Sökning: "microbial resurgence"

Hittade 2 uppsatser innehållade orden microbial resurgence.

1. 1. 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

3. 2. 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