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