom Stratigraphy, Justine Paul A. Berina Jan 2022

Unearthing The Effects Of European-American Settlement On A Northeast Ohio Kettle Lake Through Diatom Stratigraphy, Justine Paul A. Berina

Senior Independent Study Theses

Recently, wetland conservation has highlighted the necessity for assessing limnological changes following European-American settlement. A prior study at Brown's Lake (northeast Ohio) identified a stratigraphic sequence that shows an abrupt transition from organic-rich muds to several centimeters of a bright loess layer, then a recovery to organic-rich sediments near the top. Based on 210Pb dates, the loess deposition occurred before 1846 CE, when a growing population cleared trees and farmed intensively. Likewise, organics had recovered after 1950 CE, when people abandoned farmland and practiced conservation tillage. However, the effects of settlement on limnology are poorly known. Diatoms (microscopic algae; …

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Wide-Area Ground Deformation Monitoring In Geothermal Fields In Western Turkey, Gökhan Aslan, Hakki Aydin, Zi̇yadi̇n Çakir Jan 2022

Wide-Area Ground Deformation Monitoring In Geothermal Fields In Western Turkey, Gökhan Aslan, Hakki Aydin, Zi̇yadi̇n Çakir

Turkish Journal of Earth Sciences

The large-scale production and injection of geothermal fluids induce pressure, volume, and temperature gradient changes in the subsurface, which may result in surface deformation as well. Interferometric synthetic aperture radar (InSAR) is a promising utility for monitoring ground surface deformation and inferring subsurface reservoir operations that are difficult to observe directly. This study provides the first wide-area InSAR-derived long-term ground deformation across major geothermal fields in western Turkey. It aims to identify ground deformation hotspots within the geothermal exploitation sites and analyze their relationship with energy production and pumping. In the present study, the whole 2014?2020 Sentinel 1-A and 1-B …

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Reducing Uncertainty With Fault Seal Analysis: A Case Study Of Jherruck Block, Lowerindus Basin, Pakistan, Mudassar Nawaz, Muhammad Rustam Khan, Umair Bin Nisar, Muhammad Rizwan Mughal Jan 2022

Reducing Uncertainty With Fault Seal Analysis: A Case Study Of Jherruck Block, Lowerindus Basin, Pakistan, Mudassar Nawaz, Muhammad Rustam Khan, Umair Bin Nisar, Muhammad Rizwan Mughal

Turkish Journal of Earth Sciences

Faults can be either conduits or baffles for hydrocarbon flow. Assessing the sealing potential of faults plays a vital role in reducing the risks associated with hydrocarbon exploration. The study area is located in Jherruck Block, Lower Indus Basin, Pakistan. Several intervals within the Lower Goru Formation in Lower Indus Basin are proven hydrocarbon reservoirs. The main aim of the study is to predict the cause of failure of 3 wells (Jherruck B-1, Jamali-1, and Jamali Deep-1), and to propose a new well location based on juxtaposition analysis and shale gouge ratio (SGR). The Upper Sands (sandstone) of the Lower …

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Petrology, Geochemistry, And Geodynamic Implications Of The Ediacaran Volcanism Of The Southwestern Edge Of The Saghro Massif (Eastern Anti-Atlas, Morocco), Rachid Zahour, Ghalem Zahour, Hassan El Hadi, Youssef Zerhouni, Zouhair Baroudi, Mounia Khoukhouchi Jan 2022

Petrology, Geochemistry, And Geodynamic Implications Of The Ediacaran Volcanism Of The Southwestern Edge Of The Saghro Massif (Eastern Anti-Atlas, Morocco), Rachid Zahour, Ghalem Zahour, Hassan El Hadi, Youssef Zerhouni, Zouhair Baroudi, Mounia Khoukhouchi

