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Petrofacies And Depositional Systems Of The Bakken Formation In The Williston Basin, North Dakota, Anne Steptoe
Petrofacies And Depositional Systems Of The Bakken Formation In The Williston Basin, North Dakota, Anne Steptoe
Graduate Theses, Dissertations, and Problem Reports (ETD)
Late Devonian and Early Mississippian Bakken Formation in the Williston basin of North Dakota is a large emerging unconventional oil play that taps into reserves previously thought to be uneconomical to produce. The hydrocarbon source rocks and unconventional oil reservoir are widespread across the intracratonic basin with an estimated 3.7 billion barrels of undiscovered, recoverable oil, and has significant economic potential in portions of North Dakota, South Dakota, Montana, Saskatchewan, and Manitoba. Although the Bakken interval is the target of numerous horizontal wells throughout the basin, several uncertainties remain including the environment and distribution of depositional facies, especially in the …
Use Of 3d Seismic Azimuthal Iso-Frequency Volumes For The Detection And Characterization Of High Porosity/Permeability Zones In Carbonate Reservoirs, Brian E. Toelle
Use Of 3d Seismic Azimuthal Iso-Frequency Volumes For The Detection And Characterization Of High Porosity/Permeability Zones In Carbonate Reservoirs, Brian E. Toelle
Graduate Theses, Dissertations, and Problem Reports (ETD)
Among the most important properties controlling the production from conventional oil and gas reservoirs is the distribution of porosity and permeability within the producing geologic formation. The geometry of the pore space within these reservoirs, and the permeability associated with this pore space geometry, impacts not only where production can occur and at what flow rates but can also have significant influence on many other rock properties. Zones of high matrix porosity can result in an isotropic response for certain reservoir properties whereas aligned porosity/permeability, such as open, natural fracture trends, have been shown to result in reservoirs being anisotropic …
Forest Fragmentation Mapping, Change Detection, And Gas Well Site Identification In Remotely Sensed Imagery: The Role Of Spatial Resolution, Benjamin A. Baker
Forest Fragmentation Mapping, Change Detection, And Gas Well Site Identification In Remotely Sensed Imagery: The Role Of Spatial Resolution, Benjamin A. Baker
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research focuses on identifying optimal data and methods for detecting and quantifying land cover/land use change associated with natural gas drilling in Appalachia. Airborne and satellite remote sensing provides a tool for examining land cover changes. Although change detection has been used in many applications related to natural and anthropogenic land cover change, little research has investigated the spatial pattern of land cover change associated with the ongoing expansion of natural gas drilling, particularly within the Marcellus Shale formation found across much of the northern Appalachian Region. Mapping land cover/land use change facilitates research of other relevant topics that …
Professional Development School Support Of The Elementary Globe Curriculum A Facilitated Adaptation Of Inquiry Science, Vance D. High
Professional Development School Support Of The Elementary Globe Curriculum A Facilitated Adaptation Of Inquiry Science, Vance D. High
Graduate Theses, Dissertations, and Problem Reports (ETD)
This qualitative study focused on identifying barriers and remedies to those barriers found when teaching elementary school science. The Elementary GLOBE Program (2006) was the curriculum selected when doing the 18 month study. The researcher asked what made Elementary GLOBE (EG) easy and/or difficult to use. The researcher also wished to ascertain what impact did the adoption of EG have on the delivery of science instruction in the K-4 grade classrooms participating in this study. Two professional developments schools (PDS), located in a Mid Atlantic state were the sites for the study. Both schools are in an urban setting and …
Agenda Building In Health Communication: How The Cdc Is Using Traditional And Social Media Tactics In Public Relations, Kristen Wishon
Agenda Building In Health Communication: How The Cdc Is Using Traditional And Social Media Tactics In Public Relations, Kristen Wishon
Graduate Theses, Dissertations, and Problem Reports (ETD)
Emerging Internet technologies, such as social networking websites and blogs, are influencing how public relations practitioners choose to disseminate health content to their constituents. Using the agenda-building theory as a guide, this exploratory study used both qualitative and quantitative methods to examine the Centers for Disease Control and Prevention's (CDC) social media and traditional media health messages, as well as to explore if these messages had any agenda-building effect on mainstream media placement (i.e., the Associated Press).;Personal interviews with CDC health communication specialists and three content analyses were conducted. Two significant correlations were found between the health topics in the …
