Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Nebraska (3)
- Annual (2)
- Biostratigraphy (2)
- Outflow (2)
- Paleoecology (2)
-
- Water (2)
- 1950 (1)
- 2010 (1)
- Aluminite (1)
- Alunite (1)
- Annual Inflow (1)
- Antarctica (1)
- Arctic (1)
- CONOP (1)
- Cores (1)
- Cuttings (1)
- Describing (1)
- Devon Island (1)
- Diatoms (1)
- Fossil Marine Diatoms (1)
- Gibbsite (1)
- Inflow (1)
- Late Cretaceous (1)
- List (1)
- Miocene (1)
- Pyrite oxidation (1)
- Reference (1)
- Rocks (1)
- Sedimentary (1)
- Sediments (1)
- Publication
-
- Conservation and Survey Division (4)
- Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research (2)
- Bulletin of the University of Nebraska State Museum (1)
- Department of Earth and Atmospheric Sciences: Faculty Publications (1)
- Great Plains Research: A Journal of Natural and Social Sciences (1)
Articles 1 - 9 of 9
Full-Text Articles in Paleontology
The Application Of Biostratigraphy And Paleoecology At Southern Ocean Drill Sites To Resolve Early To Middle Miocene Paleoclimatic Events, Ryan Farmer
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
The diatom biostratigraphy and paleoceanography of Ocean Drilling Program (ODP) Site 744 on the Southern Kerguelen Plateau, southern Indian Ocean are documented for the early to middle Miocene to improve chronostratigraphic age control for the Southern Ocean and Antarctic region. Paleoenvironmental fluctuations in the Southern Ocean are inferred from changes in fossil diatom abundance, preservation, and assemblage composition. A robust, new age model for Holes 744A and 744B is constructed using Constrained Optimization (CONOP) model ages for diatom biostratigraphic datum levels and new magnetic polarity data, which enables assessment of a nearly continuous record of paleoenvironmental change from ~20.25 to …
New Stable Isotope Record Of Paleoecological Change In The Late Neogene Of The Western Great Plains From Enamel In Large Mammals, Zachary Kita
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
An expansion of C4 grasslands occurred between 6 and 8 million years ago in the Great Plains of North America, as evidenced by a marked shift to more 13C-enriched carbon isotope compositions from large fossil mammal tooth enamel and paleosol carbonates. Prior to this expansion, habitats were comprised of exclusively C3 vegetation. To explore this problem I present a compilation of bulk stable carbon (δ13C) and oxygen (δ18O) isotope values from a variety of large mammals from 6 localities that span from the late Clarendonian to the late Blancan in Nebraska. As expected, …
Taxonomic Composition, Paleoecology And Biostratigraphy Of Late Cretaceous Diatoms From Devon Island, Nunavut, Canadian High Arctic, Jakub Witkowski, David M. Harwood, Karen Chin
Taxonomic Composition, Paleoecology And Biostratigraphy Of Late Cretaceous Diatoms From Devon Island, Nunavut, Canadian High Arctic, Jakub Witkowski, David M. Harwood, Karen Chin
Department of Earth and Atmospheric Sciences: Faculty Publications
Upper Cretaceous sediments of the Kanguk Formation exposed in Eidsbotn and Viks Fiord grabens on Devon Island, Nunavut, Canadian High Arctic, yielded 91 fossil marine diatom species and varieties (including indeterminate taxa), representing 41 genera. Excellent preservation of the assemblages was aided by shallow burial, protection in downfaulted linear grabens, and the presence of abundant volcanic material. Planktonic species and resting spores comprise nearly 70% of the diatom assemblage, and provided abundant food resources for the Late Cretaceous Arctic ecosystem. Deposition of the approximately 225 m-thick stratigraphic sequence was predominantly in a shallow marine neritic setting, with an upward progression …
Review Of Barnum Brown: The Man Who Discovered Tyrannosaurus Rex. By Lowell Dingus And Mark A. Norell., Donald M. Henderson
