TY - RPRT TI - Plagioclase populations and zoning in dacite of the 2004-2005 Mount St. Helens eruption: Constraints for magma origin and dynamics AU - Martin J. Streck AU - Cindy A. Broderick AU - Carl R. Thronber AU - Michael A. Clynne AU - John S. Pallister PY - 2008 DO - 10.3133/pp175034 UR - https://pubs.usgs.gov/publication/pp175034 ID - pp175034 ER -