Mid-Tertiary ignimbrite flare-up | |
---|---|
Volcano | Multiple cumulative events |
Date | 25-40 million years ago |
Location | Western United States |
Impact | Deposited vast swatches of ignimbrite across the western United States |
The Mid-Tertiary ignimbrite flare-up,[a] was a dramatic period of volcanic eruptions in mid-Cenozoic time, approximately 25–40 million years ago, centered in the western United States.[2] These eruptions are seen today as deposits of ignimbrite, the pyroclastic material that was laid down from these eruptions.
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