Sustainability Of Coalition Of Essential School's Professional Development As Perceived By Teachers, Kristine E. Mcgee
Sustainability Of Coalition Of Essential School's Professional Development As Perceived By Teachers, Kristine E. Mcgee
Graduate Theses, Dissertations, and Problem Reports (ETD)
Research indicates a strong need to incorporate professional development into a well-orchestrated reform effort. The Coalition of Essential Schools (CES) reform model for this failing school was selected by the county administration and a few select teachers as East Elementary School. The sustainability of the professional development provided by CES is the focus of this study.;This study concluded that East Elementary School was perceived by teachers as having sustainable professional-development components. Major findings included the following: (a) the teachers played a key role in sustaining professional development at this school, (b) professional development changed how teachers communicated with students at …
Natural Barrier Assessment And Modeling For Fish Communities In Delaware Water Gap National Recreation Area, Ross G. Andrew
Natural Barrier Assessment And Modeling For Fish Communities In Delaware Water Gap National Recreation Area, Ross G. Andrew
Graduate Theses, Dissertations, and Problem Reports (ETD)
Natural barriers may play an important role in structure and composition of stream fish habitat. Determining the effects of natural barriers on fish communities is important for understanding ecological processes that may occur throughout barrier-affected habitats. Additionally, modeling the likelihood of natural barrier occurrence using spatial data can reduce survey effort in the field and make management of fisheries in barrier-affected systems more efficient. I surveyed 446 natural barriers within the Delaware Water Gap National Recreation Area using a standardized field protocol to assess passability for fishes. I measured natural barriers individually based upon individual morphology and developed a scoring …
The Failure Of The Surveillance State: Observation, Narrative And Identity In American Literature And Culture Since The Cold War, Jeremy C. Justus
The Failure Of The Surveillance State: Observation, Narrative And Identity In American Literature And Culture Since The Cold War, Jeremy C. Justus
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation examines an aporia in Michel Foucault's analysis of ideological panopticism. Foucault would likely suggest that the contemporary widespread use and acceptance of second-generation surveillance technologies exemplifies the discursive circulation of panoptic ideology. To the contrary, there is a great deal of evidence that suggests that such technology can be used for, to borrow Steve Mann's phrase, sousveillance (or, literally, "to watch from below"). By drawing from Niklas Luhmann's and Gregory Bateson's examinations of the inherent "blind spots" of observation systems (both literal and metaphorical), this dissertation suggests that sousveillance posits a challenge to the theoretically "neat" (according to …
Impact Of Stimulation Treatments On Production Performance Of Horizontal Wells In The Marcellus Shale, Kimberly L. Larch
Impact Of Stimulation Treatments On Production Performance Of Horizontal Wells In The Marcellus Shale, Kimberly L. Larch
Graduate Theses, Dissertations, and Problem Reports (ETD)
The interest in exploitation of ultra-low permeability formations, such as the Marcellus Shale, has increased in the recent years. Shale formations require massive stimulation treatments to achieve economic production. The recent advances in horizontal drilling and multistage hydraulic fracturing have proved successful in achieving commercial production. However, the parameters that directly affect lifetime production of the wells have not been well established.;The primary objective of this study is to examine the effects of basic stimulation parameters used in hydraulic fracturing of Marcellus Shale wells on production performance. Historical production data and stimulation treatment information have been collected and analyzed for …
Eastern Promises: Poland's Role As A Regional Actor In The European Union's Eastern Policy-- The Example Of Belarus, Max David Reinke
Eastern Promises: Poland's Role As A Regional Actor In The European Union's Eastern Policy-- The Example Of Belarus, Max David Reinke
Graduate Theses, Dissertations, and Problem Reports (ETD)
