Science Source Feb 2010
EN_90286397_0244
![Science Source Feb 2010](img/medium/arch1/dvd0114/15/EN_90286397_0244.jpg)
The May 18, 1980 debris avalanche from Mount St. Helens covered over 24 square miles (62 square kilometers) of the upper Toutle River valley and blocked tributaries of the North Fork Toutle River. New lakes such as Castle Lake (pictured here) and Coldwater Lake were created. March 1984.
2010-02-13
EAST NEWS
Science Source
Science Source/USGS
bk3970
1,28MB
25cm x 17cm by 300dpi
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