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Articles 1651 - 1680 of 29988
Full-Text Articles in Entire DC Network
255, Scott Brande
255, Scott Brande
All 3D Rock Models
Model 255 - hornfels - metamorphic rock
SketchFab link: https://sketchfab.com/3d-models/255-92eb561fa0234e15b68b1bef86bd3ca7
Petrophysics Characterization With Multiple Sample Scales Of Cuttings, Cores And Well Logs For Different Rock Types, Ogochukwu Azike
Petrophysics Characterization With Multiple Sample Scales Of Cuttings, Cores And Well Logs For Different Rock Types, Ogochukwu Azike
Earth & Environmental Sciences Dissertations - Archive
Petrophysics Characterization with Multiple Sample Scales of Cuttings, Cores and Well Logs for Different Rock Types
Laboratory-based experimental evaluations and nuclear magnetic resonance log data interpretation of carbonates, sandstones and shale rocks enable multi-scale petrophysical parameters characterization for integrated studies that can be applied in both the industry and academia. Numerous studies have been published on pore geometry and connectivity, as well as the diffusivity, migration, and containment of a fluid (oil/gas/water) in different reservoir types. However, despite the importance of diffusion and imbibition as a transport mechanism especially in unconventional resources, the direct measurements of these parameters have been …
Thermochronology And Exhumation Dynamics Of Metamorphic Units In The Salmon River Suture Zone, Jonathan J. Cone
Thermochronology And Exhumation Dynamics Of Metamorphic Units In The Salmon River Suture Zone, Jonathan J. Cone
Graduate Theses/Dissertations
The Salmon River suture zone in western Idaho records the Jurassic-Cretaceous (160-90 Ma) accretion of amalgamated volcanic arc terranes onto the North American continent. Rocks exposed at the surface record burial to depths of more than 20 kilometers, with unclear drivers for uplift and exhumation. Two competing hypotheses have been proposed to explain the transport of deep crustal rocks to the surface: (1) delamination of a dense lithospheric root resulted in rapid isostatic uplift of the crust and (2) exhumation of crustal blocks along thrust faults. To test these models, I present temperature-time (T-t) paths for mid-crustal metamorphic rocks constructed …
Geology Of The Bishop 7.5-Minute Quadrangle And Geophysical Modeling To Constrain Syndepositional Deformation Of The Black Warrior Foreland Basin, Joseph Edward Lane
Geology Of The Bishop 7.5-Minute Quadrangle And Geophysical Modeling To Constrain Syndepositional Deformation Of The Black Warrior Foreland Basin, Joseph Edward Lane
Graduate Theses/Dissertations
The Black Warrior basin is a foreland basin formed by the Ouachita–Appalachian orogeny during the late Paleozoic Era. Mississippian strata record the transition from the carbonate platform within the Tuscumbia Limestone to the clastic-rich units within the overlying Pride Mountain Formation and Hartselle Sandstone. The western and southern-most fringes of the Black Warrior basin are covered by thin, post orogenic Cretaceous sediments of the East Gulf Coastal Plain. Geological mapping of the Bishop 7.5-Minute quadrangle revealed subtle deformation in Mississippian strata in the form of gentle folds (
Origin Of Carbonate Mud Mounds In Southwestern Missouri, Jared Mcavoy
Origin Of Carbonate Mud Mounds In Southwestern Missouri, Jared Mcavoy
Graduate Theses/Dissertations
Small carbonate mud mounds are found in Lower Mississippian strata of southwestern Missouri. These compare favorably with larger mounds, known as Waulsortian mounds, located in the Meuse River valley of southern Belgium. The origin of Waulsortian and similar mounds is unknown, but they commonly are interpreted as accumulations of mud, where the presence of biological organisms responsible for supposed bio-construction remains uncertain. Alternative hypotheses are that these may have been non-cohesive slump or cohesive slide masses. Multiple techniques, including δ13C and δ18O isotopic analyses and unmanned aerial vehicle photography, were used to determine the most feasible working hypothesis. Determining the …
