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Petrography, Stable Isotope Compositions, Microraman Spectroscopy, And Presolar Components Of Roberts Massif 04133: A Reduced Cv3 Carbonaceous Chrondrite, Jemma Davidson, Devin L. Schrader, Conel M. Alexander, Dante S. Lauretta, Henner Busemann, Ian A. Franchi, Richard C. Greenwood, Harold Connolly Jr., Kenneth J. Domanik, Alexander Verchovsky 2016 Selected Works

Petrography, Stable Isotope Compositions, Microraman Spectroscopy, And Presolar Components Of Roberts Massif 04133: A Reduced Cv3 Carbonaceous Chrondrite, Jemma Davidson, Devin L. Schrader, Conel M. Alexander, Dante S. Lauretta, Henner Busemann, Ian A. Franchi, Richard C. Greenwood, Harold Connolly Jr., Kenneth J. Domanik, Alexander Verchovsky

Harold Connolly

Here, we report the mineralogy, petrography, C-N-O-stable isotope compositions, degree of disorder of organic matter, and abundances of presolar components of the chondrite Roberts Massif (RBT) 04133 using a coordinated, multitechnique approach. The results of this study are inconsistent with its initial classification as a Renazzo-like carbonaceous chondrite, and strongly support RBT 04133 being a brecciated, reduced petrologic type >3.3 Vigarano-like carbonaceous (CV) chondrite. RBT 04133 shows no evidence for aqueous alteration. However, it is mildly thermally altered (up to approximately 440 °C); which is apparent in its whole-rock C and N isotopic compositions, the degree of disorder of ...


Towards Understanding The Dynamical Evolution Of Asteroid 25143 Itokawa: Constraints From Sample Analysis, Harold C. Connolly Jr., Dante S. Lauretta, Kevin J. Walsh, Shogo Tachibana, William F. Bottke Jr. 2016 Rowan University

Towards Understanding The Dynamical Evolution Of Asteroid 25143 Itokawa: Constraints From Sample Analysis, Harold C. Connolly Jr., Dante S. Lauretta, Kevin J. Walsh, Shogo Tachibana, William F. Bottke Jr.

Harold Connolly

The data from the analysis of samples returned by Hayabusa from asteroid 25143 Itokawa are used to constrain the preaccretion history, the geological activity that occurred after accretion, and the dynamical history of the asteroid from the main belt to near-Earth space. We synthesize existing data to pose hypotheses to be tested by dynamical modeling and the analyses of future samples returned by Hayabusa 2 and OSIRIS-REx. Specifically, we argue that the Yarkosky-O’Keefe-Radzievskii-Paddack (YORP) effect may be responsible for producing geologically high-energy environments on Itokawa and other asteroids that process regolith and essentially affect regolith gardening.


Characterization And Delineation Of Karst Geohazards Along Rm652 Using Electrical Resistivity Tomography, Culberson County, Texas, Adam F. Majzoub 2016 Stephen F Austin State University

Characterization And Delineation Of Karst Geohazards Along Rm652 Using Electrical Resistivity Tomography, Culberson County, Texas, Adam F. Majzoub

Electronic Theses and Dissertations

The Delaware Basin of West Texas and southeastern New Mexico is the major western subdivision of the Permian Basin and a northern extension of the Chihuahuan Desert. The major evaporite unit within the Delaware Basin is the Castile Formation, which consists of gypsum/anhydrite and is highly susceptible to dissolution and karsting. Manifestations of karst within the Castile outcrop are abundant and include sinkholes, subsidence features and caves, both epigene and hypogene in origin.

Land reconnaissance surveys conducted during the summer of 2015 documented abundant karst landforms in close proximity to a major thoroughfare, RM 652, in Culberson County, Texas ...


Modern Fair-Weather And Storm Sediment Transport Around Ship Island, Mississippi: Implications For Coastal Habitats And Restoration Efforts, Eve Rettew Eisemann 2016 University of Southern Mississippi

Modern Fair-Weather And Storm Sediment Transport Around Ship Island, Mississippi: Implications For Coastal Habitats And Restoration Efforts, Eve Rettew Eisemann

Master's Theses

The Mississippi – Alabama barrier island chain is experiencing accelerated sea level rise, decreased sediment supply, and frequent hurricane impacts. These three factors drive unprecedented rates of morphology change and ecosystem reduction. All islands in the chain have experienced land loss on the order of hectares per year since records began in the 1840s. In 1969, Hurricane Camille impacted as a Category 5, breaching Ship Island, and significantly reduced viable seagrass habitat. Hurricane Katrina impacted as a Category 3 in 2005, further widening Camille Cut. To better understand the sustainability of these important islands and the ecosystems they support, sediment transport ...


