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Holdrege: Nebraska's State Soil, University of Nebraska - Lincoln 2017 University of Nebraska - Lincoln

Holdrege: Nebraska's State Soil, University Of Nebraska - Lincoln

Conservation and Survey Division

No abstract provided.


Holdrege Nebraska State Soil, Nebraska Society of Professional Soil Scientists 2017 Nebraska Society of Professional Soil Scientists

Holdrege Nebraska State Soil, Nebraska Society Of Professional Soil Scientists

Conservation and Survey Division

No abstract provided.


Groundwater Levels In Nebraska 1984, Michael J. Ellis, Darryll T. Pederson 2017 U.S. Geological Survey

Groundwater Levels In Nebraska 1984, Michael J. Ellis, Darryll T. Pederson

Conservation and Survey Division

No abstract provided.


Stratigraphy, Petrology, And Paleontology Of The Late Cretaceous (Campanian) Mesaverde Group In Northeastern Utah, Christopher Ward 2017 Utah State University

Stratigraphy, Petrology, And Paleontology Of The Late Cretaceous (Campanian) Mesaverde Group In Northeastern Utah, Christopher Ward

All Graduate Plan B and other Reports

This project examines a poorly studied sandstone ridge called Snake John Reef located 22 miles southeast of Vernal, in northeastern Utah. Previously this ridge was mapped as exposures of late Cretaceous, undifferentiated Mesaverde Group, and recently unidentified dinosaur fossils have been found along the ridge by the Utah Field House of Natural History State Park Museum. Stratigraphic sections, petrographic thin sections, and collection and study of fossils from Snake John Reef were undertaken to understand the stratigraphic relationship as well as to reconstruct the depositional environment of the dinosaur bearing units. Snake John Reef represents exposures of three late Cretaceous ...


Dental Microwear Textures Of Paranthropus Robustus From Kromdraai, Drimolen, And An Enlarged Sample From Swartkrans: Ecological And Intraspecific Variation, Alexandria Sachiko Peterson 2017 University of Arkansas, Fayetteville

Dental Microwear Textures Of Paranthropus Robustus From Kromdraai, Drimolen, And An Enlarged Sample From Swartkrans: Ecological And Intraspecific Variation, Alexandria Sachiko Peterson

Theses and Dissertations

The original microwear texture baseline for South African hominins was done by Scott et al. (2005) and concluded that Paranthropus robustus exhibited higher complexity values (Asfc) that are seen in occasional hard object feeders. Australopithecus africanus has higher anisotropy values (epLsar) consistent with consuming tough objects. This study expands upon this baseline by increasing the sample size from n = 9 for P. robustus and n = 10 for Au. africanus to n = 66 and n = 44, respectively. Additionally, this study incorporates multiple different sites and deposits. The P. robustus sample includes Drimolen, Kromdraai, and an expanded sample from Swartkrans, incorporating samples ...


Middle Miocene Paleoenvironmental Reconstruction Of The Central Great Plains From Stable Carbon Isotopes In Large Mammals, Willow H. Nguy 2017 University of Nebraska-Lincoln

Middle Miocene Paleoenvironmental Reconstruction Of The Central Great Plains From Stable Carbon Isotopes In Large Mammals, Willow H. Nguy

Dissertations & Theses in Earth and Atmospheric Sciences

Middle Miocene (18-12 Mya) mammalian faunas of the North American Great Plains contained a much higher diversity of apparent browsers than any modern biome. This has been attributed to greater primary productivity, which may have supported greater browser diversity that commonly corresponds with densely vegetated habitats. However, several lines of proxy evidence suggest that open woodlands or savannas dominated middle Miocene biomes; neither of which support many browsers today. Stable carbon isotopes in mammalian herbivore tooth enamel were used to reconstruct vegetation structure of middle Miocene biomes.

Stable carbon isotopes in C3 dominated environments reflect vegetation density and herbivores ...


