TY - RPRT TI - Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering AU - John S. Pallister AU - Carl R. Thornber AU - Katharine V. Cashman AU - Michael A. Clynne AU - Heather Lowers AU - Charlie Mandeville AU - Isabelle K. Brownfield AU - Gregory P. Meeker PY - 2008 DO - 10.3133/pp175030 UR - https://pubs.usgs.gov/publication/pp175030 ID - pp175030 ER -