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Articles 31 - 60 of 87
Full-Text Articles in Entire DC Network
Reinvestigation Of A Hydrogeologic Feasibility Study For A Proposed Surface Water Reservoir In Smith County, Mississippi, William Dennis Mcbryde
Reinvestigation Of A Hydrogeologic Feasibility Study For A Proposed Surface Water Reservoir In Smith County, Mississippi, William Dennis Mcbryde
Theses and Dissertations
The United States Forest Service desires to build a 2,700 acre surface water reservoir by constructing a dam to impound water on Oakohay Creek in Smith County, Mississippi. A previous study from 2007 deemed the proposed location based on the hydrologic and geologic characteristics. The reinvestigation study objectives focused on the site’s hydrology and geology. The hydrologic study was accomplished by developing daily water storage models for the proposed reservoir. Archived data from the Southern Regional Climate Center were used in the models. The geologic study evaluated the Glendon Limestone through field surveying, ground penetrating radar, sonic rig drilling, surface …
Interpretation Of Well Test Data From Two Hydraulically Communicating Reservoirs, Bander Ibrahim Al Quaimi
Interpretation Of Well Test Data From Two Hydraulically Communicating Reservoirs, Bander Ibrahim Al Quaimi
Graduate Theses, Dissertations, and Problem Reports (ETD)
Naturally fractured reservoirs (NFR) have been receiving more attention than ever since the beginning of the last decade due to various reasons. The current understanding is not sufficient to achieve a favorable recovery factor due to the complexity associated with the fracture characterization and the dynamic behavior of the fractured system. The majority of the fractured reservoirs are developed. Therefore, before proceeding into secondary or possibly tertiary recovery processes a thorough understanding must be reached to avoid undesirable results. The huge reserve volume present in fractured oil and gas reservoirs motivate engineers, researchers, and geoscientists to exert additional efforts to …
Mineral Chemistry Of Some Agates From Gurasada (Mures Valley, Romania), Ovidiu G. Iancu, Dorel P. Toda, Gabriela Iancu
Mineral Chemistry Of Some Agates From Gurasada (Mures Valley, Romania), Ovidiu G. Iancu, Dorel P. Toda, Gabriela Iancu
Studia UBB Geologia
The paper presents the study of some agates from the Gurasada area (Mures Valley, West Romania) and their igneous host rocks. Agates occur in the vesicles of strongly altered pyroclastic rocks (“banatites”), such as basaltic andesites, trachyandesites, trachytes and dacites or in the alluvial sediments along the Gurasada valley. The age of host-rocks is Late Cretaceous-Early Paleogene. Agates consist mainly of various types of α-quartz such as: chalcedony, quartzine and microquartz, associated with moganite. The genesis of agates is related with the hydrothermal solutions which altered the host-rocks.