A Gis Analysis Of Waulsortian-Like Mounds In The Mississippian Of Kentucky And Tennessee, Philip Roberson 2016 Murray State University

A Gis Analysis Of Waulsortian-Like Mounds In The Mississippian Of Kentucky And Tennessee, Philip Roberson

Scholars Week

Following a mass extinction nearly 365 million years ago, bryozoans and crinoids replaced corals and stromatoporoids as the dominant framework organisms in reefs and, during the very earliest part of the Carboniferous period, they built reef-like structures that are known from Europe, North America and Africa. They are characterized by large size, a matrix of carbonate mud, and their major framework organisms.

Waulsortian-like mounds occur in geographically isolated patches in outcrop and in the subsurface of central Tennessee and Kentucky where they are associated with hydrocarbon production. These mounds have the same characteristic organisms as the European mounds and do ...


Tracking Earthquake Frequency And Intensity In Oklahoma, Kristin Lorenzini 2016 Murray State University

Tracking Earthquake Frequency And Intensity In Oklahoma, Kristin Lorenzini

Scholars Week

The purpose of this project is to show the dramatic increase of earthquakes that have occurred in Oklahoma over the past eight years that have been correlated to fracking in the area. Starting in 2009, before fracking took place in Oklahoma, there were a total of 33 earthquakes throughout the whole year. In 2010, when fracking began in Oklahoma, the number of earthquakes spiked to over 100 in one year. The number of earthquakes grew over the years and in 2015 there were over 2,000. Data from 2016 were also used but only through the month of September, the ...


Landform Mapping Of The Clarks River Alluvial System Using Lidar Dems, Benedict W. Ferguson 2016 Murray State University

Landform Mapping Of The Clarks River Alluvial System Using Lidar Dems, Benedict W. Ferguson

Scholars Week

The Clarks River is located in western Kentucky near the city of Benton. It travels through and weathers lacustrine or lake deposits as well as fluvial or river deposits. These deposits are also overlain by loess deposited from the last glacial maximum. Historically, people have taken advantage of these rich deposits for agriculture which has led to increased settlement. With increased settlement, the river has experienced alteration. The west fork of the Clarks River has been channelized while the east fork of the Clarks River has managed to remain un-channelized and has since been allowed to run relatively freely.

Detailed ...


Change Detection Of Mount Nyiragongo Post Eruption, Molly E. Karnes 2016 Murray State University

Change Detection Of Mount Nyiragongo Post Eruption, Molly E. Karnes

Scholars Week

Because of the dangerous nature of volcanic eruptions, it makes them very difficult to study, however this makes them even more important for us to study because of how much destruction they can cause in such a short amount of time. We need to study all parts of an eruption to gain more insight into the specifics of how a volcano works. Having a better understanding of how large of an area is effected by an eruption will allow governments to decide on evacuation procedures. The goal of my project is to answer a very simple question, “How can we ...


Unblocking Temperatures Of Viscous Remanent Magnetism In Displaced Granitic Boulders, Icicle Creek Glacial Moraines (Washington, Usa), Juliet G. Crider, Danika M. Globokar, Russ F. Burmester, Bernard A. Housen 2016 Western Washington University

Unblocking Temperatures Of Viscous Remanent Magnetism In Displaced Granitic Boulders, Icicle Creek Glacial Moraines (Washington, Usa), Juliet G. Crider, Danika M. Globokar, Russ F. Burmester, Bernard A. Housen

Bernard A. Housen

Viscous remanent magnetization (VRM) may partially overprint original magnetization in rocks displaced by geomorphic events. An established theoretical relationship between the time and temperature of acquisition of VRM and the time and temperature of demagnetization suggests that laboratory demagnetization (unblocking) of VRM can be used to estimate the displacement age of rocks. We test this hypothesis at four nested glacial moraines in the Icicle Creek drainage of central Washington, the ages of which were previously determined by cosmogenic surface exposure dating. The moraines are composed primarily of granodiorite boulders, and magnetic remanence is carried dominantly by magnetite. Both the maximum ...


