Sökning: "oncoids"
Hittade 3 uppsatser innehållade ordet oncoids.
1. Record of the end-Triassic mass extinction in shallow marine carbonates: the Lorüns section (Austria)
Master-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : The end-Triassic mass extinction (ETE) was one of the five big mass extinctions of the Phanerozoic and occurred ~201 Ma ago. Research agrees that the main triggering factor for the ETE was the eruptions of the Central Atlantic Magmatic Volcanic Province (CAMP), linked to the break-up of the supercontinent Pangaea. LÄS MER
2. Sedimentary Factories and Ecosystem Change in the Triassic-Jurassic Boundary Interval : Insights from the Skåne Area (Southern Sweden)
Master-uppsats, Uppsala universitet/PaleobiologiSammanfattning : The End-Triassic Extinction (ETE) has long remained one of the lesser known among the so-called “Big Five”. There exist several hypotheses regarding the probable cause of this extinction, which can mainly be divided into events of a decline in the rate of diversification in the late Triassic contra a sudden and significant extinction event. LÄS MER
3. An interpretation of oncoid mass-occurrence during the Late Silurian Lau Event, Gotland, Sweden
Kandidat-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : 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