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Articles 1 - 30 of 251
Full-Text Articles in Earth Sciences
Geology Newsletter- 1995, Department Of Geology
Geology Newsletter- 1995, Department Of Geology
Geological and Environmental Sciences News
Vol. 1, No. 20
- Faculty News
- Awards and Scholarships
- Alumni/ Friends/ Former Faculty Notes
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Reconstruction Of Solar Irradiance Since 1610: Implications For Climate Cbange, Judith Lean, Juerg Beer, Raymond S. Bradley
Reconstruction Of Solar Irradiance Since 1610: Implications For Climate Cbange, Judith Lean, Juerg Beer, Raymond S. Bradley
Raymond S Bradley
Solar total and ultraviolet (UV) irradiances are reconstructed annually from J610 to the present. This epoch ~ludes the Maunder Minimmn of anomalously low solar activi1}' (circa 1645-1115) and the subsequent increase to the high levels of the present Modem Maximum. In this reconstruction, the Schwabe (II-year) irradiaoce cycle and a longer term Variability component are determined separately, based on contemporary. solar and stellar monitoring. The correlation of reconstructed solar irradiance and Northern Hemisphere (NIl) surface temperature is 0.86 in the pre-industrial period from 1610 to 1800, implying a predominant solar influence. Extending this correlation to the present suggests that solar …
Tectonic Denudation Of Mesozoic Contractile Structures By A Low-Angle Normal Fault And Associated Faults, Southern White Pine Range, Nevada, Holly Langrock
Tectonic Denudation Of Mesozoic Contractile Structures By A Low-Angle Normal Fault And Associated Faults, Southern White Pine Range, Nevada, Holly Langrock
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Blackrock Canyon area in the southern White Pine Range, Nevada mostly consists of the highly extended upper plate of a low-angle normal fault, the Blackrock fault. The post-31.3 Ma Blackrock fault places upper Paleozoic sedimentary rocks and overlying Tertiary volcanic rocks of the Garret Ranch Group in its hangingwall against a 50 degrees E-dipping homocline of Cambrian through Mississippian rocks in its footwall. The 15 to 30 degrees W-dipping Blackrock fault is non-planar and consists of two fault segments and a pronounced corrugation, the Bull Spring corrugation. These geometric irregularities suggest the slip direction on the fault was east-southeast …
The Petrology Of The Precambrian Roof Pendants Thompson Peak, Sawtooth Mountains, Idaho, Susan Denise Anderson
The Petrology Of The Precambrian Roof Pendants Thompson Peak, Sawtooth Mountains, Idaho, Susan Denise Anderson
Honors Theses
No abstract provided.
Geology And Geochemistry Of Tertiary Volcanic Rocks In The Northern Reveille And Southern Pancake Ranges, Nye County, Nevada, Kelly Brian Rash
Geology And Geochemistry Of Tertiary Volcanic Rocks In The Northern Reveille And Southern Pancake Ranges, Nye County, Nevada, Kelly Brian Rash
UNLV Theses, Dissertations, Professional Papers, and Capstones
The northern Reveille and southern Pancake Ranges, located in the south-central Great Basin, experienced a prolonged history of Tertiary volcanism. Volcanic activity in this area began with the eruption of large-volumes of ash-flow tuffs from calderas of the central Nevada caldera complex. The Reveille Range and the southernmost portion of the Pancake Range are the site of two calderas that are the sources for the tuff of Goblin Knobs and tuff of northern Reveille Range. The tuff of Goblin Knobs (70.4-75.3 wt.% SiO2) erupted from the caldera of Goblin Knobs (25.6 Ma) and is the thickest (~1700 m) …
Evaluation Of Bail-Down Test Methods For Characterizing Free Product Recoverability From An Aquifer, Laura L. Krol
Evaluation Of Bail-Down Test Methods For Characterizing Free Product Recoverability From An Aquifer, Laura L. Krol
Masters Theses
Determination of the occurrence and recoverability of free product impacting the subsurface environment has been an on-going challenge in the environmental industry. A simple and relatively inexpensive test to perform in the field is the free product bail-down test. Many authors have proposed various analysis methods using these data for the determination of different free product characteristics.
