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DTSTART;TZID=America/Los_Angeles:20251117T190000
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CREATED:20251027T023810Z
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UID:40899-1763406000-1763411400@iafi.org
SUMMARY:Puget Lobe Lecture: Jeff Tepper on the Initiation of the Cascade Arc
DESCRIPTION:  \n  \n            Dr. Jeff Tepper\nThe Cascade volcanic chain\, the world’s youngest continental arc\, was “born” shortly after accretion of the  Siletzia oceanic terrane ~50 My ago.   That collision\, which led to formation of the Olympics\, terminated the  earlier subduction system and caused a portion of the subducting Farallon slab to break off.  When Cascade  magmatism began less than 5 My later\, there was a new trench located outboard of Siletzia.  In this talk I will  present a new model\, based on petrology\, geochronology\, plate motion reconstructions\, and mantle tomography\,  that explains how subduction was initiated so quickly and in a setting where the slab was young and hot and in  theory too buoyant to subduct.  \n 
URL:https://iafi.org/event/puget-lobe-lecture-jeff-tepper-on-the-initiation-of-the-cascade-arc/
LOCATION:Bellevue College Building T Room 117\, 3000 Landerholm Cir SE\, Bellevue\, WA\, 98007\, United States
CATEGORIES:Lecture,Meeting,Puget Lobe
ORGANIZER;CN="Puget Lobe Chapter":MAILTO:pugetlobe@iafi.org
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