Collaboration between Oregon State University and IRIS
The Pacific Northwest is a volcanological wonderland. The western margin of North America has long been dominated by subduction and dextral transtension. Ocean-ridge rifting produces submarine volcanism offshore. Subduction of the young Juan de Fuca Plate creates the arc of Cascades volcanoes. Hot-spot volcanism drives the Yellowstone caldera system. Continental extension of the Basin and Range province, plus a northward migrating triple junction add to a complex volcanic history. (Created for a Plenary talk by Dr. Anita Grunder at the 2017 IAVCEI meeting in Portland, OR.)
Using map view in concert with cross sections, this animation steps the viewer through both volcanic and simplified tetonic processes.
CLOSED CAPTIONING: A .srt file is included with the download. Use an appropriate media player to utilize captioning.
Tectonics of the Pacific Northest yield:
- Active ocean-ridge volcanoes
- Cascades Arc of subduction related volcanism
- Back-arc volcanoes
- Yellowstone Hotspot
- Basin and Range lava fields