Turkish Journal of Earth Sciences

The southwestern edge of the Saghro Massif experienced during the Ediacaran period an intense volcanic activity represented by basaltic andesites and acid rocks with ignimbritic dominance. The chemical characteristics of these rocks correspond to those of calc-alkaline orogenic magmatism related to a subduction zone. The genesis of these two rock groups does not seem to be controlled by the fractional crystallization process as a factor controlling their evolution. Partial melting of a lithospheric mantle still influenced by the Pan-African orogeny and a contaminated constituent of the lower continental crust is a likely source of the basaltic andesites. Ignimbrites represent the …

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Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo Jan 2022

Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo

Turkish Journal of Earth Sciences

The Nakamura method, known as horizontal to vertical spectral ratio (HVSR), has been used to analyze site effect assessment. Over the past decade, various HVSR curve inversion methods for near-surface geophysical surveys have been developed. Particle swarm optimization (PSO) inversion method has been applied to solve the HVSR inversion curve to estimate the shear wave velocity (Vs) value towards the depth. In this study, the HVSR curve inversion experiment has been applied with two synthetic data: noise-free data and the other is contaminated by 10% random noise. This research aims to find out how the PSO algorithm performs to find …

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Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan Jan 2022

Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan

Turkish Journal of Earth Sciences

Red soils as the weathering products in Muğla Polje (SW Turkey) show different occurrences either on hard and permeable limestone (terra rossa (TRs)) or within the matrix of transported sediments (alluvium-derived soils (ALs), alluvium-derived soils specifically from clastics (ALsc), paleosol (Pls), and colluvium-derived soils (CLs)). The purpose of this study is to unlock the effect of weathering on hard carbonate rocks and dynamic young land surfaces (alluvium and colluvium) in Muğla Polje for the first time in terms of mineralogical and geochemical compositions. TRs, the soils of more stable environments are clayey while ALs and CLs as being the soils …

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A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva Jan 2022

A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva

Turkish Journal of Earth Sciences

Lake Kaindy, which is located in the Kazakhstan side of the Tien Shan Mountains is one of the most famous places in the World due to having sunken Picea schrenkiana Fisch. & C.A.Mey. trees within the Lake. The purpose of the study is to find the dead years of the sunken trees in the lake and therefore to confirm the formation time of Kaindy Lake, and if there is an effect of the 1911 Kemin earthquake on the tree-ring width of Picea schrenkiana around the lake. Eight wood pieces and two increment cores from the sunken trees were taken to …

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Developing And Validating A Standard Operating Procedure For Quantitative Analysis Using Central Washington University's X-Ray Diffractometer, Katherine Lucas Jan 2022

Developing And Validating A Standard Operating Procedure For Quantitative Analysis Using Central Washington University's X-Ray Diffractometer, Katherine Lucas

Undergraduate Honors Theses

X-ray diffraction (XRD) is widely applied in a variety of disciplines to identify crystalline solids in a powdered sample. Recent software advances have made quantitative analysis of samples easier and more accessible, but the quality of the result depends on the sample preparation and data collection procedure. This project focuses on testing methods of sample preparation and XRD data collection and analysis to lay the groundwork for refinement of the existing standard operating procedures at CWU. First, I determined the ball mill grinding time necessary to powder different mineral samples. The addition of hand grinding to ball mill-ground samples produced …

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Surficial Geologic Map Of The Flaherty 7.5-Minute Quadrangle, Kentucky, Ann Hislop, Matthew Massey, Maxwell L. Hammond Iii, Antonia E. Bottoms, Michele Mchugh, Emily Morris Jan 2022

Surficial Geologic Map Of The Flaherty 7.5-Minute Quadrangle, Kentucky, Ann Hislop, Matthew Massey, Maxwell L. Hammond Iii, Antonia E. Bottoms, Michele Mchugh, Emily Morris

Contract Reports--KGS

The Flaherty 7.5-minute quadrangle is located southwest of Louisville and northwest of Elizabethtown along the boundary between Hardin and Meade Counties. The quadrangle includes mostly the Pennyroyal region of the Mississippian Plateau and also smaller areas of the Mammoth Cave plateau and the highly dissected Dripping Springs escarpment in the western half of the map area (McDowell, 1986). Topography is mostly characterized by pervasive sinkhole development in a lower elevation and low-relief plain, and high-relief plateaus, ridges, and knobs of the Dripping Springs escarpment scattered along the west side of the quadrangle. Swadley (1963) mapped the bedrock geology of the …

