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Canadian Cascade Volcanism: Subglacial to Explosive Volcanism in the Sea to Sky Corridor, B.C. From: Dr. Graham Andrews <gandrews@xxxxxxxxxx>
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Hello, This email is to raise people's awareness of our forthcoming fieldtrip to Mount Meager and the Whistler corridor in the Garibaldi-Cascade arc in southwest British Columbia. The trip will be run by Kelly Russell (UBC) and Cathie Hickson (Geol. Surv. Canada); and is one of several volcanological fieldtrips being run in conjunction with the GSA Cordilleran Section Meeting at Western Washington University, Bellingham, WA. The trip will run from **May 6th to May 8th**, departing from and returning to Bellingham. Participants must have suitable documentation (passports, visas, etc) to enter Canada. Please register at the Meeting website: http://www.geosociety.org/sectdiv/cord/07cdmtg.htm ABSTRACT Here we describe a two-day field trip to examine Quaternary volcanism in the Canadian Cascade arc, named the Garibaldi Volcanic Belt (GVB). Day 1 of the trip proceeds along the Whistler corridor from Squamish to Pemberton and focuses on Quaternary glaciovolcanic deposits. Interactions between volcanoes and ice in the GVB have been common during the past two million years and this has resulted in a diverse array of landforms including: subglacial domes, tuyas, impounded lava masses, and sinuous lavas that exploited within-ice drainage systems. On Day 2, the trip heads northwest of Pemberton, British Columbia along logging roads to see deposits from the 2360 BP eruption of the Mount Meager volcanic complex. This eruption began Plinian-style, generating pyroclastic fall and flow deposits and ended with the production of block and ash pyroclastic flows by explosive (Vulcanian) collapse of lava domes (e.g., Soufriere Hills). Many of the traits of the deposits seen on this two day trip are a reflection of, both, the style of eruption and the nature of the surrounding landscape. In this regard, the trip provides a spectacular window into the nature and hazards of effusive and explosive volcanism occurring in mountainous terrains and the role of water and ice. Thanks Graham ------------------------------------- Dr. Graham Andrews Volcanology Lab & MDRU EOS East 160B University of British Columbia Vancouver BC Canada gandrews@xxxxxxxxxx http://www.eos.ubc.ca/about/researcher/G.Andrews.html
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