An Overview Of Secondary Aquifers In Nebraska, Dana P. Divine, Steven S. Sibray 2017 University of Nebraska - Lincoln

An Overview Of Secondary Aquifers In Nebraska, Dana P. Divine, Steven S. Sibray

Conservation and Survey Division

No abstract provided.


Interpretive Geologic Cross Sections Across Lower Platte North Natural Resources District, Nebraska (Ccs-20), Dana Divine 2017 University of Nebraska - Lincoln

Interpretive Geologic Cross Sections Across Lower Platte North Natural Resources District, Nebraska (Ccs-20), Dana Divine

Conservation and Survey Division

No abstract provided.


Paleoecological Analysis Of The Clayton Formation (Paleocene) Near Malvern, Arkansas, Brenna J. Hart 2017 The University of Southern Mississippi

Paleoecological Analysis Of The Clayton Formation (Paleocene) Near Malvern, Arkansas, Brenna J. Hart

Honors Theses

The Clayton Formation is a section of the Midway Group immediately above the Cretaceous-Paleogene boundary that contains marine fossils from the Paleocene Epoch. The formation is composed of glauconitic sand, clay, marl, and limestone. Fossils within the formation commonly occur in clay or are concentrated in conglomeratic lag lenses. To assess paleoecology of the region during the Paleocene, the Clayton Formation was sampled for fossil content at a distinctly visible exposure along Interstate 30 near Malvern, Arkansas, that was excavated as part of a landslide mitigation project. Complimentary sites were sampled nearby along the Ouachita River and behind a shopping ...


The Homology And Phylogeny Of The Diploporita (Blastozoa: Echinodermata), Sarah Lynne Sheffield 2017 University of Tennessee, Knoxville

The Homology And Phylogeny Of The Diploporita (Blastozoa: Echinodermata), Sarah Lynne Sheffield

Doctoral Dissertations

Evolutionary relationships of extinct echinoderms are poorly understood, especially within stem-bearing blastozoans, a large group of echinoderms with unique respiratory structures and feeding brachioles. They were highly experimental in their body plans and very unlike echinoderms today (e.g., sea urchins). Many of the blastozoan subgroups recognized in recent classifications do not represent clades (natural associations of organisms derived from a single ancestor); they are either grades of organization or groups united by superficially similar features. Consequently, these ‘traditional’ groupings cannot be used to analyze evolutionary questions, such as biogeography or rates of evolution. This problem is highlighted within the ...


A Floral Assemblage Of The Upper Cretaceous El Gallo Formation, El Rosario, Baja California, Mexico, Reilly F. Hayes, Marisol Montellano-Ballesteros, Gerardo Álvarez-Reyes, René Hernandez-Rivera, David E. Fastovsky 2017 Department of Geosciences, University of Rhode Island

A Floral Assemblage Of The Upper Cretaceous El Gallo Formation, El Rosario, Baja California, Mexico, Reilly F. Hayes, Marisol Montellano-Ballesteros, Gerardo Álvarez-Reyes, René Hernandez-Rivera, David E. Fastovsky

Senior Honors Projects

Over the past eight months, I have collaborated with paleontologists from the Universidad Nactional Autónoma de México to formally describe plant fossils they uncovered in Baja California between their 2013 and 2016 field seasons. We report the first floral assemblage of the dinosaur-aged El Gallo Formation, Baja California, Mexico, a small (82-specimen) collection of plant fossils from fossil soils contained within the 75.84 +/- 0.05 to 74.55 +/- 0.09 million-year-old El Disecado Member of the unit. A compound fruit belonging to the genus Operculifructus, previously reported from the 3.40 to 1.08 million year younger Cerro del ...


