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2011

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An Integrated Geophysical And Geologic Study Of The Paleogene-Age Volcanic Body And Possible Landslide Deposit On The South Slope Of The Traverse Mountains, Utah, John C. Hoopes Dec 2011

An Integrated Geophysical And Geologic Study Of The Paleogene-Age Volcanic Body And Possible Landslide Deposit On The South Slope Of The Traverse Mountains, Utah, John C. Hoopes

Theses and Dissertations

Development of homes, roads, and commercial buildings in northern Utah has grown significantly during the last several decades. Construction has expanded from the valley floor to higher elevations of benches, foothills, and other elevated regions of the Wasatch Mountain Front. Construction in the higher elevation areas are a concern due to potential for landslides, both new and reactivated. Landslides have been identified in this region and are dated as Pleistocene to historical in age. A possible landslide of about 0.5 km2 on the south slope of Traverse Mountain has been mapped by the Utah Geological Survey in 2005. Its surface …

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Mesozoic Tectonic History And Geochronology Of The Kular Dome, Russia And Bendeleben Mountains, Seward Peninsula, Alaska, Daniel B. Harris Dec 2011

Mesozoic Tectonic History And Geochronology Of The Kular Dome, Russia And Bendeleben Mountains, Seward Peninsula, Alaska, Daniel B. Harris

Graduate Theses, Dissertations, and Problem Reports (ETD)

The tectonic history responsible for formation of the major basins of the Arctic and movement of landmasses surrounding these basins remains unclear despite multidisciplinary efforts. Most studies focus on one of four potential movement pathways of the Arctic Alaska-Chukotka microplate during the Mesozoic and the relationship between this movement and formation of the Amerasian Basin. Due to difficulty in access and harsh climate of the Arctic Ocean, most geological studies focus on landmasses surrounding the Amerasian Basin. For this reason, we have conducted research in the Kular Dome of northern Russia and the Bendeleben Mountain Range of the Seward Peninsula, …

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The Ringed Crayfish, Orconectes Neglectus Neglectus, In Nebraska With A Revision Of Its Distributional Range, Steven C. Schainost Nov 2011

The Ringed Crayfish, Orconectes Neglectus Neglectus, In Nebraska With A Revision Of Its Distributional Range, Steven C. Schainost

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Collections of crayfishes in Nebraska have yielded much new information on the distribution of the ringed crayfish, Orconectes neglectus neglectus. The distributional range of this species had been described as southwestern Missouri and northwestern Arkansas with extensions into Kansas and Oklahoma. Isolated, disjunct populations in northeastern Colorado, southwestern Nebraska, and northwestern and east-central Kansas were thought to be relict populations. Between 1995 and 2009, collections of crayfishes were made throughout Nebraska using various techniques including seining, trapping, dip-netting, and handgrabbing. To date, the ringed crayfish has been found in 56 streams in eight of Nebraska’s 13 river basins. In …

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Selected Re-Emerging And Emerging Trends In Oil And Gas Law As A Result Of Production From Shale Formations, Jeffrey C. King Oct 2011

Selected Re-Emerging And Emerging Trends In Oil And Gas Law As A Result Of Production From Shale Formations, Jeffrey C. King

Texas Wesleyan Law Review

Taking the statements in the above paragraph as true, there is also another consequence to these developments. There has been a proliferation of oil and gas leasing and drilling in areas that have little prior experience, or little recent experience, with such activities. This has caused a resurgence of oil and gas law and raised issues that have been either dormant or nonexistent. This Article will address some of the re-emerging and emerging oil and gas litigation issues that are the byproduct of shale development activities. Specifically, this Article will discuss: 1. Production in paying quantities and shut-in royalties; 2. …

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Lineage Diversification And Morphological Evolution In A Large-Scale Continental Radiation: The Neotropical Ovenbirds And Woodcreepers (Aves: Furnariidae), Elizabeth P. Derryberry, Santiago Claramunt, Graham Derryberry, R. Terry Chesser, Joel Cracraft, Alexandre Aleixo, Jorge Pérez-Emán, J. V. Remsen, Robb T. Brumfield Oct 2011

