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Showing 1 to 20 of 214 for “"Ordovician"”.

  1. Temperature trends of the Late Cambrian through the Middle Ordovician : implications for Ordovician climate and biodiversification

    Speir, LauraUniversity of Missouri--Columbia2019

    … UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The Ordovician Period includes both the largest and longest period of sustained biodiversification--the Great Ordovician Biodiversification Event (GOBE)--and the second-largest mass extinction of the Phanerozoic--the end Ordovician mass extinction. …

    missouri Repository record

  2. Ordovician corals of the Williston Basin periphery

    Caramanica, Frank P.

    … and rugose corals are described from the Ordovician Red River) Stony Mountain, and Stonewall Formations in southern Manitoba and the Ordovician Bighorn Formation in northern Wyoming. Fifty-four species, 12 of which are new, are distributed in 20 genera. The Flower Model of coral evolution, …

    nodak Repository record

  3. The palynology of selected Ordovician localities in Scotland

    Whelan, Gillian M.University of Glasgow1988

    Ordovician samples have been collected from various places from within three separate terranes in Scotland; the Highland Border Complex, the Southern Uplands and the Midland Valley. The samples have been palynologically processed and their assemblages studied with the aim of understanding some of …

    glasgow Repository record

  4. Some Richmond (Ordovician) Ostracodes From Indiana and Ohio

    Guber, Albert LeeUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-04T19:14:17Z (GMT). No. of bitstreams: 1 6206146.pdf: 4365043 bytes, checksum: b9b55655365f6ccb80aa716ce452cdc1 (MD5) Previous issue date: 1962

    uiuc Repository record

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

    Hughes, ChristopherQueen's University Belfast1967

    qu-belfast Repository record

  6. Possible Groundwater Denitrification in the Decorah Formation (Middle Ordovician)

    Ignatius, Ashley

    … Decorah Formation is a marine shale of Middle Ordovician age, overlain by an upper carbonate aquifer, that is contaminated with nitrate. The shale may contain electron donors for denitrification in the forms of organic carbon and sulfur minerals. </p><p>Three shallow monitoring wells were …

    nodak Repository record

  7. Chemostratigraphy of the Uppermost Cambrian Below the Ordovician GSSP

    Wang, LishaBrock University2018

    … Section and Point (GSSP) of the Cambrian‒Ordovician boundary is located at Green Point in the Green Point Formation of the Cow Head Group in western Newfoundland, Canada. To reconstruct a continuous and high-resolution chemostratigraphy from the Cambrian‒Ordovician boundary to the …

    brock Repository record

  8. The ordovician section and faunal succession in Southeastern Minnesota

    Fleener, Frank Leslie2016

    Made available in DSpace on 2016-11-09T23:47:27Z (GMT). No. of bitstreams: 2 5984787_opt.pdf: 6224126 bytes, checksum: 20877354621e0a25c776b3c2b95f3514 (MD5) license.txt: 4183 bytes, checksum: 1dcc2037833d76bede73d5717587543b (MD5) Previous issue date: 1914

    uiuc Repository record

  9. Stratigraphy of Cambrian and Ordovician Formations of Northeastern Illinois

    Buschbach, T.C.University of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-04T19:13:53Z (GMT). No. of bitstreams: 1 6000155.pdf: 6181598 bytes, checksum: 2319cb49fe049d26cdf81eea0f9c610e (MD5) Previous issue date: 1959

    uiuc Repository record

  10. Regional dolomitization of Early Ordovician, Upper Knox Group, Appalachians

    Montañez, Isabel PatriciaVirginia Polytechnic Institute and State University1989

    The Early Ordovician, Upper Knox Group consists of meter-scale shallowing-upward cycles that were deposited on a low-sloping ramp. Cycles formed in response to short term (<100 k.y.) eustatic sea-level fluctuations and typically have well developed tidal flat caps. Cycles are bundled into five …

    vt Repository record

  11. Community gradients in the Martinsburg formation (Ordovician), southwestern Virginia

    Springer, Dale A.Virginia Polytechnic Institute and State University1982

    … present. Faunas of the Martinsburg Formation (Ordovician) in southwestern Virginia offer an excellent opportunity to test the applicability of gradient analysis in a paleoecological setting. A broad spectrum of environments, from nearshore to open-marine, elastic to carbonate-dominated facies, …

    vt Repository record

  12. Hydrochemistry and sources of fluoride in Silurian-Ordovician aquifer system

    Haamer, Kadri2006

    tartu

  13. Ostracod associations of the Ordovician–Silurian boundary interval in Baltoscandia

    Truuver, Karin2021

    tartu

  14. The upper Red River Formation (Ordovician) in western North Dakota

    Friestad, Harlan K.

    <p>The upper Red River Formation in Western North Dakota consists of cyclic sedimentary rocks having four main porosity zones which contain most of the oil and gas found in the formation. It was divided into three distinct units that were traced throughout western North Dakota on mechanical logs. …

    nodak Repository record

  15. Upper Ordovician and lowest Silurian graptolite biostratigraphy in southern Scotland

    Williams, Stephen HenryUniversity of Glasgow1981

    Abstract available p. [ix]-[xi]

    glasgow Repository record

  16. Cambrian and Ordovician Conodonts From the Big Horn Mountains, Wyoming

    Cygan, Norbert EverettUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-04T19:14:20Z (GMT). No. of bitstreams: 1 6303226.pdf: 3178146 bytes, checksum: 552f549560195bf2dc446a24634893c0 (MD5) Previous issue date: 1962

    uiuc Repository record

  17. Upper Ordovician stratigraphy and trilobites in the southern Lake District.

    McNamara, Kenneth JamesUniversity of Cambridge1976

    cambridge

  18. Allostratigraphy of the Upper Ordovician Blue Mountain Formation, Southwestern Ontario, Canada

    Sweeney, Sarah NThe University of Western Ontario2014

    The Upper Ordovician units in Southwestern Ontario record the distal response to the development of the Taconic Appalachian foreland basin. The proximal representation in Ohio and Pennsylvania, contain the Utica/Point Pleasant Play (!). The relationship between the proximal and distal portions of …

    uwo Repository record

  19. Early diagenesis of Ordovician and Silurian Bentonites in the Northern Baltic Palaeobasin

    Hints, Rutt2009

    tartu

  20. Discontinuities in the Icebox Formation (Ordovician), Williston Basin, North Dakota and Montana

    Ulishney, Aaron J.

    <p>The Ordovician Winnipeg Group is composed of three formations; in ascending order, the Black Island Formation, the Icebox Formation, and the Roughlock Formation. The Icebox Formation is largely composed of shale. This work shows that discontinuities and coarser facies exist within the Icebox …

    nodak Repository record

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