Mid-Tertiary ignimbrite flare-up

Mid-Tertiary ignimbrite flare-up
Wheeler Geologic Area, rocks of the San Luis Caldera complex
VolcanoMultiple cumulative events
Date25-40 million years ago
LocationWestern United States
ImpactDeposited 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.

  1. ^ Ogg, James G.; Gradstein, F. M; Gradstein, Felix M. (2004). A geologic time scale 2004. Cambridge, UK: Cambridge University Press. ISBN 0-521-78142-6.
  2. ^ Cannon, Eric. "The Mid-Tertiary ignimbrite flare-up". Archived from the original on 16 July 2012. Retrieved 14 August 2010.


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