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Showing 1 to 20 of 23 for “"trilobite"”.

  1. The ordovician trilobite fauna of the Builth-Llandrindod inlier

    Hughes, ChristopherQueen's University Belfast1967

    qu-belfast Repository record

  2. Stratigraphy, palaeoecology and trilobite faunas of the Valhatlfonna formation, Ny Friesland, Spitsbergen.

    Fortey, Richard Allen.University of Cambridge1972

    cambridge

  3. Geology and lower to middle Cambrian trilobite faunas of the southwest Avalon, Newfoundland.

    Fletcher, Terence Patrick.University of Cambridge1972

    cambridge

  4. Trilobite evolution and faunal distribution in some Ordovician rocks of the Builth inlier, central Wales

    Sheldon, Peter RichardUniversity of Cambridge1987

    cambridge

  5. The taxonomy, phylogeny and palaeobiogeography of the trilobite families pliomeridae and encrinuridae: reconstructing the Ordovician world using evolving lineages

    Peers, SimonUniversity of Glasgow1997

    The phylogeny of the Family Pliomeridae and the Ordovician representatives of the Encrinuridae was investigated using cladistics. This resulted in the diagnosis of seven subfamilies; five of pliomerids (including one erected herein) and two subfamilies of encrinurid: the Cybelinae and Encrinurinae. …

    glasgow Repository record

  6. Palaeobiology of Silurian trilobites from North Greenland

    Hughes, Helen ElizabethUniversity of Birmingham2010

    … of diverse and remarkably well preserved trilobites. The collections comprise 36 named trilobite species (32 new), and 30 under open nomenclature. These are assigned to 32 genera (six new). Members of the Scutelluidae (10 new species, four new genera), Illaenidae (one new species), …

    birmingham Repository record

  7. Middle Cambrian linguliformean brachiopods of the Pika and Sullivan formations, southern Canadian Rocky Mountains, Alberta, Canada

    Kline, Amy MarieUniversity of Saskatchewan2025

    … grainstone interbeds along with disarticulated trilobite sclerites and eocrinoid ossicles, all of which likely did not experience long-distance transport. Breakage of brachiopod valves is common in grainstone and is also observed alongside rare abrasion in lime mudstone, suggesting occasional …

    sask Repository record

  8. Biogeographic and biological comparisons between the Emu Bay Shale (Kangaroo Island, South Australia) and other Cambrian Burgess Shale-type biotas

    Holmes, James Dougal2016

    … examination of the moulting habits of two common trilobite species from the Emu Bay Shale, Estaingia bilobata Pocock, 1964 and Redlichia takooensis Lu, 1950, and how this compares with other BST assemblages. Specimens from the EBS were examined and arrangements of exoskeletal elements likely …

    adelaide Repository record

  9. Earliest Cambrian - latest Proterozoic ichnofossils and problematic fossils from Inyo County, California

    Langille, Gerald Burton

    … calcareous fossils beneath the oldest Cambrian trilobite fossils in the White-Inyo Mountains may correlate with a pre-trilobite biozone proposed for the Lower Cambrian in other parts of the world. Such a correlation is speculative since no diagnostic pre-trilobite body fossils or ichnofossils …

    binghamton Repository record

  10. Resolving Details of the Nonbiomineralized Anatomy of Trilobites Using Computed Tomographic Imaging Techniques

    Peteya, Jennifer AnitaThe Ohio State University2013

    Remains of two trilobite species, Elrathia kingii from the Wheeler Formation (Cambrian Series 3), Utah, and Cornuproetus cornutus from the Hamar Laghdad Formation (Middle Devonian), Alnif, Morocco, were studied using computed tomographic (CT) and microtomographic (micro-CT) imaging techniques for …

    ohiolink Repository record

  11. Carbon cycle changes during the end-Marjuman (Cambrian) extinction in the Southern Appalachians

    Gerhardt, Angela MaeVirginia Tech2014

    … Ordovician transition contains several trilobite extinctions. The first of these extinctions (the end-Marjuman) is thought to coincide with the Steptoean Positive Carbon Isotope Excursion or SPICE, a large and rapid excursion in the marine carbon isotope record. This excursion, which is …