Passages, Volume 10, No. 2, Summer 2009, Joe Mitchell
Passages, Volume 10, No. 2, Summer 2009, Joe Mitchell
Texas Cave Management Association
Contents: TCMA: Cavers Protecting Caves -- View from the Palit -- Deep & Punkin Caves: Two Texas Classics -- TCMA -- Ezell's Cave: Home of the Blind Monster -- Godwin Ranch: Habitat for Endangered Species -- Rolling Oaks: A Small Preserve Protecting Small Creatures -- Robber Baron: History, Mystery, and Restoration -- Deep and Punkin Cave Survey Update -- LIDAR Mapping the Devil's Sinkhole -- Linda Palit: Highlights from a Lifetime of Caving -- LIDAR -- A Geology Field Trip to Deep & Punkin Caves -- RBC -- Whirlpool Preserve -- Lost Oasis Preserve -- TCMA Supports the 15th ICS …
Paleoclimate Of The Late Oligocene Arctic Ocean: Molluscan Isotopic And Biotic Evidence, Rebecca B. Port
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 …
Reservoir Characterization And Outcrop Analogs To The Navajo Sandstone In The Central Utah Thrust Belt Exploration Play, Ashley Dalrymple
Reservoir Characterization And Outcrop Analogs To The Navajo Sandstone In The Central Utah Thrust Belt Exploration Play, Ashley Dalrymple
Theses and Dissertations
Reservoir heterogeneity plays an important role in oil field economics and completion strategies. We herein characterize the reservoir heterogeneity of the Early Jurassic Navajo Sandstone in the Justensen Flat/Devils Canyon area of the San Rafael Swell, Utah. These outcrops are located approximately 60 kilometers (45 mi) east of the recently discovered Covenant oil field which is located in the central Utah thrust belt exploration play. The reservoir for the Covenant field is the Navajo Sandstone. This study can serve as an outcrop analogue for this developing play and other eolian reservoirs worldwide. There are eight facies within the Navajo Sandstone …
The Geology And Hydrology Of A Proposed Impoundment Of The Upper Sand Creek, Choctaw County, Mississippi, Jonathan R. Mcmillin
The Geology And Hydrology Of A Proposed Impoundment Of The Upper Sand Creek, Choctaw County, Mississippi, Jonathan R. Mcmillin
Theses and Dissertations
The Sand Creek watershed, Choctaw County, Mississippi, constitutes a proposed site for a recreational and water management reservoir. Prior to the development of the site, the geology and hydrogeology of the watershed must be investigated to determine suitability for impoundment. Geological cross sections derived from geophysical logs and field exploration provides information regarding facies distributions within the proposed site area. Discharge characteristics of streams provide data concerning surface runoff that can then be related to the amount of water that is beneficial to the reservoir filling and remaining filled. All data collected and the characteristics of the reservoir are mapped …
Geologic Map And Structural Analysis Of The Twin Rocks 7.5 Minute Quadrangle, Wayne County, Utah, Samuel C. Sorber
Geologic Map And Structural Analysis Of The Twin Rocks 7.5 Minute Quadrangle, Wayne County, Utah, Samuel C. Sorber
Theses and Dissertations
A new geologic map of the Twin Rocks 7.5 minute quadrangle primarily located within Capitol Reef National Park, south-central Utah, provides stratigraphic and structural detail not previously available. This map has also been instrumental in understanding the evolution and development of fluvial terraces associated with Sulfur Creek and the structural geology of the backlimb of the Miners Mountain uplift. Nine bedrock stratigraphic formations and eight types of Quaternary deposits were mapped throughout the quadrangle. Bedrock stratigraphy ranges in age from Permian to Jurassic. New details absent on previous geologic maps include members of the Chinle and Moenkopi Formations and the …
Relationship Between Fault Zone Architecture And Groundwater Compartmentalization In The East Tintic Mining District, Utah, Sandra Myrtle Conrad Hamaker
Relationship Between Fault Zone Architecture And Groundwater Compartmentalization In The East Tintic Mining District, Utah, Sandra Myrtle Conrad Hamaker
Theses and Dissertations