Million-Year Melt-Presence In Mogollon-Datil Volcanic Field Rhyolites: Constraining The Histories Of The Bursum Caldera Resurgent Domes, Ethan Wagner
Graduate Theses/Dissertations
The Mogollon-Datil volcanic field which is located in southwestern New Mexico, is the result of punctuated volcanism and the transition between arc and rift magmatism. The resurgent domes within the 28 Ma Bursum caldera records the transition from rhyolitic to basaltic andesite volcanism that occurred between 27-26 Ma. Using a combination of new zircon U-Pb ages using chemical abrasion isotope dilution thermal ionization mass spectrometry (CA-ID-TIMS) with zircon U-Pb geochronology and trace element contents by laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and whole rock and mineral trace element contents and isotope geochemistry this study investigates the temporal and …
Water Quality Of A Karstic Shallow Aquifer In Greene And Lawrence Counties, Missouri, Claudia Patricia Colmenero Chacon
Water Quality Of A Karstic Shallow Aquifer In Greene And Lawrence Counties, Missouri, Claudia Patricia Colmenero Chacon
Graduate Theses/Dissertations
A water quality investigation in the Springfield Plateau aquifer of Greene and Lawrence counties, Missouri, was conducted. Water samples from eleven springs were collected at regular intervals during 2023 to determine major water quality parameters: total dissolved solids (TDS), alkalinity, calcium (Ca), magnesium (Mg), sodium (Na), sulfate (SO4), chloride (Cl) and nitrate-nitrogen (NO3-N), along with per- and poly-fluorinated alkali substances (PFAS) from spring sediments. Nitrate-nitrogen was analyzed because of the importance for environmental health (e.g. to avoid eutrophication). Springs samples were separated by land use into urban and rural samples. In addition, Springfield Plateau water quality …
Geodatabase And Automation Code Used For Past And Real-Time Dynamic Landslide Hazard Maps In Eastern Kentucky, Nathaniel O'Leary, L. Sebastian Bryson, Jason M. Dortch
Geodatabase And Automation Code Used For Past And Real-Time Dynamic Landslide Hazard Maps In Eastern Kentucky, Nathaniel O'Leary, L. Sebastian Bryson, Jason M. Dortch
Earth and Environmental Sciences Research Data
We developed spatiotemporal landslide hazard maps (LHMs) using soil, hydrologic, and geomorphic parameters from the subaerial infinite slope factor of safety (FS) equation under unsaturated conditions. Soil properties were sourced from the NRCS WSS, while geomorphic variables were derived from a 1.5 m LiDAR-based DEM and ArcGIS Online. Soil moisture from Hydrus-1D, driven by precipitation and evapotranspiration (ET) data from Irrigation Manager, introduced temporal variability. Validation against known landslide sites demonstrated FS accuracy both spatially and temporally, despite some false positives. To reduce false positives and enhance slope stability representation, novel depth-to-bedrock (DTB) and soil root cohesion maps were incorporated …
Battles, Bustles, And Ballots: The Struggle For Michigan Women's Enfranchisement, Anna Bennett
Battles, Bustles, And Ballots: The Struggle For Michigan Women's Enfranchisement, Anna Bennett
Senior Honors Theses and Projects
The struggle for women’s rights was long fought throughout American history and Michigan played a vital role in the movement’s success. This thesis explores three monumental eras that shaped the struggle for women’s suffrage in Michigan, detailing the evolution from the 1860s Civil War Era through the late 19th and early 20th century Progressive Era. The first era highlights how the Civil War provided women opportunities to challenge prevailing gender conventions and express political opinions. The second era examines the 1874 election, when suffrage was on the ballot but ultimately defeated, largely due to the Beecher-Tilton Scandal that tarnished the …
102, Scott Brande
102, Scott Brande
All 3D Rock Models
Model 102 - basalt - ingeous rock
