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Cryogenian

Hierarchy:Precambrian Proterozoic  Neoproterozoic
   Cryogenian
Classification:Period (as per International Commission on Stratigraphy)
Top:~635 Ma
Base:720 Ma
Preceeds:Ediacaran
Follows:Tonian
GSSP:Defined chronometrically; but will be replaced by GSSP. First glacial episode occurred after 750 Ma
Possible "Snowball Earth" period. Fossils still rare. Rodinia landmass begins to break up. Late Ruker / Nimrod Orogeny in Antarctica tapers off.
 

Geologic Events

Event NameTypeAgeArea
Marinoan glaciation ("Snowball earth") (concludes)Glaciation Event~650 - ~635 MaGlobal
Cadomian orogeny (concludes)Orogeny~660 - ~540 MaEurope
Sturtian glaciationGlaciation Event717.4 ± 0.1 - ~660 MaGlobal
Rodinia breakup (ongoing)Continental Breakup750 - 633 MaGlobal
Pannotia supercontinent (ongoing)Supercontinent750 - 530 MaGlobal
Pan-African orogeny (concludes)Orogeny~870 - ~550 MaAfrica


Overview of geological time

List all geological events
Mineral and/or Locality  
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