Paleoimagery: The Artistic Restoration Of Dinosaurs And Prehistoric Life, Colin McNulty 2017 Bowling Green State University

Paleoimagery: The Artistic Restoration Of Dinosaurs And Prehistoric Life, Colin Mcnulty

Honors Projects

My purpose in creating this paper is to research a holistic view of paleontological illustration (also called paleoimagery or paleoart). A thorough history of paleoimagery is outlined from its roots in biblical illustration in the 17th and 18th centuries approaching the modern day. A two-fold examination of the utility of art to communicate science and its use within the science of paleontology is also given. This includes discussions of the specific components of art pieces that help them to successfully communicate scientific ideas and examples of how paleoimagery contributes to paleontology. The author then outlines the conception and ...


Exploring The Calvert Cliffs: Interpreting Classic Miocene Sequences Through The Application Of Strontium Isotope Stratigraphy And Paleoecology, Joshua B. Zimmt 2017 College of William and Mary

Exploring The Calvert Cliffs: Interpreting Classic Miocene Sequences Through The Application Of Strontium Isotope Stratigraphy And Paleoecology, Joshua B. Zimmt

Undergraduate Honors Theses

The Calvert Cliffs (Maryland, USA) is a classic condensed Miocene sequence that has attracted much scientific attention for its laterally extensive and highly condensed fossil beds (Kidwell, 1982a). Several meters thick and up to 70% shell material, the period of formation of these major complex shell beds has been debated for decades. Kidwell (1989) and associated studies have demonstrated that the major complex shell beds possess certain characteristics that suggest the beds formed as a succession of condensed parasequences during a transgressive systems tract. However, no quantitative analysis has calculated the period of formation of the major complex shell beds ...


Understanding Feathered Dinosaurs, Michael D. Sprague 2017 Cedarville University

Understanding Feathered Dinosaurs, Michael D. Sprague

The Research and Scholarship Symposium

Young-earth creationists hold to separate creations of birds and land animals due to a literal interpretation of Genesis 1:20-25, which describes their creations on different days. As such, they oppose the conventional model of theropod-to-bird evolution. For many years, there were few Mesozoic birds known, namely Hesperornis and Icthyornis. Specimens such as Archaeopteryx, found in 1861, seemed to strengthen the argument for the proposed transition. However, even after John Ostrom reinvigorated the idea of dinosaur-to-bird evolution in 1960 with the discovery of Deinonychus, evidence of this transition was still sparse. In the 1990’s, exquisitely-preserved dinosaur fossils began to ...


A Correlation And Stratigraphy Of Detailed Measured Core Sections Of The Waynesville And Liberty Formations (Katian; Richmondian) - Transecting Warren, Clinton, And Fayette Counties Of Ohio, Mark P. Guilliams 2017 Cedarville University

A Correlation And Stratigraphy Of Detailed Measured Core Sections Of The Waynesville And Liberty Formations (Katian; Richmondian) - Transecting Warren, Clinton, And Fayette Counties Of Ohio, Mark P. Guilliams

The Research and Scholarship Symposium

The stratigraphy of the Cincinnatian is difficult to understand and interpret which has resulted in various models for deposition ranging from a layer cake model with continuous beds to completely discontinuous beds. The interest of this study is the Liberty and Waynesville Formations (previously part of the Bull Fork Formation); these are Late Ordovician (Katian; Richmondian) units of predominantly limestone and shale. This project assesses the continuity of fine scale beds within these formations across a small area (approx. the size of Ohio’s Clinton County) by correlating measured sections from drill cores. The project involved the study of five ...


Understanding Feathered Dinosaurs, Michael D. Sprague 2017 Cedarville University

Understanding Feathered Dinosaurs, Michael D. Sprague

The Research and Scholarship Symposium

Young-earth creationists hold to separate creations of birds and land animals due to a literal interpretation of Genesis 1:20-25, which describes their creations on different days. As such, they oppose the conventional model of theropod-to-bird evolution. For many years, there were few Mesozoic birds known, namely Hesperornis and Icthyornis. Specimens such as Archaeopteryx, found in 1861, seemed to strengthen the argument for the proposed transition. However, even after John Ostrom reinvigorated the idea of dinosaur-to-bird evolution in 1960 with the discovery of Deinonychus, evidence of this transition was still sparse. In the 1990’s, exquisitely-preserved dinosaur fossils began to ...