The present thesis will analyze Poland's current and potential role as an effective regional actor in mediating the European Union's (EU) relations with its easternmost neighbors. In order to most accurately assess this, this thesis will examine Poland's relationship with Belarus, specifically democratization efforts and forging a strong, resolute association with the European Union. Being a successful post-communist transition state and recent EU Member State, Poland has for some time seen itself to be the most-qualified country to bridge Eastern and Western Europe. Belarus in particular is a country of concern for the Polish government because it is a bordering …
Three-Dimensional Seismic Attribute-Assisted Fracture Detection In The Middle Devonian Marcellus Shale, Greene And Washington Counties, Pa, Central Appalachian Basin., Albert S. Babarsky
Three-Dimensional Seismic Attribute-Assisted Fracture Detection In The Middle Devonian Marcellus Shale, Greene And Washington Counties, Pa, Central Appalachian Basin., Albert S. Babarsky
Graduate Theses, Dissertations, and Problem Reports (ETD)
The analyses of conventional structural attributes (first derivative, ant-tracking, curvature, and variance) indicate very complex fracture systems within a Middle Devonian unconventional gas reservoir of the Central Appalachian Basin. In this study, the investigation of such complexity and the implications of fault networks to the exploration for and production of hydrocarbons are outlined. Spectral decomposition (iso-frequency) amplitude analysis was utilized in order to define spectral amplitude response to the fracture facies. The results are useful to characterize fractured reservoir properties such as fault networks and fracture intensity. The calibration of spectral decomposition attributes using previous petrophysical studies or using structure …
Ambient Geochemical And Isotopic Variations In Groundwaters Across An Area Of Accelerating Shale Gas Development, Michon L. Mulder
Ambient Geochemical And Isotopic Variations In Groundwaters Across An Area Of Accelerating Shale Gas Development, Michon L. Mulder
Graduate Theses, Dissertations, and Problem Reports (ETD)
One of the main challenges associated with Marcellus Formation shale gas development is to ensure proper management and disposal of flowback water produced as a result of hydraulic fracturing of gas wells. The flowback water consists of a mixture of returned frac'ing fluids and highly saline formation brines. As a result, improper management or disposal of this flowback can potentially contaminate the fresh surface waters and groundwaters of the area. To better assess any detrimental effect on water quality, there is need to understand the natural geochemical variations prior to the rapid expansion of gas drilling in the area.;This study …
Patient Preferences For Benefits And Risks Associated With Disease Modifying Drugs In Multiple Sclerosis, Abhijeet J. Bhanegaonkar
Patient Preferences For Benefits And Risks Associated With Disease Modifying Drugs In Multiple Sclerosis, Abhijeet J. Bhanegaonkar
Graduate Theses, Dissertations, and Problem Reports (ETD)
Multiple sclerosis (MS) is a chronic inflammatory demyelinating neurological disorder with no known cure. Disease modifying drugs (DMDs) used in the treatment of MS reduce the frequency relapses and delay the progression of the disease. Although DMD therapy is the mainstay of treatment of MS, it is associated with variety of side effects and severe adverse events. A majority of currently available DMDs are injectable, except one which is available in the pill form. Therapeutic decisions in MS are challenging due to the inconvenience of administration, frequency of administration, longer duration of therapy, side effects, and risk of adverse events …
Potential Inhibitors And Sources Of Error In The Measurement Of Travertine Precipitation Rates In A Karst Stream Influenced By Thermal Mineral Waters, Johnathan E. Moore
Potential Inhibitors And Sources Of Error In The Measurement Of Travertine Precipitation Rates In A Karst Stream Influenced By Thermal Mineral Waters, Johnathan E. Moore
Graduate Theses, Dissertations, and Problem Reports (ETD)
Precipitation rates for travertine have been studied in many natural settings and compared to theoretical calcite (CaCO3) precipitation rates; in most studies, the emphasis is placed on the degassing of CO 2 as the primary controlling mechanism. Little research has been done in natural settings to evaluate precipitate composition, rates of precipitation, and the role of potential inhibitors of calcite growth. This study addresses these questions in a Sweet Springs Creek, West Virginia-Virginia: a karst stream fed partly by thermal mineral waters with high CO2. For this study, travertine plates were deployed to measure the accretion of precipitates in the …
In Search Of A Dream America: Place-Connectedness In East European Immigrant Life Writing, Irina V. Rodimtseva
In Search Of A Dream America: Place-Connectedness In East European Immigrant Life Writing, Irina V. Rodimtseva
