USGS/Cascades Volcano Observatory, Vancouver, Washington

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Mount St. Helens, Washington
Petrologic Monitoring
2004 to 2006

Current Eruption HomePage CVO HomePage Mount St. Helens HomePage Current Update University of Washington Webicorders Eruption Highlights Eruption Chronology Photo Gallery USFS VolcanoCam	Photo Archives - Ash Collection Petrology Spider ... East Crater Glacier ... in the Snow ... October ... Ash Closeup ... Photo Archives - Collecting Dome Rocks Jaws II ... Animated GIF ... Trash Can Sampler ... Dome Rock Thin Sections comparing 1986 to November 2004 Dome Rock Comparison from 1986 to 2004 Thin section comparison of 1986 Augite-Hornblende-Hypersthene Dacite with 2004 Hypersthene-Hornblende Dacite (collected November 4, 2004).

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URL for CVO HomePage is: <http://vulcan.wr.usgs.gov/home.html>
URL for this page is: <http://vulcan.wr.usgs.gov/Volcanoes/MSH/Eruption04/Petrology/framework.html>
If you have questions or comments please contact: <GS-CVO-WEB@usgs.gov>
01/03/06, Lyn Topinka