Sentences with phrase «volcanic debris deposited»
The massive volumes of volcanic debris deposited in the Spirit Lake and the Toutle River system during the 1980 eruption of Mount St. Helens in southwest Washington State drastically changed the region and left its 50,00... More >>
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ROUGH TERRAIN Underwater robots helped map Havre's 2012 eruption, creating elevation maps of the site and allowing researchers to figure out the volume of volcanic debris deposited there.