1,900 million years ago

by Smith609, design adapted from Luxo's

on the international stratigraphic timescale 
WhenProterozoic eon, Neoproterozoic era, Tonian period
— to —
Phanerozoic eon, Cenozoic era, Quaternary period, Pleistocene subperiod, Calabrian epoch
Timeline
Compiled using data from the International Commission on Stratigraphy. Discuss this implementation by Martin R. Smith at Wikipedia or GitHub.
This visualization of the geological timescale is licensed under a Creative Commons Attribution-Share Alike 4.0 Unported License. Creative Commons License.