Proterozoic
= Proterozoic
{c}
{wiki}
The geological eon between the <Archean> and <Phanerozoic>, from about 2.5 billion to 539 million years ago.
= Proterozoic
{c}
{wiki}
The geological eon between the <Archean> and <Phanerozoic>, from about 2.5 billion to 539 million years ago.