Essays about: "Tonian"

Found 1 essay containing the word Tonian.

  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