    vt Repository record

  12. Trilobites and the Culture of Wonder in Antebellum America

    Priesendorf, Emma JoUniversity of Missouri--Kansas City2021

    … of invertebrate fossils, especially the trilobite, in historical sources. A short discussion of Charles Willson Peale’s Repository allows the reader to understand the culture of wonder at the beginning of the time period under review. Wonder, this paper argues, is a trope that can help …

    umkc Repository record

  13. Geology of the Damascus area

    Derby, James RichardVirginia Polytechnic Institute1961

    … fauna from the Widener limestone, and a single trilobite, Plethometopus sp. From the Conococheague formation are illustrated. The strata have been folded into five synclines and four anticlines and are broken by two major thrust faults, and Lodi thrust and the Holston Mountain thrust. The faults …

    vt Repository record

  14. Carbonate ramp to deeper shale-shelf transitions of an Upper Cambrian (Dresbachian) shelf embayment, Nolichucky Formation, southwest Virginia

    Markello, James RossVirginia Polytechnic Institute and State University1979

    … Ribbon limestones are layers and lenses of trilobite packstone, parallel and wave-rippled laminated quartzose calcisiltite and lime mudstone that occur in stormgenerated fining-upward sequences (1-5 cm thick) and as burrowed units. Deeper embayment facies are green, calcareous shale with …

    vt Repository record

  15. Geochemical investigations of the late early Cambrian extinctions

    Yang, YeziVirginia Tech2025

    … around 513 – 508 Ma and redlichiid and olenellid trilobites went extinct around 506 Ma. Both extinction events have been documented to occur with negative carbon isotope excursions (CIEs) that likely represent changes in the carbon cycle. The emplacement of the Kalkarindji Large Igneous Province …

    vt Repository record

  16. DETRITAL-ZIRCON GEOCHRONOLOGIC PROVENANCE ANALYSES THAT TEST AND EXPAND THE EAST SIBERIA - WEST LAURENTIA RODINIA RECONSTRUCTION

    MacLean, John Stuart

    … be the Anti-Atlas region of Morocco, based on trilobite evidence and detrital-zircon provenance information. Finally, I demonstrate two ways to involve K-12 students in geoscience research.

    montana-tech Repository record

  17. DETRITAL-ZIRCON GEOCHRONOLOGIC PROVENANCE ANALYSES THAT TEST AND EXPAND THE EAST SIBERIA - WEST LAURENTIA RODINIA RECONSTRUCTION

    MacLean, John Stuart

    … be the Anti-Atlas region of Morocco, based on trilobite evidence and detrital-zircon provenance information. Finally, I demonstrate two ways to involve K-12 students in geoscience research.

    montana Repository record

  18. Fayetteville and Imo Shales: Punctuated Upper Mississippian Shallowing Upward Sequence, Southern Ozark Region, Northern Arkansas

    Stevens, Joshua2021

    … and Manger, 2018), enrolled Paladin imoensis trilobite (Brezinski, 2008), and the taphonomy of fossil ammonoids, particularly Emstites fayettevillea (Gordon, 1965, 1964 imprint) and Anthracoceras discus (Frech, 1899) within the Fayetteville Shale and Imo Member of the Pitkin Limestone, …

    arkansas Repository record

  19. Paleontology and stratigraphy of the Nolichucky Formation in southwest Virginia and northeast Tennessee

    Derby, James RichardVirginia Polytechnic Institute1965

    … but the majority are of Dresbachian age. Trilobites are the most common faunal element with M8 genera and 85 species represented. Two new genera and eight new species are described. The late Middle Cambrian fauna occurs in the Nolichucky and Maryville formations and includes species of …

    vt Repository record

  20. Macrofossils and biostratigraphy of the Bakken Formation (Devonian and Mississippian) in western North Dakota

    Thrasher, Lawrence C.

    … pelecypods, straight and coiled cephalopods, a trilobite, a conchostracan, a shrimp-like organism, pelmatozoan columns, fish fragments, trace fossils, and Foerstia sp. and other plants. Fossils not treated herein are foraminiferids, ostracods conodonts, and palynomorphs.</p> <p>The macrofossils …

    nodak Repository record

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