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Showing 1 to 6 of 6 for “"Mid Jurassic"”.

  1. Palynological insights into the Mid Jurassic dinoflagellate radiation

    Wiggan, Nickolas JamesUniversity of Cambridge2017

    … this record indicates that the Bajocian of the Mid Jurassic (~170–168 Ma) represents a critical interval in dinoflagellate evolutionary history, marked by a rapid increase in the diversity of cysts from the family Gonyaulacaceae. From the Bajocian onwards, the Gonyaulacaceae have remained one of …

    cambridge Repository record

  2. The geology and mid-Jurassic amalgamation of Tracy Arm terrane and Stikinia of northwestern British Columbia.

    Currie, Lisel D.Carleton University1994

    carleton Repository record

  3. The evolution and palaeobiogeography of mesozoic planktonic foraminifera

    Hudson, Wendy2007

    … in the subsequent forty years our knowledge of Jurassic planktonic foraminifera has expanded considerably. A thorough re-evaluation of the Oberhauser and Fuchs collections in Vienna has shown that these species are probably not planktonic and that the first planktonic taxa appeared in the …

    plymouth Repository record

  4. Mantle melting processes: evidences from ophiolites, large igneous provinces, and intraplate seamounts

    Madrigal Quesada, Maria Del PilarVirginia Tech2016

    … studied melting at extensional environments, in mid-ocean ridges and back-arc basins, preserved in ophiolites. The Santa Elena Ophiolite in Costa Rica comprises a well-preserved fragment of the lithospheric mantle that formed along a paleo-spreading center. Petrological models of fractional …

    vt Repository record

  5. Evolution of tectonic and stratigraphic geometries in the Southern Outeniqua Basin

    Smithard, TravisDepartment of Geological Sciences2019

    … during the Mesozoic break-up of Gondwana. Early Jurassic (170-150Ma) rifting between West and East Gondwana is proposed to have created weaknesses in the crust along the Southern African margin in a NNE-SSW orientation leading to the development of small rift basins and the deposition of syn-rift …

    cape-town Repository record

  6. Buffalo Canyon: An Oligocene Greisen-Like Intrusion-Related Gold Deposit in the Union Mining District, Nye County, Nevada

    Quillen, Patrick2017

    … in Nevada. One occurrence in Nevada is the Jurassic Bald Mountain deposit in eastern Nevada; however, for most Nevada occurrences there has been insufficient work that establishes a genetic connection to intrusions or determines their age. Buffalo Canyon is a gold prospect located near the …

    unr Repository record