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    Late Pleistocene
    Middle Pleistocene
   Late Cretaceous
   Early Cretaceous
   Late Jurassic
   Middle Jurassic
   Early Jurassic
   Late Triassic
   Middle Triassic
   Early Triassic
   Late Devonian
   Middle Devonian
   Early Devonian
   Late Ordovician
   Middle Ordovician
   Early Ordovician
    Cambrian Stage 10
   Cambrian Series 3
    Cambrian Stage 5
   Cambrian Series 2
    Cambrian Stage 4
    Cambrian Stage 3
    Cambrian Stage 2
  Early Imbrian
  Basin Groups
Hierarchy:Precambrian Proterozoic  Mesoproterozoic
Classification:Period (as per International Commission on Stratigraphy)
Top:1200 Ma
Base:1400 Ma
FGDC code:~
GSSP:Defined chronometrically
Platform covers continue to expand. Green algae colonies in the seas. Grenville Orogeny in North America.

Geologic Events

Event NameTypeAgeArea
First sexual reproduction (concludes)Evolutionary event~1200 MaGlobal
Grenville orogeny (begins)Orogeny1250 - 980 MaNorthern America, Scotland
Sveconorwegian orogeny (concludes)Orogeny~1250 - ~900 MaEurope
Rodinia assembly (concludes)Continental Assembly~1300 - ~900 MaGlobal
Ur joins Rodinia (ongoing)Continental Assembly~1300 - 1071 MaGlobal
Kibaran orogeny (begins)Orogeny1400 - 1000 MaMid to Southern Africa
Columbia (Nuna) supercontinent breakup (concludes)Continental Breakup1425 ± 75 - 1250 ± 50 MaGlobal
Great Oxygenation Event (concludes)Major Climatic Event~3500 - ~850 MaGlobal

Overview of geological time

List all geological events
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