It spans for the time of appearance of oxygenin Earth’s atmosphere to just before the proliferation of complex life (such as corals) on the Earth.
Bacteriabegin producing oxygen, leading to the sudden rise of life forms.
Eukaryotes (have a nucleus), emerge, including some forms of soft-bodied multicellular
Earlier forms of fungi formed around this time.
The early and late phases of this eon may have undergone Snowball Earthperiods (the planet suffered below-zero temperatures, extensive glaciation and as a result drop in sea levels).
It was a very tectonically activeperiod in the Earth’s history.
It featured the first definitive supercontinent cycles and modern orogeny (mountain building).
It is believed that 43% of modern continental crust was formed in the Proterozoic, 39% formed in the Archean, and only 18% in the Phanerozoic.
In the late Proterozoic (most recent), the dominant supercontinent was Rodinia (~1000–750 Ma).
