Category:Volcanic ash distribution maps re. volcanic eruptions in the United States
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Media in category "Volcanic ash distribution maps re. volcanic eruptions in the United States"
The following 3 files are in this category, out of 3 total.
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1980 Mount st helens ash distribution.svg 884 × 569; 104 KB
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Bridge River Ash map.png 648 × 380; 511 KB