Graduate Theses, Dissertations, and Problem Reports (ETD)
Theorists of place acknowledge human need for attachment to place, but this bond is often stated as a given, without an explication of its origin or attributes. Implementing the concept of place-connectedness formulated by Lawrence Buell, I analyze the process of bonding with new places described in immigrant life writing, focusing on twentieth-century texts by authors from Russia, the Soviet Union, and Communist bloc countries. Examining the sources through which American imagery was available to East Europeans during the 1900s, I confirm a link between the concepts of the American Dream and of place-connectedness and contend that for immigrants, establishing …
Tracing Water And Carbon Sources In Complex Geochemical Settings Of The Appalachians: An Isotopic Perspective, Andrea L. Sack
Tracing Water And Carbon Sources In Complex Geochemical Settings Of The Appalachians: An Isotopic Perspective, Andrea L. Sack
Graduate Theses, Dissertations, and Problem Reports (ETD)
Understanding sources of water and carbon are important for tracking recharge sources as well as assessing any changes in water quality associated with shale gas drilling and/or coal mining in the Appalachians. Natural stable isotopes have become an increasingly important tool for determining sources and cycling of water, carbon, nutrients and other trace elements. This is plausible because variations in water-rock interactions, recharge sources, recharge pathways, and residence time can impart unique isotopic fingerprints to different water sources.;The main objective of this study was to use stable isotopes of water (delta18OH2O and delta2H H2O), DIC (delta13CDIC) and SO4 (delta34SSO4 and …
Coca Or Death! The Political Ecology Of Cocalero Resistance A Comparative Analysis Of The Coca Farmer Social Movement In Andean Peru., Timothy Scott Pruett
Coca Or Death! The Political Ecology Of Cocalero Resistance A Comparative Analysis Of The Coca Farmer Social Movement In Andean Peru., Timothy Scott Pruett
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research focuses on the resistance of coca farmers to government policies regarding coca production in Peru. Since the 1980s, the Peruvian government has criminalized the actions of numerous agricultural communities and conducted eradication campaigns that destroyed hundreds of thousands of hectares of Peruvian coca. Although eradication is intended to reduce the volume of coca leaves destined for black markets (cocaine production), it has had the unintended consequence of mobilizing peasant coca producing populations against such policies. Mobilization is reflected in protests, strikes, marches, and occasionally violent confrontations. Some coca farmers (cocaleros) are following a cultural heritage of producing a …
Black Shale Lithofacies Prediction And Distribution Pattern Analysis Of Middle Devonian Marcellus Shale In The Appalachian Basin, Northeastern U.S.A., Guochang Wang
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Marcellus Shale, marine organic-rich mudrock deposited during Middle Devonian in the Appalachian basin, is considered the largest unconventional shale-gas resource in United State. Although homogeneous in the appearance, the mudstone shows heterogeneity in mineral composition, organic matter richness, gas content, and fracture density. Two critical factors for unconventional mudstone reservoirs are units amenable to hydraulic fracture stimulation and rich of organic matter. The effectiveness of hydraulic fracture stimulation is influenced by rock geomechanical properties, which are related to rock mineralogy. The natural gas content in mudrock reservoirs has a strong relationship with organic matter, which is measured by total …
Scalar Imperialism, Janice M. Hardin
Scalar Imperialism, Janice M. Hardin
Graduate Theses, Dissertations, and Problem Reports (ETD)
The dual research goals of this dissertation are to first develop the geographic concept 'scalar imperialism' and use scalar imperialism to re-examine the expansion and continued superiority of Western capitalism in four systemic cycles of accumulation. Scalar imperialism is a concept that melds theories on the social production of scale with the dialectical relations between capitalism, imperialism, and the state. One significant aim of this research study is to bring imperialism back into the critical discussion on the social production of space, scale, and social relations under a globalized capitalist system. This research study adopts a long historical perspective and …
Mesozoic Tectonic History And Geochronology Of The Kular Dome, Russia And Bendeleben Mountains, Seward Peninsula, Alaska, Daniel B. Harris
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, …
The Historical Industrial Development, Regional Economic Analysis, And Household Livelihood Strategies Of A Rural Pennsylvania Community: A Case Study, Amanda. L. Krugh