Review Of Barnum Brown: The Man Who Discovered Tyrannosaurus Rex. By Lowell Dingus And Mark A. Norell., Donald M. Henderson
Great Plains Research: A Journal of Natural and Social Sciences
The book itself is well written, and follows Brown's life chronologically from birth to death. Along the way, the narrative delves, sometimes quite deeply, into the people and events, both American and foreign, that would have influenced Brown's life and work at the time. The reams of facts, figures, and dates in the book are meticulously referenced using the extensive archives of the AMNH. Brown was notorious for not keeping field notes, and correspondence to and from the field with his bosses, as well as annual reports, are the sources for most of the details of Brown's life while associated …
Secondary Minerals From Extrapedogenic Per Latus Acidic Weathering Environments At Geomorphic Edges, Eastern Nebraska, Usa, Robert Matthew Joeckel, K.D. Wally, B.J. Ang Clement, P.R. Hanson, J.S. Dillon, S.K. Wilson
Secondary Minerals From Extrapedogenic Per Latus Acidic Weathering Environments At Geomorphic Edges, Eastern Nebraska, Usa, Robert Matthew Joeckel, K.D. Wally, B.J. Ang Clement, P.R. Hanson, J.S. Dillon, S.K. Wilson
Conservation and Survey Division
Acidic weathering of the sulfidic Upper Cretaceous Carlile and Pierre Shales in Nebraska has led to the precipitation of the Al sulfate–hydroxide minerals aluminite, alunite, “basaluminite”/felsöbányaite (e.g.,), the aluminum hydroxides gibbsite and bayerite, and the rare Al phosphate hydroxide vashegyite. Kaolinite has also been produced as a result of this acidic weathering. These minerals do not appear as neoformed constituents in any extant soils in the region, and their existence underscores the ability of pyrite oxidation to produce major changes in mineralogy on a Holocene to Recent time scale. Jarosite, hydronium jarosite, gypsum, halotrichite, and melanterite also appear as secondary …
Tapeworms Of Elasmobranchs (Part Iii) A Monograph On The Phyllobothriidae (Platyhelminthes, Cestoda), Timothy R. Ruhnke
Tapeworms Of Elasmobranchs (Part Iii) A Monograph On The Phyllobothriidae (Platyhelminthes, Cestoda), Timothy R. Ruhnke
Bulletin of the University of Nebraska State Museum
This monograph aims to provide information on the taxonomic status of all genera associated with the tetraphyllidean family Phyllobothriidae. Full treatments of the three valid species of the type genus, Phyllobothrium, in addition to the 47 valid species of Clistobothrium, Crossobothrium, Marsupiobothrium, Monorygma, Nandocestus, Orectolobicestus, Orygmatobothrium, Paraorygmatobothrium, Ruhnkecestus, and Scyphophyllidium are provided, as is a taxonomic history of the family. Of the valid genera historically associated with the family, only Phyllobothrium is considered to be an unambiguous member of the family. The genera Bibursibothrium, Calyptrobothrium, Cardiobothrium, Clistobothrium, Crossobothrium, Doliobothrium, Flexibothrium, Marsupiobothrium, Monorygma, Nandocestus, Orectolobicestus, Orygmatobothrium, Paraorygmatobothrium, Ruhnkecestus, Scyphophyllidium …
Annual Outflow And Annual Inflow Of Water From/To Nebraska, 1950- 2010, Susan Olafsen-Lackey
Annual Outflow And Annual Inflow Of Water From/To Nebraska, 1950- 2010, Susan Olafsen-Lackey
Conservation and Survey Division
No abstract provided.
Reference List For Describing Cuttings And Cores Of Sediments And Sedimentary Rocks In Nebraska, J. T. Korus, Robert Matthew Joeckel, P. R. Hanson, J. W. Goeke, S. O. Lackey, M. B. Burbach
Reference List For Describing Cuttings And Cores Of Sediments And Sedimentary Rocks In Nebraska, J. T. Korus, Robert Matthew Joeckel, P. R. Hanson, J. W. Goeke, S. O. Lackey, M. B. Burbach
Conservation and Survey Division
No abstract provided.
Annual Outflow Of Water From Nebraska, 1950 - 2010, S. Olafsen-Lackey
Annual Outflow Of Water From Nebraska, 1950 - 2010, S. Olafsen-Lackey
Conservation and Survey Division
No abstract provided.