A Description Of A New Allosaurus (Dinosauria: Theropoda) Skull With Comparison To Additional Specimens, Michael D. Sprague 2017 Cedarville University

A Description Of A New Allosaurus (Dinosauria: Theropoda) Skull With Comparison To Additional Specimens, Michael D. Sprague

The Research and Scholarship Symposium

Allosaurus was a genus of large theropod dinosaur from the Late Jurassic Period (Kimmeridgian to early Tithonian). The history of the taxonomic classification of Allosaurus species is muddled at best, and the number of recognized species varies significantly between researchers. Most Allosaurs from the Morrison Formation are typically lumped into a single species, Allosaurus fragilis. Given the amount of variation seen in Allosaurs through the Morrison, the genus may more diverse than generally recognized. A nearly complete Allosaurus skull (CM 279) located in the Creation Museum in Petersberg, KY is described, with comparison of its skull morphology to two other ...


Results Of Test-Hole Drilling For Observation Well Planning In The Upper Loup Natural Resources District, Fall 2016, Douglas Hallum, Sue Olafsen Lackey 2017 University of Nebraska-Lincoln

Results Of Test-Hole Drilling For Observation Well Planning In The Upper Loup Natural Resources District, Fall 2016, Douglas Hallum, Sue Olafsen Lackey

Conservation and Survey Division

The High Plains Aquifer underlies much of Nebraska (Figure 1). It is the primary source of groundwater within the Upper Loup Natural Resources District (ULNRD) of central Nebraska (Figure 2). Water derived from the aquifer is an important natural resource for the area and supplies water for recreation, wildlife and agriculture, as well as domestic, municipal, and industrial uses. A general lack of water level observations in the region (Figure 3), recently developed groundwater irrigated acres along the upper Calamus River (Figure 4), falling spring water levels measured in existing irrigation wells (Figure 5), and a stable to falling stream ...


Preservation Of Sea Anemone Burrows In Silurian (~432 Million Years Old) Carbonate Rocks Of Southeastern Indiana, Usa, Marissa Tomin 2017 The University of Akron

Preservation Of Sea Anemone Burrows In Silurian (~432 Million Years Old) Carbonate Rocks Of Southeastern Indiana, Usa, Marissa Tomin

Honors Research Projects

Preservation of trace fossils (ichnofossils) in siliciclastic environments is often quite different from preservation in carbonate environments, representing an important source of variation that must be well understood in order to enhance interpretations of paleoenvironments and paleoecology. This study focuses on Conostichus, a relatively common burrow constructed by solitary sea anemones. These trace fossils are generally well-preserved (i.e., they display detailed external features) in siliciclastic rocks but are typically little more than conical masses in carbonate rocks. However, certain specimens recovered from the middle Silurian Massie Formation at the Napoleon quarry of southeastern Indiana are composed entirely out of ...


Nebraska, Usa: Wonderful Fossils, Natural History Museums And Public Art Depicting Fossils, Robert F. Diffendal Jr 2017 University of Nebraska-Lincoln

Nebraska, Usa: Wonderful Fossils, Natural History Museums And Public Art Depicting Fossils, Robert F. Diffendal Jr

Robert F. Diffendal, Jr., Publications

Nebraska is known by vertebrate palaeontologists as the place in North America where there is a very complete Cenozoic geologic record of mammalian evolution over the last thirty-five million years or so. All you have to do is visit any of the many major natural history museums in the USA and in many countries around the world, including the UK, to see fossil skulls, articulated skeletons and large slabs of rock containing bones of fossil mammals from Nebraska to verify this assertion. Nebraska is also the site of Cretaceous rocks containing the oldest known Cretaceous fossil flower and many other ...


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