The Historical Industrial Development, Regional Economic Analysis, And Household Livelihood Strategies Of A Rural Pennsylvania Community: A Case Study, Amanda. L. Krugh
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation research focuses on the case study area of Mount Union, Huntingdon County, Pennsylvania. This three part dissertation research project includes analysis of the historical industrial development, current economy, and household livelihood strategies of this rural community. The regulation approach is utilized in this paper to analyze the historic economic development associated with manufacturing, specifically brick manufacturing, in the case study area. Quantitative techniques are used to indentify the economic structure of a region and used to examine the strengths and weaknesses of the Huntingdon County economy. Qualitative methods are utlized to examine what economic and social adjustments and …
A Legislative Review Of U.S. Aquaculture: A State Analysis Relating To West Virginia, Ryan M. Benninger
A Legislative Review Of U.S. Aquaculture: A State Analysis Relating To West Virginia, Ryan M. Benninger
Graduate Theses, Dissertations, and Problem Reports (ETD)
This case study was designed and presented to allow a "reader-friendly" environment for aquaculture industry inquiry, specifically to pertain to West Virginia's recent surge in industry development. The sample for this thesis consisted of aquaculture producing states located within the continental U.S. The research design was qualitative descriptive that evaluated the legislative environments for each state aquaculture industry to ultimately pass recommendations for West Virginia. Of the states surveyed, it was found that 26 states enacted development acts for respective industries; 19 states were found to further develop with strategic plans. The greatest constraint discovered during this project was a …
Gis Assisted Problem Analysis Of Trail Erosion In Monongahela National Forest, Steven J. Storck
Gis Assisted Problem Analysis Of Trail Erosion In Monongahela National Forest, Steven J. Storck
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research investigates the frequency and patterns of trail erosion on purposefully selected natural surface trails in Monongahela National Forest. Trail erosion is considered a non-self-limiting process which degrades trail beds making them unattractive, difficult to travel on, and has the potential to impact local streams with the introduction of silt. Recreation ecology research delineates factors which influence the rate of erosion on a trail into three broad categories: recreational use, environmental conditions, and managerial actions. This study tests the relationship of variables from each of these categories to the local patterns of erosion. Three sampling strategies are used to …
Exploration Of Stream Habitat Spatial Modeling; Using Geographically Weighted Regression, Ordinary Least Squares Regression, And Natural Neighbor Interpolation To Model Depth, Flow, And Benthic Substrate In Streams, Kenneth R. Sheehan
Graduate Theses, Dissertations, and Problem Reports (ETD)
Assessment and modeling of stream habitat are integral to understanding streams and the biota within them. In the past several decades, assessment sophistication of ecologic systems increased due to analysis power afforded by gains in computing capability. Spatial data analysis methodology grew alongside computing power and incorporated spatial qualities of ecological data, thereby providing new insights. New methods like geographically weighted regression (GWR) and more established methods like interpolation are now being used in ecological studies to guide assessments and management decisions. However, their accuracy and utility for analysis of stream habitat data have not been fully explored. To clarify …
Land Use Pressure And Climate Impacts On Fire Regimes And Forest Regeneration In The Upper Tuul River Watershed, Mongolia, Thomas M. Saladyga
Land Use Pressure And Climate Impacts On Fire Regimes And Forest Regeneration In The Upper Tuul River Watershed, Mongolia, Thomas M. Saladyga
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation is composed of three chapters addressing the broad issues of land use, climate variability, and wildfire in central Mongolia. The first chapter describes a GIS model developed to map human impacts in the Upper Tuul River watershed. Forest establishment data were used to validate the application of the model with results indicating a high level of correspondence with a field assessment of human disturbance. Chapter two is a tree-ring based reconstruction of Palmer Drought Severity Index (PDSI) for the central Khan Khentii Mountains from 1675-2000. Changes in moisture availability were more frequent during the 20th century than any …
