Volcanoes that were active in the Oligocene epoch (approximately 33,900,000 years to 23,000,000 years ago).
This category has the following 2 subcategories, out of 2 total.
The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes.
Volcanoes that were active in the Oligocene epoch (approximately 33,900,000 years to 23,000,000 years ago).
This category has the following 2 subcategories, out of 2 total.
The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes.