Sökning: "Late Silurian"

Visar resultat 11 - 14 av 14 uppsatser innehållade orden Late Silurian.

  1. 11. Extinctions and faunal turnovers of early vertebrates during the Late Silurian Lau Event, Gotland, Sweden

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Eva K. Nilsson; [2005]
    Nyckelord :Lau Event; Late Silurian; Gotland; utdöenden; fjäll; vertebrater; Laukatastrofen; sensilur; early vertebrates; scales; extinctions; Earth and Environmental Sciences;

    Sammanfattning : The Late Silurian Lau Event is one of the three major events identified in the Gotland strata. It is associated with one of the largest stable carbon isotope excursion recorded in the Phanerozoic, as well as rapid lithology changes, and extinctions and faunal turnovers among various fossil groups. LÄS MER

  3. 12. The Late Silurian Lau Event and brachiopods from Gotland, Sweden

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Lena Gustavsson; [2005]
    Nyckelord :geography; geology; Late Silurian; Lau Event; brachiopods; Gotland; Sweden; Earth and Environmental Sciences;

    Sammanfattning : The impact of the Ludfordian Lau Primo-Secundo Event on brachiopods from Gotland has been investigated. About 12 000 individuals were identified from five samples. The results are supplemented by an extensive literature study. On Gotland, the Lau Event spans the Botvide Mbr (uppermost När Fm, upper Hemse Group) and the Eke Fm. LÄS MER

  4. 13. Early Ludlow (Silurian) graptolites from Skåne, southern Sweden

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Andreas Nilsson; [2003]
    Nyckelord :Colonus Shale; limestone; graptolites; Ludlow; colonusskiffer; kalksten; graptoliter; Skåne; Earth and Environmental Sciences;

    Sammanfattning : The Colonus Shale consists of light grey, greenish or bluish shale with some carbonate. At some localities mica and thin layers of grey limestone are also present. The Colonus Shale has an estimated thickness of 600-1100 m in Skåne. LÄS MER

  5. 14. Lower Silurian polychaetaspid and ramphoprionid polychaetes from Gotland : aspects on taxonomy and palaeoecology

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Mats Eriksson; [1996]
    Nyckelord :Annelida; polychaetes; polychaetaspids; ramphoprionids; scolecodonts; palaeoecology; taxonomy; Lusklint; Lickershamn 2; Lower Visby Beds; Upper Visby Beds; Högklint Beds; Wenlock; Llandovery; Silurian; Gotland; Sweden; Earth and Environmental Sciences;

    Sammanfattning : The Silurian strata of Gotland yield a wide variety of polychaete jaws. The investigated polychaetes include the family Polychaetaspidae with the two genera Polychaetaspis and Kozlowskiprion, and the monotypic family Ramphoprionidae with the genus Ramphoprion. LÄS MER