Paleoecology Of Nebraska’S Ungulates During The Eocene-Oligocene Climate Transition,
2013
University of Nebraska-Lincoln
Paleoecology Of Nebraska’S Ungulates During The Eocene-Oligocene Climate Transition, Grant S. Boardman
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
The White River Group (WRG) preserves the Eocene-Oligocene climate transition (EOCT), an interval of global cooling and drying during the onset of Antarctic glaciation. In the Great Plains, a shift from forested conditions to drier woodland-savanna biomes is hypothesized to have occurred at this time. I test this hypothesis through the analyses of several paleoenvironmental proxies on the teeth of 12 WRG ungulate species: stable carbon and oxygen isotopes from tooth enamel, and mesowear and microwear texture. The EOCT shift toward more open habitats and lower vegetation density under drying climates should have resulted in an increase in mean carbon …
Preliminary Groundwater Level Changes At Selected Sites In Nebraska Following The Drought Of 2012,
2013
University of Nebraska - Lincoln
Preliminary Groundwater Level Changes At Selected Sites In Nebraska Following The Drought Of 2012, Aaron R. Young, Mark E. Burbach, Leslie M. Howard
Conservation and Survey Division
No abstract provided.
A New Age Finding In The Central Sakarya Region (Nw Turkey),
2013
Bulletin of the Mineral Research and Exploration
A New Age Finding In The Central Sakarya Region (Nw Turkey), Mehmet Fuat Uğuz
Bulletin of the Mineral Research and Exploration
The existence of a metamorphic basement cut by granitoids is known in the Central Sakarya region of northwest Turkey according to the previous studies. Over this metamorphic basement, there is a Liassic unit which contains ammonite, brachiopod and some benthic foraminifers and has a sequence starting with fluvial deposits at the base and grading into coastal, subtidal and shallow marine sediment character towards the top in the vicinity of Sarıcakaya district, Eskişehir City. At different levels of this unit which is called as the “Kapıkaya Formation”, the Campanian age fossils such as; Ceratolithoides aculeus (Stradner), Pervilithus varius Crux, Watznaueria barnesae …
Descriptions Of Two New Families, Three New Species And Re-Description Of Four Known Genera And One Subfamily From The Larger Benthic Foraminifera Of Paleocene In Turkey,
2013
Bulletin of the Mineral Research and Exploration
Descriptions Of Two New Families, Three New Species And Re-Description Of Four Known Genera And One Subfamily From The Larger Benthic Foraminifera Of Paleocene In Turkey, Ercüment Si̇rel
Bulletin of the Mineral Research and Exploration
Two new foraminiferal families are introduced as follows: the Anatoliellidae (type
genus Anatoliella Sirel) in the superfamily Ataxophragmiacea Schwager and the family
Bolkarinidae (type genus Bolkarina Sirel) in the superfamily Orbitoidacea Schwager. Three
new species of Paleocene are described and figured as follows: Ranikothalia polatliensis,
Nurdanella paleocenica, Periloculina yilmazi. In addition, four known Paleocene genera
such as Bolkarina Sirel, Globoflarina Rahaghi, Nurdanella Özgen and Coskinon Hottinger
and Drobne and subfamily Globoflarininae are redescribed.
The Ostracod Fauna And Environmental Characteristics Of The Volcano Sedimentary Yol Üstü Formation In The Hinis Region, Erzurum (Eastern Anatolia), Turkey,
2013
Bulletin of the Mineral Research and Exploration
The Ostracod Fauna And Environmental Characteristics Of The Volcano Sedimentary Yol Üstü Formation In The Hinis Region, Erzurum (Eastern Anatolia), Turkey, Ümit Şafak
Bulletin of the Mineral Research and Exploration
The volcanosedimentary Yolüstü formation which outcrops in the vicinity of Hınıs Town, the southeast of Erzurum City, consists of conglomerate, marl, agglomerate, claystone, tuffite, fragmented travertine limestone with fragments of sand – pebble - plant, lacustrine limestone and tuffaceous – clayey limestone. In this formation, carefully selected 3 measured stratigraphic sections were taken at levels in which the lithology of hard travertine limestones with plant fragments and soft tuffaceous – clayey limestone are present. Washed samples which had been taken from these sections were studied and assessed, and then ostracods reflecting freshwater and brackish water environments were detected. In the …
Recently Described Vulture One Of Several New Avian Species From The Ashfall Fossil Beds,
2013
University of Nebraska - Lincoln
Recently Described Vulture One Of Several New Avian Species From The Ashfall Fossil Beds, Rick E. Otto
University of Nebraska State Museum: Programs Information
Several species of fossil bird are known from the Ashfall Fossil Beds. As of publication date, all represent previously undescribed species. In 2012, ornithologists Zhang, Feduccia and James described a vulture from isolated remains recovered from the Ashfall site in 1979. Similar in morphology to the Palm-nut Vulture (Gypohierax) of Africa, the relationship to the Ashfall vulture is unclear, and may represent an example of convergent evolution. The fossil vulture was designated Anchigyps voorhiesiin honor of paleontologist Michael Voorhies.
