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Articles 26611 - 26640 of 29719
Full-Text Articles in Physical Sciences and Mathematics
Ua77/1 Alumni, Wku Alumni Relations
Ua77/1 Alumni, Wku Alumni Relations
WKU Administration Documents
WKU's alumni magazine. Contents:
- Dancing on Walls - Governor's Scholars Program
- An Anniversary Gift - Preston Health & Activities Center
- 1990 Alumni Annual Student Phonathon
- A Sturdy Individualist - Virginia Woods
- Turn Your Radio On - WKYU-FM
- Competitive Edge - Miss Kentucky, Miss Western
- Excitement! - 1990 Homecoming
- Mammoth Cave is a Cool Spot in a Hot Summer
Ancient Channels Of The Susquehanna River Beneath Chesapeake Bay And The Delmarva Peninsula, Steven M. Colman, Jeffrey P. Halka, C. Hobbs, Robert B. Mixon, David S. Foster
Ancient Channels Of The Susquehanna River Beneath Chesapeake Bay And The Delmarva Peninsula, Steven M. Colman, Jeffrey P. Halka, C. Hobbs, Robert B. Mixon, David S. Foster
VIMS Articles
Three generations of the ancestral Susquehanna River system have been mapped beneath Chesapeake Bay and the southern Delmarva Peninsula. Closely spaced seismic reflection profiles in the bay and boreholes in the bay and on the southern Delmarva Peninsula allow detailed reconstruction of each paleochannel system. The channel systems were formed during glacial low sea-level stands, and each contains a channel-fill sequence that records the subsequent transgression. The trunk channels of each system are 2 to 4 km wide and are incised 30 to SO m into underlying strata; they have irregular longitudinal profiles and very low gradients within the Chesapeake …
Postulated Evolution Of Platte River And Related Drainages, V. L. Souders, J. B. Swinehart, V. H. Dreeszen
Postulated Evolution Of Platte River And Related Drainages, V. L. Souders, J. B. Swinehart, V. H. Dreeszen
Conservation and Survey Division
No abstract provided.
Hydrogeology And Hydrogeochemistry Of The Tekonsha Moraine And Adjacent Interlobate Deposits In Charleston Township, Kalamazoo County, Michigan, Victor V. Melbardis
Hydrogeology And Hydrogeochemistry Of The Tekonsha Moraine And Adjacent Interlobate Deposits In Charleston Township, Kalamazoo County, Michigan, Victor V. Melbardis
Masters Theses
Hydrogeochemical analyses and hydrogeologic interpretations provide the basis for an understanding of local ground-water flow, in a 12 square mile study area, transected by the Tekonsha Moraine and bound by glaciofluvial deposits. Glacial tills separate an upper and lower aquifer system throughout most of the area.
Degraded and tritiated ground water is present in the lower aquifer system. A negative correlation (-0.62) between tritium concentrations and depth is statistically significant (.04). In this local system, hydrochemical trends are characterized by decreases in sulfate percentages and increases in bicarbonate in the direction of ground-water flow. Statistical evaluation of the hydrochemical data …
The Hydrogeology And Leachate Generation Of An Alum Sludge Lagoon Chesapeake Virginia, Charles M. Darling
The Hydrogeology And Leachate Generation Of An Alum Sludge Lagoon Chesapeake Virginia, Charles M. Darling
OES Theses and Dissertations
In 1986 the City of Chesapeake, Virginia began to dig shallow ponds ("lagoons") to contain alum sludge, a waste generated by the City from the process of treating potable water. Borings at the disposal site reveal that the near-surface geologic units include a thin mud-rich facies which overlies a thick sandy facies, both of which are in the Lynnhaven Member of the Tabb Formation. At 7 meters depth, a clay-rich facies of the Yorktown Formation (Morgarts Beach Member?) underlies the sandy water table aquifer. Water levels from twenty observation wells and two monitoring wells installed into the water table aquifer …
Eolian Sand Deposits In Maine, Joshua Katz
Eolian Sand Deposits In Maine, Joshua Katz
Maine Collection
Eolian Sand Deposits in Maine
by Joshua Katz - Timson, Schepps & Peters, Inc., Hallowell, Maine
Planning Report No.91, August 1990.
"A report prepared for the Maine Critical Areas Program, State Planning Office."