Sequence Stratigraphy, Distribution And Preservation Of Organic Carbon, And Reservoir Properties Of The Middle Devonian Marcellus Shale, Of The Central Appalachian Basin; Northern West Virginia And Southwestern Pennsylvania, Roy L. Sexton Iv
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Middle Devonian Marcellus Shale of the central Appalachian basin is an unconventional resource play with approximate aerial extent of 34,000,000 acres (137,000 km²), and an estimated 84 trillion cubic feet (2.4 trillion m³) of recoverable natural gas and three billion barrels of recoverable natural gas liquids. Advances in drilling and completion technology have enabled economic production of hydrocarbons from the Marcellus. Despite increased exploration and production of the formation, uncertainties remain regarding controls on spatial and stratigraphic variations in reservoir properties such as total organic carbon (TOC), mineralogic composition, and authigenic components. Additionally, there is a lack of understanding …
Hydroclimatic Variability In North-Central Mongolia As Inferred From Tree Rings, Caroline Leland
Hydroclimatic Variability In North-Central Mongolia As Inferred From Tree Rings, Caroline Leland
Graduate Theses, Dissertations, and Problem Reports (ETD)
The influence of increasing temperatures on hydrologic regimes across Mongolia is difficult to evaluate from a spatial perspective, particularly at fine resolutions. Therefore, networks of tree-ring chronologies are a valuable means of assessing regional and local variability in hydroclimate while placing recent moisture trends in a historical context. Tree-ring data are particularly useful in Mongolia, where instrumental records are spatially and temporally limited. Here, I present two chapters that are essentially related and complement one another. The first chapter seeks to identify tree-growth anomaly regions (i.e. inferred hydroclimatic regions) across north-central Mongolia based on a network of 21 tree-ring chronologies. …
Sequence Stratigraphy, Depositional Environments, And Regional Mapping Of The Late Devonian Interval, Upper Three Forks Formation, Sanish Member, And Lower Bakken Shale, U.S. Portion Of The Williston Basin, Steven A. Sesack
Graduate Theses, Dissertations, and Problem Reports (ETD)
Cores of the Late Devonian upper Three Forks, Sanish, and lower Bakken units from eight wells were examined and described at the North Dakota core depository. Core descriptions, wireline log correlation and mapping, and X-ray diffraction (XRD) data were integrated to recognize seven facies: The Three Forks D and the (600-900API) lower Bakken Shale, four facies belonging to the Sanish, and a basal siltstone facies assigned to the Lower Bakken. Facies identified were then grouped into separate systems tracts based on the identification of several significant sequence stratigraphic surfaces.;The four facies identified in the Sanish include: Facies A, a dolomitic …
Development Of Soil Lead And Tree-Ring Methods For Characterizing Atmospheric Deposition Gradients And Subsequent Tree Growth Responses, Bradley P. Breslow
Development Of Soil Lead And Tree-Ring Methods For Characterizing Atmospheric Deposition Gradients And Subsequent Tree Growth Responses, Bradley P. Breslow
Graduate Theses, Dissertations, and Problem Reports (ETD)
Atmospheric deposition of pollutants and nutrients can have a range of effects on aquatic and terrestrial ecosystems. Despite its ecological importance, it remains a challenge to model patterns of deposition across complex terrain and also to assess how forest ecosystems are reacting to chronic inputs of atmospheric deposition. I measured the lead (Pb) content of forest soils adjacent to atmospheric deposition monitoring stations throughout the central Appalachian Mountains to examine how well patterns of soil Pb relate to regional patterns of inorganic nitrogen (N) deposition. While I found no significant relationship between organic soil Pb content and N deposition, I …
Systematics, Phylogenetics, And Biogeography Of Early Mississippian Camerate Crinoids Of The Nunn Member, Lake Valley Formation, In South-Central New Mexico, Elizabeth C. Rhenberg
Systematics, Phylogenetics, And Biogeography Of Early Mississippian Camerate Crinoids Of The Nunn Member, Lake Valley Formation, In South-Central New Mexico, Elizabeth C. Rhenberg
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Lake Valley Formation has long been known for the crinoids that are abundant in the formation. The crinoids were noted in the first descriptions of the formations in the late 1800's, but there has never been a comprehensive study done on the crinoids and as a result there is no complete list of crinoids that existed in south-central New Mexico during the Early Mississippian. Although all subclasses of crinoids are found in the Nunn Member, it is the camerate crinoids that dominate the fauna and will be the focus of this study. Most of the specimens studied came from …