The Eureka Lilly fault zone provides an impermeable barrier for groundwater flow in the East Tintic mining district. The fault zone separates two distinct groundwaters that have different temperatures, compositions, and potentiometric surfaces. The damage zone of the fault is an extensive network of interconnected open fractures and fault intersections that provide conduits for groundwater flow in otherwise impermeable units. The fault core breccia has been re-cemented and mineralized, which eliminates porosity in the rock by creating a thick impermeable zone, which has compartmentalized groundwaters across the fault zone. The compartmentalization of groundwater shows that fault zone variability (from strain …
A Uintan (Late Middle Eocene) Flora And Fauna From The Uinta Basin, Utah, Stephen Dee Sandau
A Uintan (Late Middle Eocene) Flora And Fauna From The Uinta Basin, Utah, Stephen Dee Sandau
Theses and Dissertations
Late Middle Eocene time marks one of the most dynamic periods of the Paleogene in the western interior of North America. Analysis of an extensive, new collection of plant, invertebrate, and vertebrae fossils from the Uinta Formation in the Uinta Basin, south of Myton, Utah, USA, provides evidence of environmental change. Paleobotanical specimens are preserved in late stage Uinta Lake sediments and coarse-grained fluvial sediments which are stratigraphically 650 to 660 m above the Green River Formation. Deposition rates estimates of 18 to 55 cm/kyr, for Uinta Lake sediments in the Uinta Basin suggest a period of 1.18 Ma to …
Dye Tracing Recharge Features Under High-Flow Conditions, Onion Creek, Barton Springs Segment Of The Edwards Aquifer, Hays County, Texas, Brian B. Hunt
KIP Data Sets and Technical Reports
The Barton Springs/Edwards Aquifer Conservation District, in cooperation with the City of Austin, injected non-toxic organic dyes into two caves within the Barton Springs segment of the Edwards aquifer to trace groundwater flow paths and determine groundwater-flow velocities. Antioch and Cripple Crawfish Caves are located about 14.0 and 17.5 miles south, respectively, of Barton Springs, the primary discharge point from the aquifer. Twenty-five pounds of sodium fluorescein were injected into Antioch Cave on August 2, 2002 and arrived at Barton Springs between 7 to 8 days after the injection. Thirty-five pounds of eosine were injected into Cripple Crawfish Cave on …
Integrating Visible, Near Infrared And Short Wave Infrared Hyperspectral And Multispectral Thermal Imagery For Geological Mapping At Cuprite, Nevada, Xianfeng Chen
Graduate Theses, Dissertations, and Problem Reports (ETD)
Visible, near infrared (VNIR), and short wave infrared (SWIR) hyperspectral and thermal infrared (TIR) multispectral remote sensing have become potential tool for geological mapping. In this dissertation, a series of studies were carried out to investigate the potential impact of combining VNIR/SWIR hyperspectral and TIR multispectral data for surface geological mapping. First, a series of simulated data sets based on the characteristics of hyperspectral AVIRIS and multispectral TIR MASTER sensors was created from surface reflectance and emissivity library spectra. Five common used classification methods including minimum distance, maximum likelihood, spectral angle mapper (SAM), spectral feature fitting (SFF), and binary encoding …
Computer Modeling Of Geology In The Sparta And Montpelier Quadrangles Of Clay And Chickasaw Counties, Mississippi: A Tantalizing Near Miss, Jason Defibaugh Y Chávez
Computer Modeling Of Geology In The Sparta And Montpelier Quadrangles Of Clay And Chickasaw Counties, Mississippi: A Tantalizing Near Miss, Jason Defibaugh Y Chávez
Theses and Dissertations
This project attempted to combine digital data sets to define and map geologic features in the Sparta and Montpelier quadrangles of Chickasaw and Clay counties in northeastern Mississippi. LANDSAT TM, digital elevation, and soil permeability data was used in conjunction with reference data for the Sparta quadrangle to build a computer model. Variables used in the model were: geology, slope, soil permeability, vegetation indices, the first three bands of a tasseled cap transformation, and drainage frequency. The data used was LANDSAT TM 30 meter imagery, digital elevation models, also at 30 meter resolution, Penn State STASGO soils data, and the …
Microfacies Of The Triassic Limestones In The Piatra Şoimuliu Klippe (Transylvanian Nappes, Rarau Syncline, Eastern Carpathians, Romania), Daniela Alexandra Popescu, Liviu Gheorghe Popescu
Microfacies Of The Triassic Limestones In The Piatra Şoimuliu Klippe (Transylvanian Nappes, Rarau Syncline, Eastern Carpathians, Romania), Daniela Alexandra Popescu, Liviu Gheorghe Popescu
KIP Articles
No abstract provided.