SketchFab link: https://sketchfab.com/3d-models/102-d6075cf341ac4bd9b738cc436ee8b796
110, Scott Brande
110, Scott Brande
All 3D Rock Models
Model 110 - rhyolite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/110-3a727823e7f744ea86c0b7c4b815c9bc
117, Scott Brande
117, Scott Brande
All 3D Rock Models
Model 117 - gabbro - igneous rock
SketchFab link: https://sketchfab.com/3d-models/117-7aa0c6791f984aabbd11afd11efae604
118, Scott Brande
118, Scott Brande
All 3D Rock Models
Model 118 - gabbro - igneous rock
SketchFab link: https://sketchfab.com/3d-models/118-1581789f63c4446d9fd60d6a9926f06c
120, Scott Brande
120, Scott Brande
All 3D Rock Models
Model 120 - granite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/120-5fc8bd01a11b4e26b63f971f49205152
125, Scott Brande
125, Scott Brande
All 3D Rock Models
Model 125 - peridotite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/125-492cb73d2ecf4ef099673671533e0fb9
127, Scott Brande
127, Scott Brande
All 3D Rock Models
Model 127 - diorite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/127-21c97cc7e71241d7a9f3925165df9a3f
111, Scott Brande
111, Scott Brande
All 3D Rock Models
Model 111 - andesite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/111-510ba461f1d94a729070b0f30ef0b4e6
128, Scott Brande
128, Scott Brande
All 3D Rock Models
Model 128 - gabbro - igneous rock
SketchFab link: https://sketchfab.com/3d-models/128-3bcbedd3249e4254bffa3233a6977a9e
Daal, Scott Brande
Daal, Scott Brande
All 3D Rock Models
Model DAAL - gabbro - igneous rock
SketchFab link: https://sketchfab.com/3d-models/daal-1-71e1bddbca0b486bb085fd1deb471124
124, Scott Brande
124, Scott Brande
All 3D Rock Models
Model 124 - peridotite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/124-f0f053e2206944f888962f46273686d3
132, Scott Brande
132, Scott Brande
All 3D Rock Models
Model 132 - diorite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/132-330f669b9a684e15a96684a20214ca86
134, Scott Brande
134, Scott Brande
All 3D Rock Models
Model 134 - pumice - igneous rock
SketchFab link: https://sketchfab.com/3d-models/134-c3a2828764bd4e74a43dd32520e0cbf5
130, Scott Brande
130, Scott Brande
All 3D Rock Models
Model 130 - pegmatite - igneous rock
SketchFab link: https://sketchfab.com/3d-models/130-a7623f4cc0c54544bf5bd1180391f007
133, Scott Brande
133, Scott Brande
All 3D Rock Models
Model 133 - pumice - igneous rock
SketchFab link: https://sketchfab.com/3d-models/133-ef1923fe77f84ba0917927dd9eb4334f
Surficial Geologic Map Of The Smiths Grove 7.5-Minute Quadrangle, Kentucky, Meredith Swallom, Bailee Nicole Hodelka, Matthew Massey, Hannah Hayes, Charles Wells Iii, Emily Morris
Surficial Geologic Map Of The Smiths Grove 7.5-Minute Quadrangle, Kentucky, Meredith Swallom, Bailee Nicole Hodelka, Matthew Massey, Hannah Hayes, Charles Wells Iii, Emily Morris
Contract Reports--KGS
The Kentucky Geological Survey (KGS), a state-supported independent research center within the University of Kentucky, is committed to providing accurate and unbiased geologic information on natural resources, environmental issues, and natural hazards in Kentucky. While Kentucky boasts complete coverage by 1:24,000-scale geologic bedrock maps, surficial materials have been largely overlooked, except in regions with thick deposits obscuring the bedrock. Given the increasing trends in economic development and urbanization, detailed surficial geologic mapping has become crucial for supporting geotechnical planning, environmental management, and hazard assessment. In response, KGS has prioritized new, detailed surficial geologic mapping since 2004, specifically targeting areas anticipated …
Modeling Apparent Pb Loss In Zircon U-Pb Geochronology, Glenn R. Sharman, Matthew A. Malkowski
Modeling Apparent Pb Loss In Zircon U-Pb Geochronology, Glenn R. Sharman, Matthew A. Malkowski
Geosciences Faculty Publications and Presentations