Rock Magnetism Of Hematitic "Bombs" From The Araguainha Impact Structure, Brazil, Luigi Jovane, Elder Yokoyama, Takele Seda, Russell F. Burmester, Ricardo I.F. Trindade, Bernard A. Housen 2016 Western Washington University

Rock Magnetism Of Hematitic "Bombs" From The Araguainha Impact Structure, Brazil, Luigi Jovane, Elder Yokoyama, Takele Seda, Russell F. Burmester, Ricardo I.F. Trindade, Bernard A. Housen

Russ R. Burmester

Hematite impact “bombs” are one of the most striking (and enigmatic) features of the large Araguainha impact structure in central Brazil. They have both porous or massive textures, elongated shapes from 5 to 50 cm in diameter, and botryoidal textures that suggest hydrothermal origin. Some authors have considered these objects as a possible analog of hematite nodules found in Mars, and consequently related to a hydrothermal system. Here we report rock magnetic measurements, X-ray diffraction and Mössbauer spectra for both massive and porous samples for a detailed description of the hematite. Room temperature magnetic measurements, including hysteresis loops, back-field and ...


Unblocking Temperatures Of Viscous Remanent Magnetism In Displaced Granitic Boulders, Icicle Creek Glacial Moraines (Washington, Usa), Juliet G. Crider, Danika M. Globokar, Russ F. Burmester, Bernard A. Housen 2016 Western Washington University

Unblocking Temperatures Of Viscous Remanent Magnetism In Displaced Granitic Boulders, Icicle Creek Glacial Moraines (Washington, Usa), Juliet G. Crider, Danika M. Globokar, Russ F. Burmester, Bernard A. Housen

Russ R. Burmester

Viscous remanent magnetization (VRM) may partially overprint original magnetization in rocks displaced by geomorphic events. An established theoretical relationship between the time and temperature of acquisition of VRM and the time and temperature of demagnetization suggests that laboratory demagnetization (unblocking) of VRM can be used to estimate the displacement age of rocks. We test this hypothesis at four nested glacial moraines in the Icicle Creek drainage of central Washington, the ages of which were previously determined by cosmogenic surface exposure dating. The moraines are composed primarily of granodiorite boulders, and magnetic remanence is carried dominantly by magnetite. Both the maximum ...


A Study Of The Christian Public's Engagement With The New Geology Of The 19th Century And Its Implications For The Succeeding Centuries, Cornelis Bootsman, Kevin C. de Berg, Lynden Rogers 2016 Auckland Adventist High School

A Study Of The Christian Public's Engagement With The New Geology Of The 19th Century And Its Implications For The Succeeding Centuries, Cornelis Bootsman, Kevin C. De Berg, Lynden Rogers

Lynden Rogers

While Christian communities had no problem engaging positively with the sciences of astronomy, physics and chemistry, they had difficulty engaging with the emerging geology and biology of the 19th century. The ancient earth and evolutionary models of geology and biology respectively were seen as a direct attack on the biblical Genesis model of a young earth and a creation that took place over the period of a week. Some Christian apologists used Baconianism and the Scottish Common Sense philosophy to suggest that geology was not a real science. Geology was characterised as consisting of wild speculation, hypotheses and theories ...


A Study Of The Christian Public's Engagement With The New Geology Of The 19th Century And Its Implications For The Succeeding Centuries, Cornelis Bootsman, Kevin C. de Berg, Lynden Rogers 2016 Auckland Adventist High School

A Study Of The Christian Public's Engagement With The New Geology Of The 19th Century And Its Implications For The Succeeding Centuries, Cornelis Bootsman, Kevin C. De Berg, Lynden Rogers

Kevin de Berg

While Christian communities had no problem engaging positively with the sciences of astronomy, physics and chemistry, they had difficulty engaging with the emerging geology and biology of the 19th century. The ancient earth and evolutionary models of geology and biology respectively were seen as a direct attack on the biblical Genesis model of a young earth and a creation that took place over the period of a week. Some Christian apologists used Baconianism and the Scottish Common Sense philosophy to suggest that geology was not a real science. Geology was characterised as consisting of wild speculation, hypotheses and theories ...


A Long History Of Linkages And Synergy: Western Kentucky University And The Mammoth Cave System, Deana Groves, Chris Groves, Weldon Hawkins 2016 Western Kentucky University

A Long History Of Linkages And Synergy: Western Kentucky University And The Mammoth Cave System, Deana Groves, Chris Groves, Weldon Hawkins

Deana Groves

No abstract provided.


Book Review, Peter C. Christensen 2016 University of New Hampshire

Book Review, Peter C. Christensen

RISK: Health, Safety & Environment

Review of: MARY R. ENGLISH, SITING LOW-LEVEL RADIOACTIVE WASTE DISPOSAL FACILITIES: THE PUBLIC POLICY DILEMMA. (Quorum Books 1992) [278 pp.], Appendices, index, introduction, references. LC-91-42774; ISBN 0-89930-560-1. [$49.95 cloth. One Madison Avenue, New York NY 10010.]