Lineage Diversification And Morphological Evolution In A Large-Scale Continental Radiation: The Neotropical Ovenbirds And Woodcreepers (Aves: Furnariidae), Elizabeth P. Derryberry, Santiago Claramunt, Graham Derryberry, R. Terry Chesser, Joel Cracraft, Alexandre Aleixo, Jorge Pérez-Emán, J. V. Remsen, Robb T. Brumfield

Faculty Publications

Patterns of diversification in species-rich clades provide insight into the processes that generate biological diversity. We tested different models of lineage and phenotypic diversification in an exceptional continental radiation, the ovenbird family Furnariidae, using the most complete species-level phylogenetic hypothesis produced to date for a major avian clade (97% of 293 species). We found that the Furnariidae exhibit nearly constant rates of lineage accumulation but show evidence of constrained morphological evolution. This pattern of sustained high rates of speciation despite limitations on phenotypic evolution contrasts with the results of most previous studies of evolutionary radiations, which have found a pattern …

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A Geologic Guide To The Gokyo Ri Trek: Its Hazards, Nepal’S Hindrances, Allison Bolger Oct 2011

A Geologic Guide To The Gokyo Ri Trek: Its Hazards, Nepal’S Hindrances, Allison Bolger

Independent Study Project (ISP) Collection

The purpose of this Independent Research Project is to study the geology of the Gokyo Ri Trek and record it in the form of a publishable, trailside guidebook. This guidebook will not only enhance trekkers’ academic experience with enjoyable, interesting facts about Gokyo’s geology, but will also inform them of the natural hazards all around. From glacial lakes and high mountain peaks to precarious scree slopes and towering ice falls, the geology of Sagarmatha National Park offers more than just rocks and snow. With these natural, yet highly unpredictable wonders and the tourists they attract also comes the power to …

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Analysis And Finite Element Approximation Of A Coupled, Continuum Pipe-Flow/Darcy Model For Flow In Porous Media With Embedded Conduits, Yanzhao Cao, Max Gunzburger, Fei Hua, Xiaoming Wang Sep 2011

Analysis And Finite Element Approximation Of A Coupled, Continuum Pipe-Flow/Darcy Model For Flow In Porous Media With Embedded Conduits, Yanzhao Cao, Max Gunzburger, Fei Hua, Xiaoming Wang

Mathematics and Statistics Faculty Research & Creative Works

We consider the continuum Darcy/pipe flow model for flows in a porous matrix containing embedded conduits; such coupled flows are present in, e.g., karst aquifers. the mathematical well-posedness of the coupled problem as well as convergence rates of finite element approximation are established in the two-dimensional case. Computational results are also provided. © 2010 Wiley Periodicals, Inc.

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Hyperspectral-Based Adaptive Matched Filter Detector Error As A Function Of Atmospheric Profile Estimation, Allan W. Yarbrough Sep 2011

Hyperspectral-Based Adaptive Matched Filter Detector Error As A Function Of Atmospheric Profile Estimation, Allan W. Yarbrough

Theses and Dissertations

Hyperspectral imagery is collected as radiance data. This data is a function of multiple variables: the radiation profile of the light source, the reflectance of the target, and the absorption and scattering profile of the medium through which the radiation travels as it reflects off the target and reaches the imager. Accurate target detection requires that the collected image matches as closely as possible the known "true" target in the classification database. Therefore, the effect of the radiation source and the atmosphere must be removed before detection is attempted. While the spectrum of solar light is relatively stable, the effect …

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Reinvestigation Of A Hydrogeologic Feasibility Study For A Proposed Surface Water Reservoir In Smith County, Mississippi, William Dennis Mcbryde Aug 2011

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 …

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Researchers To Dig Deep Into Wyoming Basin For Global Warming Clues, Beth Potier Jul 2011

Researchers To Dig Deep Into Wyoming Basin For Global Warming Clues, Beth Potier

Media Relations

No abstract provided.

