A filmstrip documentary produced in 1980 by Educational Images, Ltd. on the 1980 eruption of Mount St. Helens.
From the VHS box: "The geologic history of the region serves to introduce and explain the explosion of Mount St. Helens. Details the overwhelming destruction, the blowdowns, and mudflows. In particular shows destructive effects to the Columbia River and Spirit Lake."
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10 мар 2016