Contents: List of Figures / List of Maps and Tables / Acknowledgements / Introduction / Inland Eolian Sand Deposits / Research Methods / Rating Methods / Significant Criteria / Summary of Results / Significant Eolian Deposits in Maine / Site Descriptions / Recommendations / Glossary / References Cited
Potential Petroleum Reservoir Rocks Of North-Central Oregon, Alfred J. Riddle
Potential Petroleum Reservoir Rocks Of North-Central Oregon, Alfred J. Riddle
Loma Linda University Electronic Theses, Dissertations & Projects
Petroleum explorationists have commonly assumed, based on the presence of volcanic and/or volcaniclastic rock, that regions such as northcentral Oregon do not hold potential as petroleum basins. The typical argument has been that volcanic flows have no effective porosity or permeability and poorly sorted volcaniclastic sediments contain a high percentage of mineralogically unstable grains which are too easily and rapidly altered into clays and zeolites for any significant or effective porosity to be retained.
The objective of this study was to determine if potential petroleum reservoir rocks do exist in north-central Oregon. Through field and laboratory study and by comparing …
Distribution Of Sand Within Selected Littoral Cells Of The Pacific Northwest, Don Joseph Pettit
Distribution Of Sand Within Selected Littoral Cells Of The Pacific Northwest, Don Joseph Pettit
Dissertations and Theses
Beach sand acts as a buffer to wave energy, protecting the shoreline from erosion. Estimates of the quantity and distribution of beach sand in littoral cells of the PNW are critical to the understanding and prediction of shoreline erosion or accretion. This study was initiated in order to: 1) document the distribution of sand in littoral cells of the Pacific Northwest; 2) determine the factors which have brought about these present distributions; and 3) address the relationship of beach sand distribution to shoreline stability.
Gravity Maps, Models And Analysis Of The Greater Portland Area, Oregon, Paul T. Beeson
Gravity Maps, Models And Analysis Of The Greater Portland Area, Oregon, Paul T. Beeson
Dissertations and Theses
Growing concern over earthquakes in the Pacific Northwest has prompted the mapping and location of near surface faults in the Portland area, Oregon. Visible evidence of faults is poor, requiring the use of geophysical methods to assist in mapping and defining structures in the basin. Gravity maps and models may help in addressing this problem.
Two free-air gravity models were produced. The first model constructed from existing data crosses the basin from Petes Mountain northeast to the Columbia River. The second model is from a gravity survey along Forsythe Road near Clackamas Heights.
The line crossing the basin confirms previous …
Metal Mobilization From A Near-Shore Lake Sediment Under Simulated Acidic Groundwater Inputs, Raveendra V. Ika
Metal Mobilization From A Near-Shore Lake Sediment Under Simulated Acidic Groundwater Inputs, Raveendra V. Ika
OES Theses and Dissertations
Simulation of acidic groundwater passing through lake sediments was conducted under controlled conditions in a laboratory. Three sediment cores collected intact from the near-shore region of an acidic lake were subjected to simulated groundwater inputs of initially identical chemistry for a seven day period. Following this period water being used in the simulation for two of the sediment cores was acidified by hydrochloric acid (HC1) addition to examine the ability of these sediments to neutralize acidic groundwater with varying H+ concentration.
Simulated acidic water passing through the sediment cores mobilized significant amounts of metals. The sediment acted as a …
Geochemical Evolution Of Ferruginous Bauxite Deposits In Northwestern Oregon And Southwestern Washington, Joseph Michael Fassio
Geochemical Evolution Of Ferruginous Bauxite Deposits In Northwestern Oregon And Southwestern Washington, Joseph Michael Fassio
Dissertations and Theses
Ferruginous bauxite deposits developed from flows of the Columbia River Basalt Group in northwestern Oregon and southwestern Washington. Samples of the iron pisolite and the gibbsite nodular zones from the upper portion of the weathering profile of drill core from Columbia County, Oregon and Cowlitz County, Washington, were analyzed by instrumental neutron activation. The mineralogy was determined using Xray diffraction and Mossbauer spectroscopy.
The gibbsite nodular zone is above the clay-rich saprolite or relic basalt zone. The nodules contain relic vesicles and well preserved relic plagioclase microlites. Gibbsite occurs with poorly crystalline goethite and hematite in the gibbsite nodular zone. …
Simulation Of Bromide Transport In A Layered Aquifer Using Two-Dimensional And Three-Dimensional Computer Models, Kathleen Michelle Hewitt
Simulation Of Bromide Transport In A Layered Aquifer Using Two-Dimensional And Three-Dimensional Computer Models, Kathleen Michelle Hewitt
Masters Theses
Simulation of a two-well tracer test at a site near Mobile, Alabama was performed and compared with the experimental breakthrough curve. The models used to simulate the test results were the three-dimensional USGS code HST3D and the two-dimensional USGS code MOC. The results of the three-dimensional model were also compared with the results of the two-dimensional model.
