Essays about: "stromatolites"

Found 2 essays containing the word stromatolites.

1. 1. Biodiversity of Organic-Walled Eukaryotic Microfossils from the Tonian Visingsö Group, Sweden

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Corentin Loron; [2016]
   Keywords : Organic-walled microfossils; Tonian; cyst; green algae; eukaryote; Visingsö Group; Mikrofossil med organiska cellväggar; tonian; cysta; grönalger; eukaryot; Visingsö gruppen;

   Abstract : The diversification of unicellular, auto- and heterotrophic protists and the appearance of multicellular microorganisms is recorded in numerous Tonian age successions worldwide, including the Visingsö Group in southern Sweden. The Tonian Period (1000-720 Ma) was a time of changes in the marine environments with increasing oxygenation and a high input of mineral nutrients from the weathering continental margins to shallow shelves, where marine life thrived. READ MORE

3. 2. Early life and its implications for astrobiology : a case study from Bitter Springs Chert, Australia

   University essay from Lunds universitet/Geologiska institutionen

   Author : Hanna Sigeman; [2013]
   Keywords : FTIR; XRF; SEM; microfossil; stromatolites; Amadeus Basin; Bitter Springs; origin of life; microorganisms; exobiology; early life; astrobiology; tidigt liv; astrobiologi; exobiologi; mikroorganismer; livets ursprung; stromatoliter; mikrofossil; Earth and Environmental Sciences;

   Abstract : Early life research faces additional challenges than those of the study of later life forms. Due to the de-materialization of the earliest rocks, valuable information about the early Earth is forever lost. Furthermore, early life was small and morphologically basic, effectuating abiotic pseudofossils to infiltrate the fossil record. READ MORE