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  • explosive eruption of Mount St. Helens was preceded by the eruption of Lassen Peak, one of the three Cascade Volcanoes in northern California. On May 22, 1915
    19 KB (2,811 words) - 21:08, 14 April 2016
  • northern California. The Cascades volcanoes are active and include Mount Saint Helens, which had a large eruption in 1980. Mount Lassen, Mount Shasta, and
    24 KB (3,583 words) - 17:55, 26 February 2015
  • plate (Figure 6.18). The volcanoes of northeastern California—Lassen Peak, Mount Shasta, and Medicine Lake volcano—along with the rest of the Cascade
    26 KB (3,511 words) - 16:14, 25 December 2015