The three-dimensional model HST3D predicted the measured breakthrough curve accurately with the exception of early arrival times of the tracer in the withdrawal well. The two-dimensional model MOC did not accurately predict the bromide concentration in the withdrawal well during the two-well test. …
Pliocene And Pleistocene Depositional Environments On The York-James Peninsula, Virginia; A Field Guidebook, Gerald H. Johnson, Carl H. Hobbs Iii
Pliocene And Pleistocene Depositional Environments On The York-James Peninsula, Virginia; A Field Guidebook, Gerald H. Johnson, Carl H. Hobbs Iii
Reports
The late Cenozoic deposits of southeastern Virginia represent a wide variety of depositional environments and record numerous marine transgressions. The formations range in age from Miocene to Holocene. This fieldguide provides an opportunity to visit and sample highly fossilferous marine bay and fluvial-estuarine sediments exposed in river bluffs and borrow pits on the York-James Peninsula.
Geology Of The Butler Basin, Grant And Wheeler Counties, Central Oregon, Martin R. Aguirre
Geology Of The Butler Basin, Grant And Wheeler Counties, Central Oregon, Martin R. Aguirre
Loma Linda University Electronic Theses, Dissertations & Projects
The Butler Basin lies along the John Day River in Central Oregon, astraddle the boundary of Wheeler and Grant counties. Strata exposed in this geomorphic basin, formed by an erosionally breached anticline, range in age from Permo-Triassic to Neogene. The basement rocks of the basin are poorly exposed but lithologically similar to the Permo-Triassic Blue Mountains island-arc rocks which crop out to the south and southeast of the basin in the John Day Inlier. Overlying the basement rocks are Early Cretaceous conglomerates with lenses of sandstone and siltstone informally named the "Goose Rock Conglomerate." Pebble and cobble lithologies present in …
Geology And Economic Potential Of The Muddy Ranch Inlier, North-Central Oregon, Mustafa Kamal
Geology And Economic Potential Of The Muddy Ranch Inlier, North-Central Oregon, Mustafa Kamal
Loma Linda University Electronic Theses, Dissertations & Projects
There has been confusion for many years regarding the lithology and age of the rocks exposed in the Muddy Ranch Inlier in north-central Oregon. Taylor (1960) referred to these rocks as metasediments and informally named them the "Muddy Ranch phyllite". My studies indicate the inlier consists of weakly metamorphosed siltstone, mudstone, and less abundant sandstone.
Due to the absence of fossil evidence, it was not possible to determine the age of these rocks. However, from the stratigraphic setting and correlation with similar rocks exposed along structural trend to both the northeast and southwest, rocks of the Muddy Ranch Inlier may …
Tomlinsonia Stichkania Sp. Nov., A Permineralized Grass From The Pliocene To (?)Pleistocene China Ranch Beds In Sperry Wash, California, William D. Tidwell, E. M. V. Nambudiri
Tomlinsonia Stichkania Sp. Nov., A Permineralized Grass From The Pliocene To (?)Pleistocene China Ranch Beds In Sperry Wash, California, William D. Tidwell, E. M. V. Nambudiri
Faculty Publications
Permineralized specimens of grasses assignable to Tomlinsonia as a new species Tomlinsonia stichkania occur in the China Ranch beds of Pliocene to possible Pleistocene age in Sperry Wash in the Alexander Hills of southeastern California. The round culm of these grasses is generally solid or occasionally hollow with collateral vascular bundles in the distinct outer and indistinct inner rings. Two-ranked leaf sheaths alternately encircle and overlap the culm. Ridges and furrows occur in the abaxial surfaces of the sheaths. The epidermis of the leaf sheaths is similar to that of the culm. The leaf lamina consists of a three-layered mesophyll. …
Paleoenvironmental Analysis Of A Late-Holocene Subfossil Coleopteran Fauna From Starks, Maine, Heather A. Hall
Paleoenvironmental Analysis Of A Late-Holocene Subfossil Coleopteran Fauna From Starks, Maine, Heather A. Hall
Senior Scholar Papers