Risk Estimation And Expert Judgment: The Case Of Yucca Mountain, Kristin Shrader-Frechette 2016 University of New Hampshire

Risk Estimation And Expert Judgment: The Case Of Yucca Mountain, Kristin Shrader-Frechette

RISK: Health, Safety & Environment

Professor Shrader-Frechette discusses factors responsible for acute disagreement between the federal government and Nevada citizens over potential Risks at Yucca Mountain and focuses on the use of expert judgment, concluding that some of them appear to exemplify "bad science." That aside, she argues that 1,000 year predictions cannot be made from current knowledge of geology or, e.g., institutional behavior and concludes that permanent disposal of radioactive waste is currently impossible.


Caves As Paleo-Water Table Indicators In The Unconfined Upper Floridan Aquifer, Jason Gulley, Lee J. Florea 2016 Ball State University

Caves As Paleo-Water Table Indicators In The Unconfined Upper Floridan Aquifer, Jason Gulley, Lee J. Florea

Lee J Florea, PhD, P.G.

Caves and associated dissolution features provide a valuable resource and geological record for paleo-water table elevations in the Upper Floridan aquifer. The water table has migrated up and down in response to sea level fluctuations, and laterally extensive regions of enhanced porosity, including caves, have formed during periods of paleo-water table stability. Because water table elevations controlled cave formation, cave development was more widespread during periods of low sea level, when unconfined aquifer conditions were more widespread and more of the Florida platform was exposed. By contrast, during periods of high sea level, less of the platform was exposed and ...


Guidance Index For Shallow Landslide Hazard Analysis, Cheila Cullen 2016 The Graduate Center, City University of New York

Guidance Index For Shallow Landslide Hazard Analysis, Cheila Cullen

All Graduate Works by Year: Dissertations, Theses, and Capstone Projects

Rainfall-induced landslides are one of the most frequent hazards on slanted terrains. They lead to considerable economic losses and fatalities worldwide. Intense storms with high-intensity and long-duration rainfall have high potential to trigger rapidly moving soil masses due to changes in pore water pressure and seepage forces. Nevertheless, regardless of the intensity-duration of the rainfall, shallow landslides are influenced by antecedent soil moisture conditions. To the present day, no system exists that dynamically interrelates these two factors.

This work establishes a relationship between antecedent soil moisture and rainfall expressed in the form of a Shallow Landslide Index (SLI) at 1km ...


The Application Of Geophysical Inversion Techniques To The Nechalacho Rare Earth Element Deposit, Nt, Derek W. Kouhi 2016 The University of Western Ontario

The Application Of Geophysical Inversion Techniques To The Nechalacho Rare Earth Element Deposit, Nt, Derek W. Kouhi

Electronic Thesis and Dissertation Repository

The Nechalacho deposit is a world-class rare earth element deposit located in the Thor Lake region approximately 100 kilometers southwest of Yellowknife, NT, Canada. Located within the Blatchford Lake Intrusion Complex, this deposit has the potential to be a large-scale economic asset due to its relatively shallow and sub-horizontal geometry. In this study, geophysical inversion techniques are used to model subsurface magnetic susceptibility and density in order to delineate the deposit. Isolated and joint inversion of both magnetic and gravity data provides similar models. Each inversion procedure delineates a shallow, sub-horizontal layer of high susceptibility and density in approximately the ...


Utilization Of Lidar Intensity Data And Passive Visible Imagery For Geological Mapping Of Planetary Surfaces, Taylor M. Haid 2016 The University of Western Ontario

Utilization Of Lidar Intensity Data And Passive Visible Imagery For Geological Mapping Of Planetary Surfaces, Taylor M. Haid

Electronic Thesis and Dissertation Repository

While lidar has been historically used for generating digital terrain maps and as a navigation tool, recent research demonstrates that lidar has many potential scientific applications, including high resolution analysis of geological outcrops. Case studies were completed at the Tunnunik impact structure, Victoria Island, Arctic Canada, and the Nickel Rim South mine, Sudbury, Canada, to assess the fidelity of characterizing and differentiating mineralogical and lithological units remotely by integrating passive visible imagery with lidar intensity data. Unsupervised classification via k-means clustering was performed on the fused datasets, with results indicating that lithologies can indeed be successfully differentiated with minor a ...


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