Tonian period

1000 - 720 Ma

The definition of this interval in the timescale International Chronostratigraphic Timescale is taken from the following source:

  • K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are intervals in 1 timescales which overlap this one. show

This interval is used in the definition of 120 collections

A total of 145 collections with 844 occurrences lie within this time span

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International Chronostratigraphic Timescale
ProterozoicNeoproterozoicEdiacaran538.8
Cryogenian635
Tonian720
MesoproterozoicStenian1000
Ectasian1200
Calymmian1400
PaleoproterozoicStatherian1600
Orosirian1800
Rhyacian2050
Siderian2300
2500