Statherian Period
Rise of complex, single-celled life
The Statherian is the fourth and final period of the Paleoproterozoic Era, occurring after the Orosirian, and before Calymmian (Mesoproterozoic)
Geological Age
1,800–1,600 Ma
The name is derived from the Greek word meaning "stable" or "firm"; previous eras characterized by violent events.
Eon
Era
What happened during this time?
Geological
The super-continent Columbia formed during this period.
Continents of Ur, Nena, and Atlantica drifted together, they expanded through accretion and formed a huge super continent
Biological
Diversification of unicellular organisms
Appearance of possible early eukaryote (Grypania spiralis) around 2.1 Ga (Grey and Williams 1990; Han and Runnegar 1992; Kumar 1995)
The youngest occurrence of Grypania is in the Ediacaran Period (900 Ma)
The organisms has a coiled, filamentous appearance; possible green, Chlorophyceae algae
Grypania could also be giant bacterium or bacterial super colony, similar to Thiomargarita magnifica, a megabacterium found in the Caribbean mangroves that can reach up to 2 cm (Volland et al. 2022)
Above: An early eukaryotic algae, Grypania