Krittida
Juratida
Karbontida
Permtida
Silur
Devontida
Trias
Kambrium
Ordovicium
Paleogen
Neogen
Ediacara
Kryogenium
Pennsylvaniatida
Siderium
Stenium
Tonium
Mississippitida
Orosirium
Statherium
Rhyacium
Calymmium
Ectasium
Tidleg_ordovicium
Tremadocium
Floium
Darriwilium
Hirnantium
Sein_ordovicium