A new look at “old” tuffs from Newberry Volcano: Evidence for dynamic magmatic processes at a geologic crossroads in central Oregon

  • 23 Apr 2019
  • 7:00 PM
  • Deschutes Brewery Mountain Room

Jeff Templeton

Western Oregon University

5:30 pm social hour

7:00 pm presentation

This talk will focus on ash-flow tuffs that shed light on the earliest
caldera-forming eruption at Newberry Volcano, which is located at the
west end of the High Lava Plains about 60 km east of the Cascades.
Geochemical data reveal a dynamic scenario involving injection of basalt
into a rhyolitic magma body and mixing to yield subsequently erupted
dacitic tuffs. Further, these data show that both Cascadia subduction
and the High Lava Plains influenced silicic magmatism at Newberry.

Central Oregon Geoscience Society

Email: COGeoSoc@gmail.com
P.O. Box 2154,  Bend, Oregon 97709

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