The purpose of this project was to determine the comparability and possible validity of bail-down test interpretation methods for predicting hydrocarbon hydraulic conductivity/transmissivity and true free product thickness. Bail-down test data collected from two sites were analyzed and interpreted using methods from the …
A Study On The Causes Of Variations In Transmissivity And Storativity During Pump Tests At Asylum Lake, Paul Joseph Pare
A Study On The Causes Of Variations In Transmissivity And Storativity During Pump Tests At Asylum Lake, Paul Joseph Pare
Masters Theses
Over a two year period, Western Michigan University ran a number of pump tests in the Asylum Lake Area in Kalamazoo, Michigan. The transmissivities and storativities calculated from these tests differed significantly from well to well in any particular test, and from pump test to pump test. Utilizing the computer programs AQTESOLV 3.0 and Aquifer Parameter Estimator, a number of T and S values were calculated. After analysis of the results, the following conclusion was drawn. The main reason for the deviations in the T and S values arose from the mixing of the results of numerous methods (some of …
The Variability Of Carbon Dioxide In The Vadose Zone, John J. Ring
The Variability Of Carbon Dioxide In The Vadose Zone, John J. Ring
Masters Theses
The purpose of this thesis was to observe and attempt to explain the variations of carbon dioxide in the vadose zone of a nature area in southwestern Michigan. Well nests, consisting of discrete soil gas sampling points and temperature probes set at depths ranging from 3 to 53 feet, were constructed in a sandy, glacial outwash plain. Soil samples were collected for analysis of organic carbon content during installation. Soil gas samples were collected periodically from June, 1992 to March, 1993 and analyzed for CO2 and O2 concentrations. Occasionally, samples were collected and analyzed for isotopic C13 …
The Effects Of Air Sparging On Aquifer Hydraulic Conductivity, Hans Neve
The Effects Of Air Sparging On Aquifer Hydraulic Conductivity, Hans Neve
Masters Theses
Air sparging is a relatively new technology used to remove organic contaminants from aquifers. This remediation technique involves injecting into contaminated portions of water table aquifers. Theoretically air sparging will reduce aquifer hydraulic conductivity. Injected air fills some of the available sediment pores, thus restricting the flow of water to the remaining water-filled pore spaces.
The purpose of this study was to measure the reduction in hydraulic conductivity due to air sparging. This was assessed using both laboratory and field techniques. The hydraulic conductivities of several different sediments were determined in the laboratory using a large constant head permeameter modified …
Mafic Volcanism In The Colorado Plateau: Basin And Range Transition Zone, Hurricane, Utah, Alexander Sanchez
Mafic Volcanism In The Colorado Plateau: Basin And Range Transition Zone, Hurricane, Utah, Alexander Sanchez
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Hurricane volcanic field (HVF) is a small-volume (0.48 km3) mafic volcanic field in the Colorado Plateau/Basin & Range Transition Zone located in the eastern part of the St. George basin in southwestern Utah. Strombolian-Hawaiian style eruptions produced thin (10 m) a'a lava flows and cinder (scoria) cones composed of vesicular basalt, bombs and agglutinate. Radiometric dating and geologic relationships demonstrate that the HVF formed over a period of at least 100,000 years. In the upper crust, magma probably rose along joints in sedimentary rocks because chains of volcanic vents follow joint orientation maxima in sedimentary rocks.
Three …
Geochemical Evolution Of A Mid-Miocene Synextensional Volcanic Complex: The Dolan Springs Volcanic Field, Northwestern Arizona, Scott Michael Mcdaniel
Geochemical Evolution Of A Mid-Miocene Synextensional Volcanic Complex: The Dolan Springs Volcanic Field, Northwestern Arizona, Scott Michael Mcdaniel
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Dolan Springs volcanic field (DSV), of northwestern Arizona, is dominated by andesite and basaltic-andesite flows and breccias, with minor amounts of basalt, rhyolite, and ash-flow tuff. Geochemistry is used here as a tool to evaluate the roles and contributions of the lithospheric and asthenospheric mantles to magmatism related to Miocene extension in the Colorado River extension corridor (CREC). The majority of synextensional volcanic rocks in the DSV are geochemically similar to regional trends, but rare tholeiitic basalts erupted near the end of extension. The tholeiites have trace element signatures similar to ocean island basalt (OIB), but have isotopic values …
Determination Of Hydraulic Conductivity And Dispersivity In The Biscayne Aquifer, Taylor Slough, Everglades National Park, Jose Dioscoro Altomia Guardiario Jr.
