Category:Pyroclastic flows at Mount St. Helens
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Media in category "Pyroclastic flows at Mount St. Helens"
The following 2 files are in this category, out of 2 total.
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092 MSH institute slide show028 (22049726911).jpg 1,066 × 800; 158 KB
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Mount St. Helens erupting blue.jpg 367 × 544; 236 KB