National Parks and Monuments in Northwest US
Mount St Helens
 |
The material that was in the big empty space at the top of the mountain is what blew into the air when the volcano erupted.
Mount St Helens National Monument, Washington
Mount St Helens
|
The material that was in the big empty space at the top of the mountain is what blew into the air when the volcano erupted.
Mount St Helens National Monument, Washington
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