Mt. St. Helens/cc-Snyder-Pasture-Forest_tif.jpg

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Farther from the volcano, the eruption left only several inches of ash covering the ground. In this tephra-fall zone, most mammals, birds, and large trees survived, but most ground vegetation, insects, and other small organisms were smothered by the ash (photo by Charlie Crisafulli).

Farther from the volcano, the eruption left only several inches of ash covering the ground. In this tephra-fall zone, most mammals, birds, and large trees survived, but most ground vegetation, insects, and other small organisms were smothered by the ash (photo by Charlie Crisafulli).