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The Impact Of Modern Weathering On The Geochemistry Of A Marine Permo-Triassic Boundary Section, Jeremy Christopher Williams Jun 2011

The Impact Of Modern Weathering On The Geochemistry Of A Marine Permo-Triassic Boundary Section, Jeremy Christopher Williams

Graduate Masters Theses

The Permian-Triassic Boundary (PTB) marks the end-Permian extinction, the greatest mass extinction recorded in Earth's history. The Attargoo PTB section located in Spiti Valley, Himachal Pradesh, India was situated along the north continental margin of Gondwana-land in the Neo-Tethys Ocean during the end-Permian extinction. In Spiti Valley, PTB sections such as Attargoo are exposed by a thin (~ 2cm) ferruginous layer separating the Permian black shale from Triassic Limestone. Studies that have presented geochemical data to support a theory of the end-Permian extinction lack any interpretation of post-depositional effects on Spiti Valley PTB sections. In order to accurately present a …

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Upper Pleistocene Human Dispersals Out Of Africa: A Review Of The Current State Of The Debate, Amanuel Beyin May 2011

Upper Pleistocene Human Dispersals Out Of Africa: A Review Of The Current State Of The Debate, Amanuel Beyin

Faculty and Staff Scholarship

Although there is a general consensus on African origin of early modern humans, there is disagreement about how and when they dispersed to Eurasia. This paper reviews genetic and Middle Stone Age/Middle Paleolithic archaeological literature from northeast Africa, Arabia, and the Levant to assess the timing and geographic backgrounds of Upper Pleistocene human colonization of Eurasia. At the center of the discussion lies the question of whether eastern Africa alone was the source of Upper Pleistocene human dispersals into Eurasia or were there other loci of human expansions outside of Africa? The reviewed literature hints at two modes of early …

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Memorial To Charles Alexander Baskerville (1928–2009), Allen W. Hatheway, Ajitkumar Shah, Joseph J. Lifrieri, Nazrul I. Khandaker, Stanley Schleifer May 2011

Memorial To Charles Alexander Baskerville (1928–2009), Allen W. Hatheway, Ajitkumar Shah, Joseph J. Lifrieri, Nazrul I. Khandaker, Stanley Schleifer

Publications and Research

Charles Alexander Baskerville captured our imagination, as a senior colleague in the practice of engineering geology in New York City. “Charlie” held the seat of master Big Apple Geologist during his matured career. He was the source, he knew the possibilities, he was aware of the pitfalls of this most geologically complex of American cities. His final work was his greatest reach—the four bedrock geologic quadrangles of the city. Baskerville mapped New York City for more than fifty years. He was sought and given access to sites of bedrock and bedrock/ overburden interface on the various capitol construction projects undertaken …

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Adsorption Of Neodymium Experiment Design To Simulate Nuclear Fuel Reprocessing, Brian C. Froese May 2011

Adsorption Of Neodymium Experiment Design To Simulate Nuclear Fuel Reprocessing, Brian C. Froese

Renée Crown University Honors Thesis Projects - All

The purpose of this project was to develop a laboratory experiment to be conducted by future Nuclear Engineering Track (NET) students that adequately demonstrates adsorption of the lanthanide neodymium, an extraction technique used in nuclear fuel reprocessing. Nuclear fuel reprocessing is the chemical separation of various elemental components in spent nuclear fuel. These components, once isolated, can be recycled or reused and ultimately minimize the volume of radioactive waste. There were several steps taken to accomplish this task. First, an independent study of Dr. Hyung Jun Park’s work on phosphorus based adsorbents was conducted. Research was also done on current …

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Evolution Of Ferric Sulfates With Relative Humidity And Temperature And Their Potential Usage As Environmental Indicators In Martian Research, Wenqian Xu May 2011

