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Volcanoes are a natural part of our Pacific Northwest existence – if you lived here during the eruption of Mount St. Helens in 1980, you know that all too well. But even if you weren't here during the ...

Volcanic cones are among the simplest volcano formations. They are built by fragments (called ejecta) thrown up (ejected) from a volcanic vent, piling up around the vent in the shape of a cone with a ...