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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
Fossil Record

Data via PaleoBioDB


Taxa Count Key
First appearance
Extinction
First appearance and extinction
Related precursors
KingdomPhylumClassTaxa Count
BacteriaCyanobacteria Cyanophyceae1
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
 
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