A Novel Report Of Hatching Plasticity In The Phylum Echinodermata.,
2013
College of William & Mary
A Novel Report Of Hatching Plasticity In The Phylum Echinodermata., A. Frances Armstrong, Holly N. Blackburn, Jonathan D. Allen
Jonathan Allen
No abstract provided.
The Flood/Post-Flood Boundary (Comment And Reply),
2013
Liberty University
The Flood/Post-Flood Boundary (Comment And Reply), Marcus R. Ross
Marcus R. Ross
First paragraph: Michael Oard’s recent article on the Flood/post-Flood boundary consists of two parts: the first is response to my earlier paper on utilizing mammalian biostratigraphy in evaluating post-Flood boundary locations, which found placement of this boundary at or near the Pliocene/Pleistocene boundary untenable; the second part is a set of disparate observations placed in support of a high post-Flood boundary placed at variable locations in the “Late Cenozoic”. (comment continues; download for full comment and reply by Michael Oard)
Field Guide For Nebraska Invasive Insects,
2013
University of Nebraska - Lincoln
Field Guide For Nebraska Invasive Insects, Nebraska Invasive Species Project
Conservation and Survey Division
No abstract provided.
Three-Dimensional Hydrostratigraphy Of The Firth, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping In The Eastern Nebraska Water Resources Assessment (Enwra),
2013
University of Nebraska-Lincoln
Three-Dimensional Hydrostratigraphy Of The Firth, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping In The Eastern Nebraska Water Resources Assessment (Enwra), Jesse T. Korus, R. Matthew Joeckel, Dana Divine
Conservation and Survey Division
No abstract provided.
Three-Dimensional Hydrostratigrapy Of The Swedeburg, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping For The Eastern Nebraska Water Resources Assessment (Enwra),
2013
University of Nebraska-Lincoln
Three-Dimensional Hydrostratigrapy Of The Swedeburg, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping For The Eastern Nebraska Water Resources Assessment (Enwra), Dana Divine, Jesse T. Korus
Conservation and Survey Division
No abstract provided.
Nebraska Statewide Groundwater-Level Monitoring Report 2013,
2013
University of Nebraska-Lincoln
Nebraska Statewide Groundwater-Level Monitoring Report 2013, A. R. Young, M. E. Burbach, L. M. Howard
Conservation and Survey Division
No abstract provided.
Ecology Of The Late Neogene Extinctions: Perspectives From The Plio-Pleistocene Of Florida,
2013
University of South Florida
Ecology Of The Late Neogene Extinctions: Perspectives From The Plio-Pleistocene Of Florida, Shubhabrata Paul
USF Tampa Graduate Theses and Dissertations
The ecological impact of past extinction events is one of the central issues in paleobiology. In face of present environmental changes, a better understanding of past extinctions will enable us to identify the magnitude of biodiversity crises and their underlying processes. The Late Neogene was a time of extraordinary climatic reorganization, including Northern Hemisphere glaciation, the rise of the Central American Isthmus, and associated changes in environmental conditions. Therefore, the Late Neogene extinctions of marine molluscs of South Florida present an ideal platform to examine the interaction between environmental changes and biotic response. In the present study, three different aspects …
Microbially Induced Sedimentary Structures Recording An Ancient Ecosystem In The Ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia,
2013
Old Dominion University
Microbially Induced Sedimentary Structures Recording An Ancient Ecosystem In The Ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia, Nora Noffke, Daniel Christian, David Wacey, Robert M. Hazen
OES Faculty Publications
Microbially induced sedimentary structures (MISS) result from the response of microbial mats to physical sediment dynamics. MISS are cosmopolitan and found in many modern environments, including shelves, tidal flats, lagoons, riverine shores, lakes, interdune areas, and sabkhas. The structures record highly diverse communities of microbial mats and have been reported from numerous intervals in the geological record up to 3.2 billion years (Ga) old. This contribution describes a suite of MISS from some of the oldest well-preserved sedimentary rocks in the geological record, the early Archean (ca. 3.48 Ga) Dresser Formation, Western Australia. Outcrop mapping at the meter to …