The Sandy River in central Maine Is flanked along much of its length by low terraces. Approximately 100 kg of sediment from one terrace in Starks, Somerset County, Maine was wet-sieved in the field. Over 1100 subfossil Coleoptera were recovered representing 53 individual species of a total of 99 taxa. Wood associated with the fauna is 2000 +/-80 14C Yr in age (1-16,038). The fauna is dominated by species characteristic of habitats apparent in modern central Maine. The subfossil assemblage is indicative of a wide vartety of environments including open ground (e.g., Harpalus pensylvanicus), dense forest (e.g., pterostichus honestus), aquatic …
The Sedimentology And Stratigraphy Of The Chilhowee Group (Uppermost Proterozoic To Lower Cambrian) Of Eastern Tennessee And Western North Carolina: The Evolution Of The Laurentian - Iapetos Margin, James Daniel Walker
Doctoral Dissertations
The Blue Ridge and Piedmont provinces of the southern Appalachians possess Upper Proterozoic and Lower Paleozoic age sedimentary, metasedimentary, volcanic, and metavolcanic rock thought to represent sedimentation and igneous activity related to the formation of the Iapetos (Proto-Atlantic) ocean. These sequences of strata can be related to the development of the Laurentian - Iapetos margin as seen in the Southern Appalachians. "Rift" phase sequences of the western Blue Ridge, include the Late Proterozoic age Mount Rogers, Catoctin, Grandfather Mountain formations, and the Ocoee Supergroup, which have been interpreted by other workers as representing volcanism and sedimentation in regionally discontinuous, fault-bounded …
Laramide Deformation In Precambrian Granitic Rocks, Northeastern Wind River Range, Wyoming, Mark A. Dubois
Laramide Deformation In Precambrian Granitic Rocks, Northeastern Wind River Range, Wyoming, Mark A. Dubois
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Fractures and faults in the Jakey's Fork area, northeastern Wind River Range, Wyoming, caused by brittle Laramide deformation in the Precambrian granitic basement have been studied in detail at airphoto, outcrop, and thin-section scales. The study area is bounded on the south by the approximately east-west and vertical Jakey's Fork Fault and on the east by the approximately northwest-southeast and vertical Ross Lakes Fault. Both were active during Laramide deformation. Four distinct structural domains, defined by fracture pat terns and proximity to the two major faults nave emerged in this study. The areas are: 1) Along Ross Lakes Fault granite …
Geology, Volcanology, And Petrology Of Cerro Bravo, A Young, Dactic, Stratovolcano In West-Central Colombia, David Tondl Lescinsky
Geology, Volcanology, And Petrology Of Cerro Bravo, A Young, Dactic, Stratovolcano In West-Central Colombia, David Tondl Lescinsky
LSU Historical Dissertations and Theses
The northernmost active Andean volcano, Cerro Bravo is a small, young, and very explosive stratovolcano. Cerro Bravo has produced voluminous tephra deposits, that are found> 30 km away, as well as, pumice flow deposits, block and ash flow deposits, and high-aspect lava flows, which are found proximally to the volcano. There have been eight episodes of activity during the past 6250±110 years (Herd, 1982), with the most recent <200 years ago and the present being a period of quiescence with no visible activity or thermal manifestations. Stratigraphic relationships suggest the occurrence of an initial explosive phase and a concluding effusive phase of activity during individual episodes. The products of volcanic activity at Cerro Bravo are a chemically and mineralogically monotonous suite of medium-K dacite and high-silica andesite (59.2- 67.5% SiO2 pumices and lavas. The dominant phenocrysts present are plagioclase and hornblende (oxyhomblende in lavas) with lesser quantities of orthopyroxene, titanomagnetite, and rare augite and biotite also present. Petrology and eruption dynamics …200>
Geology Of The Si̇vas-Erzi̇ncan Tertiary Basin, H.Tahsin Akti̇mur, M.Ender Teki̇rli̇, M.Emin Yurdakul
Geology Of The Si̇vas-Erzi̇ncan Tertiary Basin, H.Tahsin Akti̇mur, M.Ender Teki̇rli̇, M.Emin Yurdakul
Bulletin of the Mineral Research and Exploration
No abstract provided.
The Fault Trace Of 1953 Yeni̇ce-Gönen Earthquake And The Westernmost Known Extension Of The Naf System In The Bi̇ga Peninsula, Erdal Herece
The Fault Trace Of 1953 Yeni̇ce-Gönen Earthquake And The Westernmost Known Extension Of The Naf System In The Bi̇ga Peninsula, Erdal Herece
Bulletin of the Mineral Research and Exploration
No abstract provided.