Structural Controls On Megaporosity In Eogenetic Carbonate Rocks: Tinian, Cnmi, Kevin Wayne Stafford
Structural Controls On Megaporosity In Eogenetic Carbonate Rocks: Tinian, Cnmi, Kevin Wayne Stafford
Theses and Dissertations
Tinian and Aguijan, Commonwealth of the Northern Mariana Islands (CNMI), are volcanic, back arc islands in the western Pacific formed by Pacific Plate subduction under the Philippine Plate. The islands are composed of Eocene volcanic cores mantled by Plio-Pleistocene carbonate facies and raised Holocene beach and reef deposits. The entire sequence has been tectonically uplifted and contains high-angle normal faults, while isostatic subsidence and scarp failures overprint tectonic brittle failure features. A cave and karst inventory on Tinian and Aguijan surveyed 114 features and is believed to adequately represent the megaporosity (cave) development. Two distinct cave classes were identified: mixing …
Structure And Petrology Of Windermere Age Intrusions In The Northern Rocky Mountains, Erik W. Burtis
Structure And Petrology Of Windermere Age Intrusions In The Northern Rocky Mountains, Erik W. Burtis
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.
Sedimentology Of Historic And Prehistoric Deposits In The Drainage Basin Of Deep River And Muddy Creek On The Piedmont Of North Carolina, Victoria Leanne Spurgeon
Sedimentology Of Historic And Prehistoric Deposits In The Drainage Basin Of Deep River And Muddy Creek On The Piedmont Of North Carolina, Victoria Leanne Spurgeon
Graduate Theses, Dissertations, and Problem Reports (ETD)
Deep River and Muddy Creek flow across a granitic and volcanic terrain intruded by diabase dikes in the Piedmont physiographic province of central North Carolina. Geoarchaeological and sedimentological investigation of these Piedmont streams included fourteen trenches dug at four floodplain localities. Soils in these trenches were described using standard soil taxonomy and sampled for particle-size, magnetic susceptibility, and mineralogical analyses.;Increased upland erosion rates, after European settlement, left more than a meter of historic sediments in some areas of the floodplains. A paleosol, indicated by an Ab horizon, records the floodplain surface at the time of European contact. This paleosol, dated …
Geology And Timing Of Zinc-Lead-Silver Mineralization, Northern Brooks Range, Alaska, Melanie Beth Werdon
Geology And Timing Of Zinc-Lead-Silver Mineralization, Northern Brooks Range, Alaska, Melanie Beth Werdon
Theses (Unassigned)
The north-central and northwestern Brooks Range of Alaska hosts widespread Carboniferous Zn-Pb-Ag +/- Ba shale-hosted massive sulfide (Sedex) deposits, and Zn-Pb-Ag +/- Cu vein-breccia and disseminated sulfide occurrences. The Sedex deposits are hosted by black carbonaceous shale and siliceous mudstone of the Mississippian to Pennsylvanian Kuna Formation and are spatially associated with minor (e.g. Red Dog) to locally abundant (e.g. Drenchwater) volcanic and hypabyssal intrusive rocks. The vein-breccia and disseminated sulfide occurrences show no obvious igneous association and are hosted by a deformed but only weakly metamorphosed package of Upper Devonian to Lower Mississippian mixed continental and marine elastic rocks …
Geology Of The Oquirrh Mountains, Utah, United States Geological Survey
Geology Of The Oquirrh Mountains, Utah, United States Geological Survey
All U.S. Government Documents (Utah Regional Depository)
The Oquirrh Mountains are located in north-central Utah, immediately south of the Great Salt Lake, in the easternmost part of the Basin and Range physiographic province. The range consists of northerly-trending aligned peaks 56 kilometers long flanked on the west by Tooele and Rush Valleys and on the east by Jordan and Cedar Valleys. The range hosts several of the more prominent base- and precious-metal and desseminated-gold mining areas in the western United States. The 130-year old Bingham porphyry copper mining district, which is of world-class magnitude in the central part of the range, is still active. The Mercur mining …
Lower-Middle Jurassic Through Lower Cretaceous Sedimentology Stratigraphy And Tectonics Of Western Mongolia, Derek John Sjostrom
Lower-Middle Jurassic Through Lower Cretaceous Sedimentology Stratigraphy And Tectonics Of Western Mongolia, Derek John Sjostrom
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.