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Surficial Geologic Map Of The Millerstown 7.5-Minute Quadrangle, Kentucky, Matthew Massey, Maxwell L. Hammond Iii, Antonia Bottoms, Ann Hislop, Michele Mchugh, Emily Morris Jan 2022

Surficial Geologic Map Of The Millerstown 7.5-Minute Quadrangle, Kentucky, Matthew Massey, Maxwell L. Hammond Iii, Antonia Bottoms, Ann Hislop, Michele Mchugh, Emily Morris

Contract Reports--KGS

The Millerstown 7.5-minute quadrangle is located south of Louisville and southwest of Elizabethtown along the boundaries between Hardin, Grayson, and Hart Counties and within the Mississippian Plateau physiographic region (McDowell, 1986). Topography is characterized by the low relief Pennyroyal plain that sits at altitudes below about 650 ft above sea level, the low relief Mammoth Cave plateau at altitudes above about 650 ft, and steep slopes of and isolated knobs of the incised Dripping Springs escarpment that separates the two plains. Moore (1965) mapped the bedrock geology of the quadrangle, which was later digitized by Johnson (2006). Mississippian bedrock and …

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Impact Of Type And Shape On The Transport Of Microplastics In Column Experiments, Cheyanne Amanda Schenkel Jan 2022

Impact Of Type And Shape On The Transport Of Microplastics In Column Experiments, Cheyanne Amanda Schenkel

Graduate Research Theses & Dissertations

The pervasive nature of plastic and the longevity of plastic compounds leaves a legacy of plastics and microplastics (MPs) that contaminate our environment, including drinking water sources. Although MPs have been well documented in every environmental setting, a paucity of research has focused on the transport and fate of MPs in groundwater systems. Previous field and lab studies have shown that MPs can migrate through aquifer material and that their retention and retardation are influenced by changing environmental factors. This study used coarse, well-sorted sand in controlled column experiments to investigate the influence of polymer type (PA, PE, PP, PEST) …

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Analysis Of Deformation Near Salt Structures: Geomechanical Modeling And Case Studies From The Paradox Basin, Utah, And Flinders Ranges, South Australia, Mackenzie Anne Wegmann Jan 2022

Analysis Of Deformation Near Salt Structures: Geomechanical Modeling And Case Studies From The Paradox Basin, Utah, And Flinders Ranges, South Australia, Mackenzie Anne Wegmann

Graduate Research Theses & Dissertations

This thesis utilizes detailed field studies and numerical simulations to characterize near- salt deformation patterns. Establishing possible deformation patterns and their evolution helps to constrain assumptions within geomechanical models and aids in the evaluation of prospects that rely on trapping at or near the salt-sediment interface. For the field studies, I use a combination of mesoscopic structural analysis, drone photogrammetry, and 3D modeling to analyze variation in deformation patterns at a scale of meters to hundreds of meters along transects moving horizontally away from the salt-sediment interface adjacent to the western end of the Onion Creek salt diapir (OCSD) in …

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Microfabric Analysis Of Mid-Pliocene Amundsen Sea Interglacial Sediments Demonstrates A Link Between Iceberg Melt And Diatom Productivity (Iodp Exp. 379), Heather Leanne Furlong Jan 2022

Microfabric Analysis Of Mid-Pliocene Amundsen Sea Interglacial Sediments Demonstrates A Link Between Iceberg Melt And Diatom Productivity (Iodp Exp. 379), Heather Leanne Furlong

Graduate Research Theses & Dissertations

Anthropogenically induced climate change in the polar regions has rapidly become an emergent global issue, especially for low-lying coastal communities, which are most affected by sea-level rise. The future of the West Antarctic Ice Sheet (WAIS) is of significant concern due to its history of instability and retreat, especially in light of the observed ongoing changes. Establishing rates of retreat is critical to forecasting future behavior of the WAIS, and previous studies have been unable to establish rates of ice sheet collapse in part because Antarctic continental shelf records are impacted by erosional hiatuses. In 2019, International Ocean Discovery Program …