Evolution Of Ferric Sulfates With Relative Humidity And Temperature And Their Potential Usage As Environmental Indicators In Martian Research, Wenqian Xu

Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions)

Ferric sulfates have attracted attention of geochemists since the discovery of jarosite on surface of Mars in 2004. To date, several ferric sulfates have been identified or suggested on Mars, including ferricopiapite, paracoquimbite, etc. These ferric sulfates, formed in evaporation or diagenetic processes, serve as mineralogical evidence for past water activity on Mars. More than proving the presence of water, ferric sulfates are hygroscopic and display complex hydration and dehydration transitions with change of air humidity and temperature, which suggest they may have application in tracing paleo-environment on Mars. On Earth, ferric sulfate minerals are environmentally important. Primarily distributed in …

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Formation Of Geomorphic Features As A Response To Sea-Level Change At Ritidian Point, Guam, Mariana Islands, Blaz Miklavic Apr 2011

Formation Of Geomorphic Features As A Response To Sea-Level Change At Ritidian Point, Guam, Mariana Islands, Blaz Miklavic

Theses and Dissertations

Geomorphic features have been one of the major tools for sea-level change studies. The present work shows an example of sea-level change study on karst terrain in the tropics. Sea-level notches as well as flank margin caves were identified in the research area and their elevation measured. The time of formation of the sea-level indicators was constrained by lithology study and dating methods such as facies comparison and U-Th dating. Denudation and uplift were also studied for the same purpose. From this study it can be concluded that sea-level stands within the glacial cycle can cause the formation of flank …

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Active Tectonics In Southern Alaska And The Role Of The Yakutat Block Constrained By Gps Measurements, Julie Elliott Apr 2011

Active Tectonics In Southern Alaska And The Role Of The Yakutat Block Constrained By Gps Measurements, Julie Elliott

Geosciences

GPS data from southern Alaska and the northern Canadian Cordillera have helped redefine the region's tectonic landscape. Instead of a comparatively simple interaction between the Pacific and North American plates, with relative motion accommodated on a single boundary fault, the margin is made up of a number of small blocks and deformation zones with relative motion distributed across a variety of structures. Much of this complexity can be attributed to the Yakutat block, an allochthonous terrane that has been colliding with southern Alaska since the Miocene. This thesis presents GPS data from across the region and uses it to constrain …

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Taxonomy, Nomenclature, And Evolution Of The Early Schubertellid Fusulinids, Vladimir I. Davydov Mar 2011

Taxonomy, Nomenclature, And Evolution Of The Early Schubertellid Fusulinids, Vladimir I. Davydov

Geosciences Faculty Publications and Presentations

The types of the species belonging to the fusulinid genera Schubertella and Eoschubertella were examined from publications and type collections. Eoschubertella in general possesses all the features of Schubertella and therefore is a junior synonym of the latter. However, the concept of Eoschubertella best describes the genus Schubertina with its type species Schubertina curculi. Schubertina is closely related to the newly established genus Grovesella the concept of which is emended in this paper. Besides Schubertella, Schubertina, and Grovesella, the genera Mesoschubertella, Biwaella are reviewed and three new species, Grovesella nevadensis, Biwaella zhikalyaki, and Biwaella poletaevi, are described. The phylogenetic relationships …

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India In Africa: Implications Of An Emerging Power For Africom And U.S. Strategy, J. Peter Pham Dr. Mar 2011

India In Africa: Implications Of An Emerging Power For Africom And U.S. Strategy, J. Peter Pham Dr.