Tectonic Implications Of Fission-Track Thermochronology And Amphibole Thermobarometry Studies Of The Northern Peninsular Ranges Batholith, Southern California., Peter Gillham George
Tectonic Implications Of Fission-Track Thermochronology And Amphibole Thermobarometry Studies Of The Northern Peninsular Ranges Batholith, Southern California., Peter Gillham George
LSU Historical Dissertations and Theses
Fission-track data from the San Jacinto Mountains and the Palomar Mountain-Escondido study area indicate that the Late Cretaceous history of the Peninsular Ranges batholith is marked by a series of major cooling events. Coupled with geobarometry measurements and field observations, these data allow for a greater understanding of the nature and timing of both local and regional tectonic events. In the eastern Peninsular Ranges, west-vergent thrusting along the Santa Rosa mylonite belt at $\sim$99-94 Ma was followed by major extensional faulting between $\sim$94 and 92 Ma. Amphibole geobarometry of mylonites indicate that $\sim$10-18 km of crustal thickening occurred as a …
Geochronology And Geochemistry Of The Basement Orthogneisses Of The Araguaia Belt, Brazil, Candido A Veloso Moura
Geochronology And Geochemistry Of The Basement Orthogneisses Of The Araguaia Belt, Brazil, Candido A Veloso Moura
Doctoral Dissertations
Orthogneisses representing the basement rocks of the Araguaia belt (AB), Brazil, are exposed in the core of dome-like structures. Gneisses of trondhjemitic, tonalitic, and granodioritic (TTG) composition constitute the Colmeia Complex, while augen gneiss, of granitic composition, is termed Cantao Gneiss (CG). An Archean age is suggested for the TTG gneisses, although the available Rb-Sr ages for these rocks range between 1.8 and 2.6 Ga. A Rb-Sr age of 1.77 Ga for the CG is interpreted either as a crystallization age or a resetting age.
Geochronological and geochemical studies of the orthogneisses of five of these dome-like structures of the …
Cenozoic Volcanism And Extensional Tectonics Of The Timber Hill Map Area Southwestern Montana : Disruption Of A Neogene Paleovalley, Yves Nicholas Garson
Cenozoic Volcanism And Extensional Tectonics Of The Timber Hill Map Area Southwestern Montana : Disruption Of A Neogene Paleovalley, Yves Nicholas Garson
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.
Structural Geology Of The Blackfoot Thrust System In The Cramer Creek Area Missoula County Montana, Patrick H. Reynolds
Structural Geology Of The Blackfoot Thrust System In The Cramer Creek Area Missoula County Montana, Patrick H. Reynolds
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.