Stromatolites And Miss—Differences Between Relatives,
2013
Old Dominion University
Stromatolites And Miss—Differences Between Relatives, N. Noffke, S. M. Awramik
OES Faculty Publications
Benthic microorganisms form highly organized communities called “biofilms.” A biofilm consists of the individual cells plus their extracellular polymeric substances (EPS). In marine and non-marine environments, benthic microbial communities interact with the physical sediment dynamics and other factors in the environment in order to survive. This interaction can produce distinctive sedimentary structures called microbialites. Binding, biostabilization, baffling, and trapping of sediment particles by microorganisms result in the formation of microbially induced sedimentary structures (MISS); however, if carbonate precipitation occurs in EPS, and these processes happen in a repetitive manner, a multilayered build-up can form—stromatolites. Stromatolites and MISS are first found …
Morphometric Analysis Of Dinosaur Tracks From Southwest Arkansas,
2013
University of Arkansas, Fayetteville
Morphometric Analysis Of Dinosaur Tracks From Southwest Arkansas, R. Shell, Stephen K. Boss
Journal of the Arkansas Academy of Science
Dinosaur trackways were discovered in Cretaceous De Queen Limestone strata in Howard County, Arkansas, in June 2011. Multiple trackways with variably sized tridactyl tracks were exposed in a commercial quarry, suggesting multiple theropod species or adult and juvenile tracks of a single species. Results of morphometric analyses of 32 plaster casts from selected trackways are reported in an effort to identify the specific track-making dinosaurs and differentiate large and small tracks. Track measurements included length and width of each track, the lengths and widths of each digit impression, and the angular spread (divarication) between digit impressions. Twenty-nine plaster casts were …
Saturated Thickness Of The Unconfined Portions Of The High Plains Aquifer,
2013
University of Nebraska - Lincoln
Saturated Thickness Of The Unconfined Portions Of The High Plains Aquifer, Conservation And Survey Division
Conservation and Survey Division
No abstract provided.
Groundwater-Level Changes In Nebraska - Spring 2012 To Spring 2013,
2013
University of Nebraska-Lincoln
Groundwater-Level Changes In Nebraska - Spring 2012 To Spring 2013, A. Young, M. E. Burbach, L. M. Howard
Conservation and Survey Division
No abstract provided.
Tree-Ring Evidence Of North Pacific Volcanically Forced Cooling And Forcing Of The Pacific Decadal Oscillation (Pdo),
2013
The College of Wooster
Tree-Ring Evidence Of North Pacific Volcanically Forced Cooling And Forcing Of The Pacific Decadal Oscillation (Pdo), Lauren Vargo
Senior Independent Study Theses
Two large undocumented volcanic eruptions in 1698/9 and 1809 have been previously identified in ice cores as sulfate peaks, and in tree-ring latewood density data as low-density rings. These eruptions can also be recognized using tree-ring width data, and can be identified in the tree-ring record as narrow rings for several consecutive years. The first part of this study uses tree-ring width data from the Gulf of Alaska to provide further evidence that these eruptions occurred. The two eruptions also provide a natural experiment for investigating the effects large volcanic eruptions have on North Pacific climate, including the Pacific Decadal …
A History Of Place: Using Phytolith Analysis To Discern Holocene Vegetation Change On Sanak Island, Western Gulf Of Alaska,
2013
Antioch University - New England
A History Of Place: Using Phytolith Analysis To Discern Holocene Vegetation Change On Sanak Island, Western Gulf Of Alaska, Cricket C. Wilbur
Antioch University Full-Text Dissertations & Theses
This study investigated a terrestrial climate proxy, phytoliths, as a complimentary approach to documenting the dynamics of present and past vegetation on Sanak Island, the largest island in a small island group in the eastern Aleutian archipelago, and as a new basis by which to interpret Holocene environmental variability in Alaska. A phytolith reference collection was established from 59 selected plant species of maritime tundra belonging to 27 families. The grass species and a sedge species produced abundant phytolith forms whereas the majority of dicotyledons in this study were trace producers of phytoliths. A paleoenvironmental reconstruction from fossil phytoliths recovered …