Books, Monographs & Collaborative Studies

This monograph examines India’s rapidly expanding network of influence in Africa. The author analyzes the country’s burgeoning public and private investments in the region as well as its policies vis-à-vis African regional organizations and individual states, especially in the security sector. After reviewing the historic role that India has played in Africa, the author looks at the principal motivations for India’s approach to Africa—including the former’s quests for the resources, business opportunities, diplomatic influence, and security—and Africans’ responses to it. In the context of the broader U.S.-India strategic partnership, as well as American political and security interests in Africa, India’s …

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New Data On The Upper Jurassic–Lower Cretaceous Limestones From Bihor Mountains: Case Study Of Gârda Seacă-Hodobana Region, Romania, Valentin Turi, Emanoil Sasaran, Ioan I. Bucur Jan 2011

New Data On The Upper Jurassic–Lower Cretaceous Limestones From Bihor Mountains: Case Study Of Gârda Seacă-Hodobana Region, Romania, Valentin Turi, Emanoil Sasaran, Ioan I. Bucur

Studia UBB Geologia

This study refers to some problems regarding the lithological succession, facies and carbonate microfacies, and to biostratigraphic markers of the Upper Jurassic-Lower Cretaceous carbonates from Bihor Mountains. Three types of facies (external marginal facies, subtidal and peritidal facies) were separated for the Upper Jurassic, and two (coastal-peritidal and open shelf facies) for the Lower Cretaceous carbonates. The micropaleontological assemblages identified contain species that allow the separation of the two formations of different age: Labyrinthina mirabilis, Kurnubia palastiniensis, Neokilianina rahonensis, Clypeina sulcata (Kimmeridgian-Lower Tithonian) and Parakoskinolina? jourdanensis, Montseciella arabica, Palorbitolina lenticularis, Falsolikanella danilovae (Barremian – Lower Aptian). Field observations and data …

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Profiles In Science For Science Librarians: "What Lives Where, And Why": Alfred Russel Wallace, And The Field Of Biogeography, Charles H. Smith Jan 2011

Profiles In Science For Science Librarians: "What Lives Where, And Why": Alfred Russel Wallace, And The Field Of Biogeography, Charles H. Smith

DLPS Faculty Publications

Biogeography, the study of animal and plant distribution, has a history extending back to at least the eighteenth century. But it was not until the work of Charles Darwin and Alfred Russel Wallace in the mid-nineteenth century that it really came into its own as a science. Darwin’s importance notwithstanding, it was really Wallace who put the field on the map, and many of today’s research threads can be traced back to his influence. This article provides a summary review of Wallace’s life and work and biogeography as a field of study, including Wallace’s role in its development.

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Hydrostratigraphic Interpretation Of Test-Hole And Geophysical Data, Upper Loup River Basin, Nebraska, 2008-10, Christopher M. Hobza, Theodore H. Asch, Paul A. Bedrosian Jan 2011

Hydrostratigraphic Interpretation Of Test-Hole And Geophysical Data, Upper Loup River Basin, Nebraska, 2008-10, Christopher M. Hobza, Theodore H. Asch, Paul A. Bedrosian

United States Geological Survey: Water Reports and Publications

Nebraska's Upper Loup Natural Resources District is currently (2011) participating in the Elkhorn-Loup Model to understand the effect of various groundwater-management scenarios on surface-water resources. During Phase 1 of the Elkhorn-Loup Model, a lack of subsurface geological information in the Upper Loup Natural Resources District, hereafter referred to as the upper Loup study area, was identified as a gap in current knowledge that needed to be addressed. To improve the understanding of the hydrogeology of the upper Loup study area, the United States Geological Survey, in cooperation with the Upper Loup Natural Resources District and the University of Nebraska Conservation …

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Coastal Land Loss And Hypoxia: The 'Outwelling' Hypothesis Revisited, Anindita Das, Dubravko Justic, Erick M. Swenson, R. Euigene Turner, Masamichi Inoue, Dongho Park Jan 2011

Coastal Land Loss And Hypoxia: The 'Outwelling' Hypothesis Revisited, Anindita Das, Dubravko Justic, Erick M. Swenson, R. Euigene Turner, Masamichi Inoue, Dongho Park

