Volcanismes that was active in the Tertiary period (65 million years ago to 1.8 million years ago). The Tertiary is increasingly a deprecated term, having been more recently split by scientists into the Paleogene period with the two most recent epochs reallotted to the Neogene period, but the Tertiary is still used occasionally especially in older vulcanology texts, sometimes without specifying the epoch or time span.
- Preceded by Category:Cretaceous volcanism in Category:Mesozoic volcanism.
- Succeeded by Category:Quaternary volcanism, starting with Category:Pleistocene volcanism.
This category has the following 6 subcategories, out of 6 total.