"Ash-darkened east slopes as they appeared on March 30. This ash was derived entirely from rock pulverized by the explosively-expanding, high-temperature steam and other gases. No new rock material was produced during the stage of the eruption. Note that the location of the ash fall indicates the direction of the prevailing wind. Mount Rainier, another volcanic peak, is visible in the background." (U.S. Dept. Of Commerce, 1980, p. 3)

Image of Mount St. Helens showing an  ash-darkened east slope on March 30, 1980.
Ash-darkened east slope on March 30, 1980
Photo: Courtesy of NGDC/NOAA.

Button that takes you back to Volcanoes main page.


HTML code by Chris Kreger
Maintained by ETE Team
Last updated November 10, 2004

Some images 2004 www.clipart.com

Privacy Statement and Copyright 1997-2004 by Wheeling Jesuit University/NASA-supported Classroom of the Future. All rights reserved.

Center for Educational Technologies, Circuit Board/Apple graphic logo, and COTF Classroom of the Future logo are registered trademarks of Wheeling Jesuit University.