Faculty Publications

It is generally believed that interannual variability in the areal extent of the Gulf of Mexico hypoxia is driven primarily by the magnitude of the Mississippi River freshwater and nutrient fluxes. It has recently been proposed that outwelling of carbon from deteriorating coastal wetlands into the surrounding Gulf of Mexico could be an important mechanism promoting the development of hypoxia. We used a coupled hydrology-hydrodynamics model of the Barataria estuary, a site of massive wetland loss, to calculate the fluxes of nitrogen, chlorophyll a and carbon at the estuary-ocean interface. The hydrology model calculates runoff from rainfall and evaporation data, …

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The Arctic Council: Gatekeeper Or Doormat To The World’S Next Major Resource Battle?, Oded Cedar Jan 2011

The Arctic Council: Gatekeeper Or Doormat To The World’S Next Major Resource Battle?, Oded Cedar

PEEL Alumni Scholarship

Over the last decade, a coalescence of different factors has shifted the search for natural resources such as oil and gas to the Arctic. Advances in exploration, drilling, and extraction technologies have helped mitigate the traditionally cost-prohibitive factors of developing ice-locked reserves. Geopolitical concerns about the waning global supply of oil and gas have also driven countries to explore for these resources in the Arctic. However, the primary force behind this focus is the undeniable fact that the Earth’s changing climate is melting away the Arctic’s ice sheet and permafrost, making the region’s oil and gas reserves accessible for the …

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Late Cenozoic Oscillations Of Antarctic Ice Sheets Revealed By Provenance Of Basement Clasts And Grain Detrital Modes In Andrill Core And-1b, Franco M. Talarico, Robert M. Mckay, Ross D. Powell, Sonia Sandroni, Tim Naish Jan 2011

Late Cenozoic Oscillations Of Antarctic Ice Sheets Revealed By Provenance Of Basement Clasts And Grain Detrital Modes In Andrill Core And-1b, Franco M. Talarico, Robert M. Mckay, Ross D. Powell, Sonia Sandroni, Tim Naish

ANDRILL Research and Publications

Petrological investigations of the sand fraction and of granule- to cobble-sized clasts in the Plio-Pleistocene sedimentary cycles of the AND-1B drill core at the NW edge of the Ross Ice Shelf (McMurdo Sound) highlight significant down-core modal and compositional variations. These variations provide: (i) direct information about potential source regions during both glacial maxima and minima; and (ii) evidence of an evolving provenance, documented by long-term shifts in compositional patterns that can be interpreted as reflecting variations in ice volume and ice sheet thermal regimes and changes in paleogeography related to the emergence of several volcanic centers during the deposition …

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Geophysical Reconnaissance Of Karst Sinkhole Occurrences In Jeram, Kinta Valley, West Malaysia After The 2004 Indian Ocean Earthquake, R.F. Muhammad, O. Al-Kouri, R. Yassin, C.N. Lat Jan 2011

Geophysical Reconnaissance Of Karst Sinkhole Occurrences In Jeram, Kinta Valley, West Malaysia After The 2004 Indian Ocean Earthquake, R.F. Muhammad, O. Al-Kouri, R. Yassin, C.N. Lat

Research Publications (2011 to 2015)

Geophysical and geospatial reconnaissance of karst features associated with sinkholes has been carried out in Jeram, Perak, West Malaysia. A rapid increase of sinkholes occurrences were reported after the disastrous 26th Dec. 2004 earthquake in Sumatera. Over 45 sinkholes of various sizes occurred in a small area of the ex-mine land. Many cavities are present in the subsurface karst that is covered by thin layers of loose sands and clay materials. These cavities are thought to be pre-existing features that had been rapidly filled with sand/clay, due to the tremor triggered from the earthquake.