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Evaluating Holocene Precipitation Variability In The Baltic Region Using Oxygen Isotopes Of Lacustrine Carbonate From Estonia, Maxwell Gordon Boes Jan 2022

Evaluating Holocene Precipitation Variability In The Baltic Region Using Oxygen Isotopes Of Lacustrine Carbonate From Estonia, Maxwell Gordon Boes

Graduate Research Theses & Dissertations

A high-resolution Holocene record of groundwater isotopic composition from eastern Europe enhances the current understanding of ocean atmosphere interactions and moisture transport dynamics. In the modern system, it has been established that the amount of regional winter precipitation is driven by the strength and direction of the sea level atmospheric pressure gradient over the Atlantic Ocean. This is defined by the North Atlantic Oscillation (NAO) index, that shows a positive correlation with precipitation amount during the cold season. This study aims to discover the link between atmospheric dynamics and the ratio of warm season to cold season precipitation through the …

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Assessing The Effects Of Instream Large Wood On Floodplain Aquifer Recharge And Storage At Indian Creek, Kittitas County, Washington, Usa, Stephen Bartlett Jan 2022

Assessing The Effects Of Instream Large Wood On Floodplain Aquifer Recharge And Storage At Indian Creek, Kittitas County, Washington, Usa, Stephen Bartlett

All Master's Theses

Numerous stream restoration projects in the Yakima River Basin in Washington have placed large wood (LW) into tributary channels. One intended effect is to divert water onto floodplains to increase groundwater (GW) recharge and seasonal storage in shallow alluvial aquifers during spring high flows with the intention of releasing GW into streams during the drier summer months. Large wood was emplaced in the Indian Creek tributary of the Teanaway River in Kittitas County, Washington beginning in 2016. Potential changes in the groundwater recharge in the adjacent floodplain before and after the LW installation were investigated through stratigraphic analysis, stream-flow modeling, …

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Detecting Impacts Of Historic And Undocumented Landslide Tsunamis At High Latitude Sites Using Ndvi, Trent Adams Jan 2022

Detecting Impacts Of Historic And Undocumented Landslide Tsunamis At High Latitude Sites Using Ndvi, Trent Adams

All Master's Theses

In the last century most of the largest landslide tsunamis on record have occurred in remote regions of the world, which has led to a limited understanding of their impacts on landscapes. The goal of this work is to present a methodology to identify impacts of landslide tsunamis with a technique that does not require field work in extremely remote locations. Although landslide tsunamis have occurred that were not directly witnessed by anyone, evidence of landslide tsunamis can still be observed via satellite. Using multispectral satellite images, we calculated normalized difference vegetation index (NDVI) to identify tsunami-impacted sites, estimate tsunami …

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Testing Xrf Identification Of Marine Washover Sediment Beds In A Coastal Lake In Southeastern Texas, Usa, Harry F. L. Williams, Chelsea E. Beaubouef, Kam-Biu Liu, Nicholas Culligan, Lance Riedlinger Jan 2022

Testing Xrf Identification Of Marine Washover Sediment Beds In A Coastal Lake In Southeastern Texas, Usa, Harry F. L. Williams, Chelsea E. Beaubouef, Kam-Biu Liu, Nicholas Culligan, Lance Riedlinger

Faculty Publications

This study tests the ability of a novel approach to identifying washover beds in coastal lakes. Combined X-Ray Fluorescence (XRF) and cluster analysis was used to identify hurricane washover beds in sediment cores from Clam Lake on the McFaddin National Wildlife Refuge in southeastern Texas. The lake is known to contain washover beds from recent hurricanes, but the washover sediment has similar microfossil, loss-on-ignition and textural characteristics to non-washover sediment and is not readily distinguishable. Sediment cores taken from marshes surrounding the lake do contain visually-recognizable sandy washover beds of Hurricanes Ike, Rita, Carla and Audrey. XRF analysis of these …

