Chattian
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The Chattian (also known as Chickasawhayan or Late Oligocene) is the second and final of two stages of the Oligocene Epoch. It spans the time between 28.4 ± 0.1 Ma and 23.03 ± 0.05 Ma (million years ago).
During the Chattian the largest known single-event volcanic eruption occurred: the Fish Canyon eruption of La Garita with a magnitude of 9.2.[1] It has been dated to 27.51 Ma ago.[2]
[edit] References
- ^ Mason, Ben G.; Pyle, David M.; Oppenheimer, Clive (2004). "The size and frequency of the largest explosive eruptions on Earth". Bulletin of Volcanology 66 (8): 735–748. doi:.
- ^ Lanphere, Marvin A.; Baadsgaard, H. (2001). "Precise K–Ar, 40Ar/39Ar, Rb–Sr and U/Pb mineral ages from the 27.5 Ma Fish Canyon Tuff reference standard". Chemical Geology 175 (3–4): 653–671. doi:.
[edit] External links
| Paleogene period | ||
|---|---|---|
| Paleocene epoch | Eocene epoch | Oligocene epoch |
| Danian | Selandian Thanetian |
Ypresian | Lutetian Bartonian | Priabonian |
Rupelian | Chattian |
