Sökning: "Silurian"

Visar resultat 11 - 15 av 37 uppsatser innehållade ordet Silurian.

  1. 11. Diversity and Evolution of Silurian Radiolarians

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Martin Tetard; [2016]
    Nyckelord :Radiolaria; Silurian; Canadian Arctic; Paleobiodiversity; Diversity trends; CT-Scan; Radiolaria; silur; diversitetsmönster; kanadensiska Arktis;

    Sammanfattning : The three approaches followed herein aim to improve our understanding of the paleobiodiversity andevolution of Silurian radiolarians. The first approach provides an exhaustive taxonomic description ofan entirely new radiolarian fauna recovered from two sections of the Cape Phillips Formation in theCanadian Arctic which accumulated in two different paleoenvironmental settings. LÄS MER

  3. 12. The Primitive Antiarch Yunnanolepis from China : A Microtomographic Study

    Kandidat-uppsats, Uppsala universitet/Paleobiologi

    Författare :Jessica Grahn; [2016]
    Nyckelord :placodermi; microtomography; 3D model; mikrotomografi; 3D-modell;

    Sammanfattning : Placoderms appeared in the Silurian period and rapidly evolved and dominated the waters during the Devonian period. Among the earliest of the placoderms are yunnanolepids, a primitive form of antiarch from the Early Devonian of China and Vietnam. LÄS MER

  4. 13. A contribution to the knowledge of Fårö’s hydrogeology

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Henric Thulin Olander; [2015]
    Nyckelord :Fårö; Gotland; groundwater; water supply; Silurian; hydrogeology; SkyTEM; RMT; geophysics; Earth and Environmental Sciences;

    Sammanfattning : Fårö, Sweden´s ninth largest island, is suffering from poor groundwater management. A rampant development within tourism on Fårö to uphold its socioeconomic status has led to insufficient water quality and quantity in the municipal water supply. LÄS MER

  5. 14. A Multi-Evidence Approach to the Affinity of Tylodus deltoides Rohon 1893

    Master-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Thomas Claybourn; [2015]
    Nyckelord :3D virtual palaeohistology; evolution; Silurian; Gnathostomata; Holocephali; Ohesaare; 3D-virtuell paleohistologi; evolution; Silur; Gnathostomata; Holocephali; Ohesaare;

    Sammanfattning : Early gnathostome evolution has recently undergone revision due to newly published phylogenies. Within this new framework, early gnathostomes in the fossil record can be revised, particularly the subject of this paper Tylodus deltoides (Rohon, 1893), vertebrate microremains from the Silurian Ohesaare Formation of Estonia. LÄS MER

  7. 15. The fossil wonders of the Silurian Eramosa Lagerstätte of Canada : the jawed polychaete faunas

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Jesper Härling; [2012]
    Nyckelord :scolecodonter; polychaeter; silur; palaeobiogeography; palaeoecology; Silurian; Eramosa Lagerstätte; scolecodonts; polychaete faunas; paleoekologi; paleobiogeografi.; Earth and Environmental Sciences;

    Sammanfattning : The Silurian Eramosa Lagerstätte in Ontario, Canada, is represented by three distinguished biotas (1 to 3) with exceptionally well preserved fossils. In this study, the jawed polychaete fauna is described and discussed for the first time, on the basis of scolecodonts and jaw apparatuses, recovered from Biota 1 and 3. LÄS MER