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Response Of Soil Biochemical And Physical Properties To Long Term Prairie Cordgrass And Kura Clover Intercropping System, Vaishnavi Varikuti Jan 2022

Response Of Soil Biochemical And Physical Properties To Long Term Prairie Cordgrass And Kura Clover Intercropping System, Vaishnavi Varikuti

Electronic Theses and Dissertations

Prairie cordgrass (Spartina pectinata) (PCG) is a warm-season perennial grass that can be used as a biofuel feedstock and can be grown on marginal lands. Previous studies on intercropping of a perennial legume i.e., kura clover (Trifolium ambiguum) (KC) with PCG can improve soil biochemical properties, increase biomass production, mitigate greenhouse gas (GHG) emissions while reducing the chemical fertilizer requirement. However, there is a lack of evidence about the effects of PCG production on soil biochemical and physical properties during the cropping season and at deeper soil depths in reference to support plant growth, environmental implications and enhance the soil …

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The Significance Of A New 11,000-Year Volcanic Record From The South Pole And Inferences From Comparisons With Other Volcanic Records, Derek Lee Brandis Jan 2022

The Significance Of A New 11,000-Year Volcanic Record From The South Pole And Inferences From Comparisons With Other Volcanic Records, Derek Lee Brandis

Electronic Theses and Dissertations

Snow accumulation at the polar regions of the planet preserves chemical substances from the atmosphere creating natural archives. Records of the atmospheric environment including atmospheric chemical composition and the climate can be reconstructed from ice cores from the polar ice sheets. Sulfur emitted by explosive volcanic eruptions is preserved as sulfate in polar snow and can be used to reconstruct the record of volcanic eruptions. Since large volcanic eruptions impact the environment and climate, records of volcanic eruptions from ice cores can help us to study and understand climate change and model the future climate environment. A 1750-m ice core …

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Machine-Learning And Meta-Analysis Techniques To Quantify And Predict Soil Organic Carbon, N2O-N And Co2-C Emissions In Cover Crop Systems, Deepak Raj Joshi Jan 2022

Machine-Learning And Meta-Analysis Techniques To Quantify And Predict Soil Organic Carbon, N2O-N And Co2-C Emissions In Cover Crop Systems, Deepak Raj Joshi

Electronic Theses and Dissertations

People worldwide are challenged by multiple threats including climate change, growing populations, and soil degradation. Addressing these challenges requires understanding of the local environment, farming systems and modern technologies. These technologies include new ways to process information that include artificial intelligence, machine learning and meta-analysis. Models produced using these technologies may be useful for predicting the consequences of implementing conservation practices that reduce GHG emissions as well as for determining the carbon footprint of cropping systems that include environmentally friendly conservation technologies such as growing cover crop. Therefore, our objectives of this study were to: 1) provide an overview of …

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The Naming Of Homo Bodoensis By Roksandic And Colleagues Does Not Resolve Issues Surrounding Middle Pleistocene Human Evolution, Eric Delson, Chris Stringer Jan 2022

The Naming Of Homo Bodoensis By Roksandic And Colleagues Does Not Resolve Issues Surrounding Middle Pleistocene Human Evolution, Eric Delson, Chris Stringer

Publications and Research

Roksandic et al. (2022) proposed the new species name Homo bodoensis as a replacement name for Homo rhodesiensis Woodward, 1921, because they felt it was poorly and variably defined and was linked to sociopolitical baggage. However, the International Code of Zoological Nomenclature includes regulations on how and when such name changes are allowed, and Roksandic et al.'s arguments meet none of these requirements. It is not permitted to change a name solely because of variable (or erroneous) later use once it has been originally defined correctly, nor can a name be modified because it is offensive to one or more …

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Mineral Displays As Embodiments Of Geologic Thought And Colonial Invisibility, Selby Hearth, Carrie Robbins Jan 2022

Mineral Displays As Embodiments Of Geologic Thought And Colonial Invisibility, Selby Hearth, Carrie Robbins

