


1) The largest landslide in recorded history swept down the mountain at speeds of 70 to 150 miles per hour and buried the North Fork of the Toutle River under an average of 150 feet of debris.
2) Some areas are covered by as much as 600 feet.
3)The massive ash cloud grew to 80,000 feet in 15 minutes and reached the east coast in 3 days. Although most of the ash fell within 300 miles of the mountain finer ash circled the earth in 15 days and may continue to stay in the atmosphere for many years.
1) Delpha Carnine Barstow http://www.olywa.net/radu/valerie/StHelens.html 10/10/01
2) http://volcano.und.nodak.edu/vwdocs/msh/msh.html
3) "Mount St. Helens." Pics4Learning. October 2001. http://pics.tech4learning.com.

Created by: Matt
Date Created: October 8, 2001
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