Neoproterozoic Era

The Neoproterozoic Era is a geological era stretching from 1000 to 541 million years ago. It is the final era of the Proterozoic. In the middle of the Neoproterozoic, the most severe glaciations on Earth, included the Marionan glaciation, occured. Towards the end, the Ediacaran biota flourished, marking the first fossil evidence of complex multicellular life.

Periods
The Neoproterozoic era is split into three periods
 * Tonian Period (1000 - 720 MYA)
 * Cryogenian Period (720 - 635 MYA)
 * Ediacaran Period (635 - 541 MYA)

Adjacent Eras
The Neoproterozoic Era was preceded by the Mesoproterozoic Era, and succeeded by the Paleozoic Era of the Phanerozoic Eon.