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Supervolcano Yellowstone....

OK, I did find this from Wikipedia:

"A pyroclastic flow (also known scientifically as a pyroclastic density current[1]) is a fast-moving current of hot gas and rock (collectively known as tephra), which reaches speeds moving away from a volcano of up to 700 km/h (450 mph)"

Good grief! Can you say "flash broiled".
 
How?

I know volcanic ash is essentially powered glass, but how would it kill us?

OK, I did find this from Wikipedia:

"A pyroclastic flow (also known scientifically as a pyroclastic density current[1]) is a fast-moving current of hot gas and rock (collectively known as tephra), which reaches speeds moving away from a volcano of up to 700 km/h (450 mph)"

Good grief!

This^^^ And if not, suffocation.
 
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