Surficial Geology And Morphology Of The Alaskan Central Arctic Coastal Plain, Stuart Elbert Rawlinson
Surficial Geology And Morphology Of The Alaskan Central Arctic Coastal Plain, Stuart Elbert Rawlinson
Theses (Unassigned)
Mapping and analyses have defined the distribution, morphology, character, and age of marine, fluvial, glacial, eolian, and lacustrine sediments of the late Cenozoic Gubik Formation in approximately 12,000 km$\sp2$ of the Alaskan central Arctic Coastal Plain, and allowed interpretations of the depositional, climatic, and tectonic histories. Amino-acid analysis of wood and some shell materials has defined broad age groups: young, middle and old. The old group has been abandoned because of probable leaching of acids or other modification. These groups are the basis for correlation of deposits between areas and have been assigned minimum relative ages. The young group is …
Upper Crustal Structure Of Southern Alaska: An Interpretation Of Seismic Refraction Data From The Trans-Alaska Crustal Transect, Lorraine W. Wolf
Upper Crustal Structure Of Southern Alaska: An Interpretation Of Seismic Refraction Data From The Trans-Alaska Crustal Transect, Lorraine W. Wolf
Geosciences
Seismic refraction and wide-angle reflection data from the U.S. Geological Survey's Trans-Alaska Crustal Transect is used to investigate the upper crustal structure of southcentral Alaska. The data consist of two intersecting refraction lines: the 135-km Chugach profile which follows the E-W strike of the Chugach Mountains and the 126-km Cordova Peak profile which follows the N-S regional dip. The four shots of the Chugach profile and the five shots of the Cordova Peak profile were recorded on 120 portable seismic instruments spaced at 1-km intervals. Interpretation of data from the Chugach terrane indicates that near-surface unconsolidated sediment and glacial ice …
Neogene Basin Evolution In The Southwestern Dominican Republic: A Foraminiferal Study., Peter Paul Mclaughlin Jr
Neogene Basin Evolution In The Southwestern Dominican Republic: A Foraminiferal Study., Peter Paul Mclaughlin Jr
LSU Historical Dissertations and Theses
The Azua Basin sequence is a 2500 m thick Miocene Pliocene regressive interval. Limestones and marls of the Sombrerito Formation, the lowermost unit, ranges from lower Miocene to lowermost upper Miocene. The turbidite sequence of the Trinchera Formation spans an interval from uppermost middle Miocene to lower Pliocene. Blue-green, neritic lower Pliocene siltstones of the Quita Coraza Formation overlie the Trinchera in the seaward part of the basin. Shallow-marine strata in the lower part of the Arroyo Blanco Formation range from uppermost Miocene to middle Pliocene. Principal Components Analysis of rich benthic foraminiferal faunas aided in the recognition of species …
Structural Style Of The Laramide Orogeny, Wyoming Foreland. (Volumes I And Ii), William Gregor Brown
Structural Style Of The Laramide Orogeny, Wyoming Foreland. (Volumes I And Ii), William Gregor Brown
Theses (Unassigned)
This study documents the styles of Laramide structures of the Wyoming foreland, and presents an integrated synthesis of foreland development. Theoretical data and experimental results are compared to field observations, subsurface well control, and geophysical data to judge their application to the foreland. The direction of collision (N40-50E) between the North American and Farallon plates represents the direction of maximum compressive stresses during the Laramide orogeny. A "tectonic front" progressed from west to east across the foreland during Campanian to middle Eocene time. No single model of uplift applies throughout the foreland. Dips of basement faults vary with changes in …
Hydrology And Water Quality Of The Edwards Aquifer Associated With Barton Springs In The Austin Area, Texas, Raymond M. Slade Jr., Michael E. Dorsey, Sheree L. Stewart
Hydrology And Water Quality Of The Edwards Aquifer Associated With Barton Springs In The Austin Area, Texas, Raymond M. Slade Jr., Michael E. Dorsey, Sheree L. Stewart
KIP Data Sets and Technical Reports
Urban development over the Edwards aquifer in the Austin, Texas, area has caused concerns about the availability and quality of water in the aquifer. The study area, the Edwards aquifer that discharges to Barton Springs, includes parts of Travis and Hays Counties and extends from the city of Kyle to the Colorado River. A large part of the aquifer lies within the Austin metropolitan area one of the fastest growing areas in the Nation. As of 1985, only about 30,000 people used water from the aquifer, however, according to recent official city of Austin population projections, about 86,000 more people …
An Overlap Zone Between A Laramide Rocky Mountain Foreland Structure And Sevier-Style Thrust Structures Near Bannack Montana, Larry M. Johnson
An Overlap Zone Between A Laramide Rocky Mountain Foreland Structure And Sevier-Style Thrust Structures Near Bannack Montana, Larry M. Johnson
Graduate Student Theses, Dissertations, & Professional Papers
No abstract provided.