#paleoproterozoic
Paleoproterozoic
First era of the Proterozoic Eon
The Paleoproterozoic Era is the first of the three sub-divisions (eras) of the Proterozoic eon, and also the longest era of the Earth's geological history, spanning from 2,500 to 1,600 million years ago (2.5–1.6 Ga). It is further subdivided into four geologic periods, namely the Siderian, Rhyacian, Orosirian and Statherian.
Mon 8th
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