Metamorphism And Fission-Track Age Determination Of Apatite Crystals From Demi̇rci̇-Borlu Region, Gördes Submassif Of The Menderes Massifwestern Turkey, Osman Candan, Cahit Helvaci, G. Böhler, G. Walder, T.D. Mark
Metamorphism And Fission-Track Age Determination Of Apatite Crystals From Demi̇rci̇-Borlu Region, Gördes Submassif Of The Menderes Massifwestern Turkey, Osman Candan, Cahit Helvaci, G. Böhler, G. Walder, T.D. Mark
Bulletin of the Mineral Research and Exploration
No abstract provided.
Stromatolites Of The Lower Cambrian Deep Spring Formation; Mount Dunfee, Esmeralda County, Nevada, Lynn Oliver
Stromatolites Of The Lower Cambrian Deep Spring Formation; Mount Dunfee, Esmeralda County, Nevada, Lynn Oliver
UNLV Theses, Dissertations, Professional Papers, and Capstones
The Middle Member of the Lower Cambrian Deep Spring Formation at Mount Dunfee, Nevada contains a diverse assemblage of stromatolites that formed on a tide- and storm-dominated, siliciclastic-influenced, carbonate shelf. The stromatolites formed in a shallow subtidal environment within and near active oolite shoals under strongly focused currents. The stromatolites occur in four different lithofacies: (1) bioherms of digitate stromatolites, (2) bioherms and biostromes of inclined stromatolites, (3) isolated forms of massive and hemispheroidal stromatolites, and (4) a biostrome of cryptomicrobial boundstones. The first three lithofacies are interpreted as microbial reefs. They had topographic relief, formed in active agitated waters, …
A “Drastic” Evaluation Of The Ground-Water Pollution Potential Of Karst Terrain: Lost River Ground-Water Basin, Warren County, Kentucky, David Baize
Masters Theses & Specialist Projects
Karst terrains, such as the Lost River Karst Ground-Water Basin, are extremely vulnerable to ground-water contamination. Seven physical factors: depth to water, recharge, aquifer media, soil media, topography, impact of the vadose zone, and hydraulic conductivity, are evaluated using the DRASTIC system to determine the ground-water pollution potential of the study area. A numerical value is calculated for each of the seven factors, and a map layer for each factor is produced. These layers are then “added” together to produce a DRASTIC ground-water pollution potential map. The effectiveness of each factor in evaluating the pollution potential of karst terrain is …
Impli̇cati̇ons On Geology, Genesis And Ori̇gi̇n Of Çayirli Manganese Deposit, Ankara, Central Anatolia, Vedat Oygür
Impli̇cati̇ons On Geology, Genesis And Ori̇gi̇n Of Çayirli Manganese Deposit, Ankara, Central Anatolia, Vedat Oygür
Bulletin of the Mineral Research and Exploration
No abstract provided.
Geology Of The Balikesi̇r-Bandirma Region (Northwest Anatolia), Petrology Of The Tertiary Volcanism And Its Regional Distribution, Tuncay Ercan, Erdem Ergül, Ferit Akçören, Ahmet Çeti̇n, Salâhi Grani̇t, Jerf Asutay
Geology Of The Balikesi̇r-Bandirma Region (Northwest Anatolia), Petrology Of The Tertiary Volcanism And Its Regional Distribution, Tuncay Ercan, Erdem Ergül, Ferit Akçören, Ahmet Çeti̇n, Salâhi Grani̇t, Jerf Asutay
Bulletin of the Mineral Research and Exploration
No abstract provided.
Features And Origin Of Bi̇lluri̇k Dere (Elaziğ) Mineralizations, Ahmet Şaşmaz, Ahmet Sağiroğlu
Features And Origin Of Bi̇lluri̇k Dere (Elaziğ) Mineralizations, Ahmet Şaşmaz, Ahmet Sağiroğlu
Bulletin of the Mineral Research and Exploration
No abstract provided.
Progressive Brütle-Ductile Deformati̇on Dm The Demi̇rköy Plüton Of The Strandjha Massive Of Thrace – Turkey, M-Atilla Çağlayan, Metin Şengün, Ayhan Yurtsever
Progressive Brütle-Ductile Deformati̇on Dm The Demi̇rköy Plüton Of The Strandjha Massive Of Thrace – Turkey, M-Atilla Çağlayan, Metin Şengün, Ayhan Yurtsever
Bulletin of the Mineral Research and Exploration
No abstract provided.
A New Carbonifereous And Permian Finding In The Karakaya Nappe, Erdin Bozkurt
A New Carbonifereous And Permian Finding In The Karakaya Nappe, Erdin Bozkurt
Bulletin of the Mineral Research and Exploration
No abstract provided.