The loss of radiogenic Pb from zircon is known to be a major factor that can cause inaccuracy in the U–Pb geochronological system; hence, there is a need to better characterize the distribution of Pb loss in natural samples. Treatment of zircon by chemical abrasion (CA) has become standard practice in isotope dilution–thermal ionization mass spectrometry (ID-TIMS), but CA is much less commonly employed prior to in situ analysis via laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) or secondary ionization mass spectrometry (SIMS). Differentiating the effects of low levels of Pb loss in Phanerozoic zircon with relatively low-precision in situ U–Pb …
Simulation Of Wave Propagation In Granular Particles Using A Discrete Element Model, Syed Tahmid Hussan
Simulation Of Wave Propagation In Granular Particles Using A Discrete Element Model, Syed Tahmid Hussan
College of Graduate Studies: Theses & Dissertations
The understanding of Bender Element mechanism and utilization of Particle Flow Code (PFC) to simulate the seismic wave behavior is important to test the dynamic behavior of soil particles. Both discrete and finite element methods can be used to simulate wave behavior. However, Discrete Element Method (DEM) is mostly suitable, as the micro scaled soil particle cannot be fully considered as continuous specimen like a piece of rod or aluminum. Recently DEM has been widely used to study mechanical properties of soils at particle level considering the particles as balls. This study represents a comparative analysis of Voigt and Best …
Post-Glacial Landscape Evolution Of The Lower St. Croix River Valley: The Enigma Of Glacial Lake Grantsburg, The Osceola Bench, And The St. Croix Dells, Hunter Delikowski
Post-Glacial Landscape Evolution Of The Lower St. Croix River Valley: The Enigma Of Glacial Lake Grantsburg, The Osceola Bench, And The St. Croix Dells, Hunter Delikowski
All Graduate Theses, Dissertations, and Other Capstone Projects
The St. Croix River valley (SCRV) is the product of dyssynchronous glacial advance and retreat of several glacial lobes during regional deglaciation of the Late Pleistocene-Early Holocene transition. Additionally, the SCRV has been dramatically shaped by multiple proglacial lake drainage episodes. Therefore, the SCRV is an important case study to understanding the impacts of proglacial lake spillover processes. However, the magnitude, frequency, timing, duration, and geomorphic impacts of these floods remain enigmatic. We focus on a specific reach of the SCRV, which we name the Lower SCRV for the purpose of this study. The lower SCRV contains several anomalous landforms …
Joint Interpretation Of Ert And Self-Potential Data To Characterize The Subsurface Geology And Hydrodynamics Along The Sutherland Supply Canal And Paxton Siphon Inlet, Paxton, Nebraska., M. K. Aboushanab, D. R. Hallum, R. M. Joeckel
Joint Interpretation Of Ert And Self-Potential Data To Characterize The Subsurface Geology And Hydrodynamics Along The Sutherland Supply Canal And Paxton Siphon Inlet, Paxton, Nebraska., M. K. Aboushanab, D. R. Hallum, R. M. Joeckel
Conservation and Survey Division: Faculty and Staff Publications
No abstract provided.
Earth Mri Western Kentucky Fluorspar District 3d Geological Modeling, Devan M. Robinson, Anna Pearson, John B. Hickman, Georgina Lukoczki, William Morton Andrews Jr.
Earth Mri Western Kentucky Fluorspar District 3d Geological Modeling, Devan M. Robinson, Anna Pearson, John B. Hickman, Georgina Lukoczki, William Morton Andrews Jr.
Research Data--KGS
The Illinois–Kentucky Fluorspar District (IKFD) three-dimensional (3D) geological data model plays a critical role in the EarthMRI IKFD project, which aims to utilize the vast and detailed geologic maps and datasets that the Kentucky and Illinois state geological surveys possess to develop a Geographic Information System (GIS)-based 3D geological framework model for the district. The model serves as a framework in which to view the subsurface geological and geochemical data, and to better comprehend the structural and other geologic processes acting on the region as they relate to the locations of critical minerals. The development of the model will also …