I would like to draw your attention to a pre-IAVCEI 2017 field trip in the Ohanapecosh Fm, WA. The field area is a few hours from Portland, and we will visit well-preserved Tertiary subaqueous volcaniclastic successions. The field trip is partly in Mt Rainier National Park, and offers beautiful views over several Quaternary volcanoes. More info below, and here: http://iavcei2017.org/ft
The lacustrine volcaniclastic deposits of the Ohanapecosh Formation, Washington
This 4-day field trip (10-13 August 2017) will cover the classic Tertiary Ohanapecosh Formation only a few hours drive from Portland at the foot of Mt Rainier and in the Cascades foothills. The Ohanapecosh Formation comprises a wide variety of volcaniclastic facies deposited in subaqueous settings but sourced mainly from subaerial explosive eruptions. We will examine fine to coarse units deposited from density currents associated with large-scale and small pyroclastic flows entering water, post-eruptive resedimentation, and fallout onto water. The succession is also highly instructive on the textural modification that accompanies diagenesis of volcaniclastic aggregates. One and a half days will be on road cut exposures within or close to the Mt Rainier National Park, whereas one day will consist of a hike (7 km return at ~2000 m elevation) to reach superb exposures with magnificent views of several Quaternary volcanoes. Return to Portland will include stops in the brewing area of the Yakima Valley, and scenic drive along the Columbia River Gorge and its famous basalts. This field trip is open to anybody interested in volcaniclastic sedimentation; we seek attendance from students to highly experienced researchers.
Martin Jutzeler, University of Tasmania, Australia
Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI).
ASU - http://www.asu.edu/ PSU - http://pdx.edu/ GVP - http://www.volcano.si.edu/ IAVCEI - http://www.iavcei.org/
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