Geology Faculty Research and Scholarship

Mineral displays embodied how we think about minerals: as symbols of social status, scholarly tools, theological objects, and instruments of education. Mineral displays are also representations of how we don’t think about minerals: as human products embedded in wider human histories. This paper reviews the historical themes in mineral display, from the cabinets of curiosity of the Renaissance to modern museums, and articulates a major narrative that has been omitted from mineral display traditions: the human processes that bring mineral specimens from the ground to the display case, particularly Western colonialism and labour. Historically, mineral displays have been used to …

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Influence Of Bedrock Erodibility On Orogen Evolution In Collisional Systems And Implications For Geodynamic Models, Stephanie Ann Sparks Jan 2022

Influence Of Bedrock Erodibility On Orogen Evolution In Collisional Systems And Implications For Geodynamic Models, Stephanie Ann Sparks

Theses and Dissertations--Earth and Environmental Sciences

Theoretical and numerical geodynamic models of continental collisional systems often involve, either explicitly or implicitly, a necessary yet complicated dependence between tectonics and erosion; however, the exact nature of these relationships remains elusive and controversial. In such models for the Himalayan-Tibetan (H-T) collisional orogen, surface processes are theorized or in some cases required to play an essential role in modulating critical processes active in the evolution of that system. To investigate, at least to first order. these interactions between climate and tectonics, we generate a simplified landscape evolution model of an actively uplifting orogenic wedge acted upon by surface processes. …

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Mapping Of Microseismic Aftershock Sequences Following The 2017 Lincoln, Montana M 5.8 Earthquake, Reyer M. Fenoff Jan 2022

Mapping Of Microseismic Aftershock Sequences Following The 2017 Lincoln, Montana M 5.8 Earthquake, Reyer M. Fenoff

Undergraduate Theses, Professional Papers, and Capstone Artifacts

The Rocky Mountains of western Montana have long been experiencing tectonic compression and extension that has shaped much of western North America. This activity consistently produces seismic events, like the 6 July 2017 M 5.8 earthquake 11 km southeast of Lincoln, MT, which can be used to advance understanding of crust and mantle dynamics and structure. Seismic mapping is vital to understanding structure and tectonic activity in western Montana as well as in analogous locations across the world. Recently deployed seismometers from the University of Montana as well as the Montana Regional Seismic Network (MRSN) from the Montana Bureau of …

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Spatial Geochemical Changes In Central And East Texas Soils Over Time Resulting From Human Decomposition, Isabela Marisol Overturf Jan 2022

Spatial Geochemical Changes In Central And East Texas Soils Over Time Resulting From Human Decomposition, Isabela Marisol Overturf

CMC Senior Theses

Human decomposition is studied to aid forensic investigations and better understand the impact of cemeteries on urban resources like soil and groundwater. The purpose of this study was to identify changes in soil geochemistry at and around a human grave to search for lateral nutrient movement and possibly identify new patterns in elemental concentrations that could be used in estimating post-mortem intervals (PMIs). At the Forensic Anthropology Research Facility (FARF) at Texas State San Marcos, soil samples were collected from a shallow grave over the course of 54 days to conduct analysis for organic matter content, texture, pH, and bulk …

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Mapping, Fieldwork, And The Moravian Archives, Mark J. Sciuchetti Jan 2022

Mapping, Fieldwork, And The Moravian Archives, Mark J. Sciuchetti

Research, Publications & Creative Work

Moravian maps are important representations of the way eighteenth-century Moravians navigated, lived, and how they understood space and place. To explore these connections, the author discusses the benefits and limitations of examining and georectifying historical maps by cartographers such as Andreas Hoeger, Philipp Christian Gottlieb Reuter, and Georg Wenzeslaus Golkowsky.