Determination Of Hydraulic Conductivity And Dispersivity In The Biscayne Aquifer, Taylor Slough, Everglades National Park, Jose Dioscoro Altomia Guardiario Jr.
FIU Electronic Theses and Dissertations
Knowledge of the properties of the Biscayne Aquifer is critical to the understanding of groundwater solute transport problems that affect the Everglades region. To add to our knowledge of the aquifer, geologic logging of cores and hydraulic conductivity measurements were performed in 18 fullypenetrating wells using an electromagnetic borehole flowmeter. Corelogs, ambient flow profiles, and hydraulic conductivity (K) values measured in the study site indicate that the Biscayne Aquifer has a hydraulic conductivity with a geometric mean of 0.18 meter/second and a variance of 2.5 , and can be divided into two distinct layers: the Upper Biscayne Aquifer and the …
Palynological Characteristics Of Near-Shore Shell-Bearing Pliocene Through Holocene Sediments Of Florida, Georgia, And South Carolina, Fredrick J. Rich
Palynological Characteristics Of Near-Shore Shell-Bearing Pliocene Through Holocene Sediments Of Florida, Georgia, And South Carolina, Fredrick J. Rich
School of Earth, Environment, and Sustainability Faculty Publications
Seventeen pollen-bearing samples· from sites in South Carolina, Georgia, and Florida were analyzed for their pollen content. The samples range in age from Late Pliocene to Holocene. The initial objective of the study was to use the samples to help define the age of the physiographic feature known as Trail Ridge. All samples were marine sediments, and many were from marine mollusk-dominated strata. Pollen of Pinus and Quercus were abundant in all samples; Taxodium was abundant in about half of them. Carya, Liquidambar, Compositae, Gramineae, and ChenopodiaceaeAmaranthaceae were present as accessory taxa. Dinoflagellate cysts, microforams, and pyrite were present, or …
Groundwater Study: Toyota Motor Manufacturing, Usa Georgetown, Kentucky, Gary Felton, Lyle V. A. Sendlein, Teri Dowdy, Daryl Hines
Groundwater Study: Toyota Motor Manufacturing, Usa Georgetown, Kentucky, Gary Felton, Lyle V. A. Sendlein, Teri Dowdy, Daryl Hines
KWRRI Research Reports
An eighteen month study of the Toyota Motor Manufacturing (TMM) plant site and the surrounding area was undertaken. The basic charge for this project was to characterize the groundwater that is potentially impacted by the TMM plant site. This included occurrence, flow direction, and, if possible, velocity. Because the area is karstified (has sinkholes, springs, caves, etc.) surface water and groundwater are intimately connected and, hence, surface water was frequently an important component of this work.
Data from TMM construction plans and monitoring work done subsequent to construction were elicited from the various repositories within the TMM infrastructure. Aerial color …
No-Till Sowing Systems In North America With Relevance To Western Australia, K J. Bligh
No-Till Sowing Systems In North America With Relevance To Western Australia, K J. Bligh
Resource management technical reports
No abstract provided.
