Oligocene

Oligocene

End: 
23.03mya
Start: 
65.50mya

Oligocene

End: 
23.03mya
Start: 
65.50mya

Chattian

End: 
23.03mya
Start: 
28.40mya
Synonyms: 
Arikareean
Arvernian
Tabenbulukian

Rupelian

End: 
28.40mya
Start: 
33.90mya
Synonyms: 
Orellan
Whitneyan
Arirareean
Suevian
Hsandgolian
Tingirirican
Deseadan
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith