:Category:Oligocene volcanoes
{{Commons category|Oligocene volcanoes}}
Volcanoes that were active in the Oligocene epoch (approximately 33,900,000 years to 23,000,000 years ago).
- Preceded by :Category:Eocene volcanoes.
- Succeeded by :Category:Miocene volcanoes in the Neogene (this) period.
Category:Volcanoes by geological epoch
{{see also|Wikipedia:WikiProject Geology|Wikipedia:WikiProject Volcanoes}}{{portal|Geology|Volcanoes}}