Geochemistry Of The Boring Lava Along The West Side Of The Tualatin Mountains And Of Sediments From Drill Holes In The Portland And Tualatin Basins, Portland, Oregon, Michelle Lynn Barnes
Geochemistry Of The Boring Lava Along The West Side Of The Tualatin Mountains And Of Sediments From Drill Holes In The Portland And Tualatin Basins, Portland, Oregon, Michelle Lynn Barnes
Dissertations and Theses
Instrumental Neutron Activation Analysis (INAA) was used to identify geochemical groups in Boring Lava along the west side of the Tualatin Mountains, and in sediments of the Portland and Tualatin basins. Samples of Boring Lava were obtained from TriMet drill core collected during planning of the tunnel alignment for the Westside Light Rail line. Additional samples of Boring Lava were collected from outcrops along the west side of the Tualatin Mountains. Samples of sediment from the Tualatin and Portland basins were obtained from drill core collected during an Oregon Department of Geology and Mineral Industries (DOGAMI) Earthquake Hazards Mapping project. …
Late Triassic (Carnian) Unconformity In A Block Of The Latest Cretaceous Volcanic Olistostrome Unit In The Izmir-Ankara Zone, Orhan Kaya, Walid Sadeddin, Demir Altiner, Güssun Akay
Late Triassic (Carnian) Unconformity In A Block Of The Latest Cretaceous Volcanic Olistostrome Unit In The Izmir-Ankara Zone, Orhan Kaya, Walid Sadeddin, Demir Altiner, Güssun Akay
Bulletin of the Mineral Research and Exploration
No abstract provided.
Stratigraphic And Structural Setting Of The Anchimetamorphic Rocks To The South Of Tavşanli (Kütahya, Western Turkey): Relation To The İzmi̇r-Ankara Zone, Orhan Kaya, Walid Sadeddin, Demir Altiner, Engin Meri̇ç, İzver Tansel, Aylin Vural
Stratigraphic And Structural Setting Of The Anchimetamorphic Rocks To The South Of Tavşanli (Kütahya, Western Turkey): Relation To The İzmi̇r-Ankara Zone, Orhan Kaya, Walid Sadeddin, Demir Altiner, Engin Meri̇ç, İzver Tansel, Aylin Vural
Bulletin of the Mineral Research and Exploration
No abstract provided.
Geological Characteristics Of The Aşiköy-Toykondu (Küre-Kastamonu) Massive Sulfide Deposits, Üner Çakir
Geological Characteristics Of The Aşiköy-Toykondu (Küre-Kastamonu) Massive Sulfide Deposits, Üner Çakir
Bulletin of the Mineral Research and Exploration
No abstract provided.
Features Of The Tertiary Volcanizm Observed At Bi̇ga Peninsula And Gökçeada, Tavşan Islands, Tuncay Ercan, Muharrem Satir, Gideon Steinitz, Ayşin Dora, Ender Sarifakioğlu, Christoph Adls, Hans-Jürgen Walter, Talat Yildirim
Features Of The Tertiary Volcanizm Observed At Bi̇ga Peninsula And Gökçeada, Tavşan Islands, Tuncay Ercan, Muharrem Satir, Gideon Steinitz, Ayşin Dora, Ender Sarifakioğlu, Christoph Adls, Hans-Jürgen Walter, Talat Yildirim
Bulletin of the Mineral Research and Exploration
No abstract provided.
Micro-Textural Features Of The Sandstones In The Üzümdere Formation (North Of Akseki̇, Antalya), Turhan Ayyildiz, Erdoğan Teki̇n, Nurettin Sonel, Mehmet Bülbül
Micro-Textural Features Of The Sandstones In The Üzümdere Formation (North Of Akseki̇, Antalya), Turhan Ayyildiz, Erdoğan Teki̇n, Nurettin Sonel, Mehmet Bülbül
Bulletin of the Mineral Research and Exploration
No abstract provided.
New Petrographical Data At The Eastern Part Of Alanya Metamorphites (Anamur, S.Turkey), Veysel Işik, Okan Tekeli̇
New Petrographical Data At The Eastern Part Of Alanya Metamorphites (Anamur, S.Turkey), Veysel Işik, Okan Tekeli̇
Bulletin of the Mineral Research and Exploration
No abstract provided.
Geology Of The Akdağ Massif And Surroundings, Ali Yilmaz, Şükrü Uysal, Yavuz Bedl, Halil Yusufoğlu, Talat Havzoğlu, Ahmet Ağan, Deniz Göç, Nihal Aydin
Geology Of The Akdağ Massif And Surroundings, Ali Yilmaz, Şükrü Uysal, Yavuz Bedl, Halil Yusufoğlu, Talat Havzoğlu, Ahmet Ağan, Deniz Göç, Nihal Aydin
Bulletin of the Mineral Research and Exploration
No abstract provided.