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Chronology And Ecology Of Late Pleistocene Megafauna In The Northern Willamette Valley, Oregon, Daniel Mcgowan Gilmour Jan 2011

Chronology And Ecology Of Late Pleistocene Megafauna In The Northern Willamette Valley, Oregon, Daniel Mcgowan Gilmour

Dissertations and Theses

This study is an investigation of the timing of extinction of late Pleistocene, large bodied mammalian herbivores (megafauna) and of the environment in which they lived. The demise of the megafauna near the end of the Pleistocene remains unexplained. Owing to potential human involvement in the extinctions, archaeologists have been particularly concerned to understand the causes for faunal losses. Our current lack of understanding of the timing and the causes of the extinctions in North America may result from a deficiency in understanding the histories of each individual species of extinct animal on a local level. Detailed regional chronologies of …

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Stratigraphy, Sedimentology And Palynology Of The Neogene-Pleistocene(?) Rocks Around Akçaşehir- Tire-İzmir (Küçük Menderes Graben, Western Anatolia), Tahi̇r Emre, Meti̇n Tavlan, Mehmet Serkan Akki̇raz, İsmai̇l İşi̇ntek Jan 2011

Stratigraphy, Sedimentology And Palynology Of The Neogene-Pleistocene(?) Rocks Around Akçaşehir- Tire-İzmir (Küçük Menderes Graben, Western Anatolia), Tahi̇r Emre, Meti̇n Tavlan, Mehmet Serkan Akki̇raz, İsmai̇l İşi̇ntek

Turkish Journal of Earth Sciences

The basement rocks located in the central part of the southern edge of the Küçük Menderes Graben, around Akçaşehir-Tire are composed of marbles, schists, gneisses and metagabbros of the Ödemiş-Kiraz submassif of the Menderes Massif, and schists, marbles and meta-olistostromes of the Cycladic Complex. The basement is unconformably overlain by Neogene-Quaternary continental sediments. These continental basin fills are comprised of the Ayaklıkırı Formation, the Aydoğdu Formation and alluvium that unconformably overlies them. The Lower-Upper Miocene Ayaklıkırı Formation consists of lacustrine and fluvial deposits. The Plio-Pleistocene (?) Aydoğdu Formation is made up of alluvial fan deposits. Vast plains of alluvium cover …

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Impurity And Interdiffusion In The Magnesium-Aluminum System, Sarah Tiffany Brennan Jan 2011

Impurity And Interdiffusion In The Magnesium-Aluminum System, Sarah Tiffany Brennan

Electronic Theses and Dissertations

Magnesium alloys offer a base of lightweight engineering materials for electronic, military and transportation applications where weight reduction is crucial for higher efficiency. Understanding fundamental diffusion behavior in Mg alloys elicits better materials properties through the optimization of processing techniques and heat treatments, whose material responses are affected by diffusion. The main objective of this study is to provide a clear, comprehensive description of the diffusion behavior in the technically important magnesium-aluminum binary metallic system. In this study, diffusion in the Mg-Al system was observed through solid diffusion couples and thin film specimens in the temperature range of 673-523K. The …

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Lithology And Internal Structure Of The San Andreas Fault At Depth Based On Characterization Of Phase 3 Whole-Rock Core In The San Andreas Fault Observatory At Depth (Safod) Borehole, Kelly Keighley Bradbury, James P. Evans, J. S. Chester, F. M. Chester, D. L. Kirshner Jan 2011

Lithology And Internal Structure Of The San Andreas Fault At Depth Based On Characterization Of Phase 3 Whole-Rock Core In The San Andreas Fault Observatory At Depth (Safod) Borehole, Kelly Keighley Bradbury, James P. Evans, J. S. Chester, F. M. Chester, D. L. Kirshner

Geosciences Faculty Publications

We characterize the lithology and structure of the spot core obtained in 2007 during Phase 3 drilling of the San Andreas Fault Observatory at Depth (SAFOD) in order to determine the composition, structure, and deformation processes of the fault zone at 3 km depth where creep and microseismicity occur. A total of approximately 41 m of spot core was taken from three separate sections of the borehole; the core samples consist of fractured arkosic sandstones and shale west of the SAF zone (Pacific Plate) and sheared fine-grained sedimentary rocks, ultrafine black fault-related rocks, and phyllosilicate-rich fault gouge within the fault …

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