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Morphometric Quantification Of Cockpit Karst In A Jamaican Bauxite Mining Concession, M Sean Chenoweth Jan 2022

Morphometric Quantification Of Cockpit Karst In A Jamaican Bauxite Mining Concession, M Sean Chenoweth

Research, Publications & Creative Work

A digital surface model (DSM) is used to characterize the landscape and topical karst landforms within a bauxite mining lease in north central Jamaica. Five case study sites are selected for detailed geomorphic analysis and cartographic visualization using a GIS. In Jamaica, tropical cockpit karst landscapes are composed of several landforms: cockpits, glades, corridors, saddles, and talus slopes. Evidence for the existence and quantification of these landforms is provided in this paper. Study sites have a mean basin area of 96,514 m2 , an average highest elevation of 541 m, mean lowest point of 444 m, with an average enclosed …

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A Comparison Of Deep Learning Algorithms On Image Data For Detecting Floodwater On Roadways, Sarp Salih, Kuzlu Murat, Zhao Yanxiao, Cetin Mecit Jan 2022

A Comparison Of Deep Learning Algorithms On Image Data For Detecting Floodwater On Roadways, Sarp Salih, Kuzlu Murat, Zhao Yanxiao, Cetin Mecit

Engineering Technology Faculty Publications

Object detection and segmentation algorithms evolved significantly in the last decade. Simultaneous object detection and segmentation paved the way for real-time applications such as autonomous driving. Detection and segmentation of (partially) flooded roadways are essential inputs for vehicle routing and traffic management systems. This paper proposes an automatic floodwater detection and segmentation method utilizing the Mask Region-Based Convolutional Neural Networks (Mask-R-CNN) and Generative Adversarial Networks (GAN) algorithms. To train the model, manually labeled images with urban, suburban, and natural settings are used. The performances of the algorithms are assessed in accurately detecting the floodwater captured in images. The results show …

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Exploring The Untapped Gas Potential Of Ghazij Shale In Pirkoh Area, Pakistan: Integratedapproach Of Attribute Analysis And Maturity Modeling, Muhammad Raiees Amjad, Sarfraz Khan, Umair Bin Nisar, Urooj Shakir, Khawar Ashfaq Ahmed Jan 2022

Exploring The Untapped Gas Potential Of Ghazij Shale In Pirkoh Area, Pakistan: Integratedapproach Of Attribute Analysis And Maturity Modeling, Muhammad Raiees Amjad, Sarfraz Khan, Umair Bin Nisar, Urooj Shakir, Khawar Ashfaq Ahmed

Turkish Journal of Earth Sciences

A correlative maturity study integrated with seismic attributes for determining the shale gas potential of Ghazij Formation is carried out. Analysis of post-stack seismic attributes has been frequently used to identify areas of high exploration potential within shale resource plays. Seismic and well data have been utilized for the analysis of maturity trends in the shale facies of Ghazij Formation. Total organic carbon content (TOC), burial history, Vitrinite Reflectance (Ro), thermal history and porosity values have been computed at Pirkoh-01 well, which are laterally compared with the maturity results in Bambor and Sui areas. In addition, analysis is carried out …

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Mineralogical And Paleobotanical Investigations Of Oligo-Miocene Petrified Wood Fromthe Southwest Of Thrace Basin (Nw Turkey), Burcu Üner, Sabah Yilmaz Şahi̇n, Ünal Akkemi̇k Jan 2022

Mineralogical And Paleobotanical Investigations Of Oligo-Miocene Petrified Wood Fromthe Southwest Of Thrace Basin (Nw Turkey), Burcu Üner, Sabah Yilmaz Şahi̇n, Ünal Akkemi̇k

Turkish Journal of Earth Sciences

Petrified wood samples are found within terrestrial sediments belonging to the Late Oligocene-Early Miocene Danişmen Formation in Malkara-Keşan located in the southwest of the Thrace Basin. The petrified wood in both regions is usually silicified and partly coalified. The silicification of the Tertiary wood in the Malkara-Keşan region is associated with volcanic activity and coeval sedimentation. Thin sections from petrified wood samples were taken as transverse, tangential, and radial sections. The mineralogicalpetrographic- botanical studies were carried out under a polarizing and botanical microscope. Opal-moganite-chalcedony-quartz, which are different polymorphs of silica, were detected under the microscope in the petrified wood. Results …

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