Features And Origin Of The Koçkale-Elaziğ Manganese Mineralizations, Mehmet Altunbey, Ahmet Sağiroğlu
Features And Origin Of The Koçkale-Elaziğ Manganese Mineralizations, Mehmet Altunbey, Ahmet Sağiroğlu
Bulletin of the Mineral Research and Exploration
Koçkale and its vicinity (Elazığ) is composed of four different units. These are; Upper Jurassic-Lower Cretaceous Guleman Group, Campanian-Maastrichtian Yüksekova Complex, Maastrichtian-Lower Eocene Hazar Group and Middle Eocene Maden Complex. The Mn mineralizations of Koçkale are situated in volcanosedmentary rocks of Maden Complex and occur in two types: (1) The mineralizations conformable with volcanosedimentary rocks, are the syngenetic and volcanosedimentary type. This type of mineralizations occur within mudstone and as a constituent of this unit, The mineralized bodies are tense and stratiform shaped. Any alteration related to mineralization is absent. Ore mineral assemblage is pyrolusite, psilomelane, rodokrosite, brauntte, manganite, limonite, …
Tertiary Mollusk Fauna And Stratigraphy Of Pinarhi̇sar (Kirklareli̇) Area, Yeşim İslamoğlu, Güler Taner
Tertiary Mollusk Fauna And Stratigraphy Of Pinarhi̇sar (Kirklareli̇) Area, Yeşim İslamoğlu, Güler Taner
Bulletin of the Mineral Research and Exploration
No abstract provided.
Earth News, Fall 1995, Department Of Earth Science, University Of Northern Iowa.
Earth News, Fall 1995, Department Of Earth Science, University Of Northern Iowa.
Earth News
Inside this issue:
--- Staff News
--- Sigma Gamma Epsilon - Gamma Sigma Chapter
--- Revised Earth Science Seminar, Spring 1995
--- Earth Science Seminar, Fall 1995
--- Graduating Senors - Department of Earth Science
--- Fifth Annual Iowa Space Conference, October 27-28, 1995
--- Spring Trip, 1995
--- News from Alumni
Petrography And Origin Of Dolomites Of Yaniktepe Formation (Upper Cretaceous) In Gürün Autochthonous, Eastern Taurus Turkey, Eşref Atabey
Petrography And Origin Of Dolomites Of Yaniktepe Formation (Upper Cretaceous) In Gürün Autochthonous, Eastern Taurus Turkey, Eşref Atabey
Bulletin of the Mineral Research and Exploration
No abstract provided.
Depositional Conditions Of Pleistocene Alluvial Fan Deposites In The Güzelyurt Basin (Turkish Republic Of The Northern Cyprus), Engin Olgun
Bulletin of the Mineral Research and Exploration
No abstract provided.
Geology, Geochemistry And Geotectonic Setting Of Volcanics Comprising Küre (Kastamonu) Ore Mineralization, Şükrü Koç, Ahmet Ünsal, Yusuf Kağan Kadioğlu
Geology, Geochemistry And Geotectonic Setting Of Volcanics Comprising Küre (Kastamonu) Ore Mineralization, Şükrü Koç, Ahmet Ünsal, Yusuf Kağan Kadioğlu
Bulletin of the Mineral Research and Exploration
No abstract provided.
"A Geological Interpretation Of The Stanley Fault And Other Thrust Faults In Page County, Virginia", Michael James Sarros
"A Geological Interpretation Of The Stanley Fault And Other Thrust Faults In Page County, Virginia", Michael James Sarros
OES Theses and Dissertations
Paleozoic carbonate rocks flooring Page Valley (within Page County) are overthrust by Precambrian to Cambrian elastic rocks of the Blue Ridge to the east of the study area. King (1950) recognized that the Cambrian carbonate sequence of Page Valley, near Stanley, Virginia, is broken by a large transverse fault which he named the Stanley fault. King (1950) interpreted the Stanley fault as a high-angle reverse fault with oblique-slip displacement. However, detailed mapping and structural data collected in this study indicate the Stanley fault is a low angle thrust fault which cuts all pre-Alleghanian and Early Alleghanian structures.
Two previously unrecognized …