Sökning: "Late Silurian"

Visar resultat 1 - 5 av 14 uppsatser innehållade orden Late Silurian.

  1. 1. Stratigraphy, sedimentology and geophysical assessment of the early Silurian Halla and Klinteberg formations, Altajme core, Gotland, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Christopher Artursson; [2018]
    Nyckelord :Gotland; gamma ray; stratigraphy; carbonate sedimentology; drill core; Altajme; Ala-Fjäle; Klinteberg Formation; geophysical survey; Earth and Environmental Sciences;

    Sammanfattning : The Altajme drillcore was recovered from near Buttle in central Gotland in 2015. The core was drilled in outcrop belt of the late Wenlock (Silurian) Klinteberg Formation as a result from an international drilling campaign between the Department of Geology at Lund University and Iowa University, USA. LÄS MER

  3. 2. A geophysical survey (TEM; ERT) of the Punata alluvial fan, Bolivia

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Joakim Mårdh; [2017]
    Nyckelord :electromagnetic; geophysics; TEM; Punata; alluvial fan; Earth and Environmental Sciences;

    Sammanfattning : The Punata alluvial fan, situated in central Bolivia (Valle Alto) between the Altiplano and the lowlands, is an important aquifer for the local rural population. Due to rapid development and population growth in the area, the demand for fresh water has increased in recent year. LÄS MER

  4. 3. An interpretation of oncoid mass-occurrence during the Late Silurian Lau Event, Gotland, Sweden

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Martin Qvarnström; [2012]
    Nyckelord :Bjärsjölagård; Gotland; microbialites; Silurian; Oncoids; Lau Event; ecological crisis; Onkoider; Silur; microbialiter; ekologisk kris; Earth and Environmental Sciences;

    Sammanfattning : The geological significance of the microbial-formed oncoid is not as well understood as the recognized, analogous stromatolite but can, as well be used as an environmental indicator. In association with the larger Phanerozoic mass extinctions, a resurgence of microbialites as a disaster fauna is at present an accepted view. LÄS MER

  5. 4. Stratigraphy, facies and depositional history of the Colonus Shale Trough, Skåne, southern Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Magnus Eriksson; [2012]
    Nyckelord :Sweden; tec-tonic subsidence; gamma ray; backstripping; Lower Palaeozoic; Colonus Shale Trough; Sorgenfrei-Tornquist Zone; Colonustråget; Sorgenfrei-Tornquistzonen; underpaleozoikum; tektonisk subsidens; Sverige; Earth and Environmental Sciences;

    Sammanfattning : Colonustråget är en viktig tektonisk enhet i den s.k. Sorgenfrei-Tornquistzonen i Skåne, södra Sverige. Den sedimentära sekvensen består av en kambrisk till silurisk succession dominerad av finkorniga klas-tiska sediment samt en mindre del kalksten. LÄS MER

  7. 5. Carbon isotope chemostratigraphy of the Late Silurian Lau Event, Gotland, Sweden

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Hani Younes; [2012]
    Nyckelord :high-resolution correlation; conodonts; carbon isotope excursion; Gotland; extinction; Silurian; Lau Event; microbial resurgence; Earth and Environmental Sciences;

    Sammanfattning : The positive δ13C excursion associated with the Late Silurian Lau Event (approximately 420 Ma) is recognized globally and considered to be one of the most prominent carbon isotope excursions of the Phanerozoic. Its maximum values are exceeded only by values from the Proterozoic. LÄS MER