Proterozoicum
Proterozoicum est aeon et aeonothema quod abhinc circa 2 500 milliones annorum coepit et abhinc 542 milliones annorum finem habuit.

Notae

Bibliographia 
 John Parnell, Connor Brolly, "Increased biomass and carbon burial 2 billion years ago triggered mountain building" in Communications Earth & Environment vol. 2 no. 238 (2021)

Nexus externi 
 De Proterozoico 

Aeva geologica
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Aeones