Mount St. Helens - Wikipedia, the free encyclopedia
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Saved by 1 people (-1 private), first by anonymouse user on 2006-03-02
- Whiteknoll on 2008-01-14 - Tags fifthgrade , science , volcano
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| map | #26 USGS Mount St. Helens |
| Type | #21 Active stratovolcano |
| Volcanic arc / belt | Cascade Volcanic Arc |
| Age of rock | < #20 40,000 yrs |
| Last eruption | #19 2004–2008 (ongoing) |
| First ascent | #18 1853 by Thomas J. Dryer |
| Easiest route | #17 Hike via south slope of volcano (closest area near eruption site) |
#1 Mount St. Helens is an active stratovolcano located in Skamania County , Washington , in the Pacific Northwest region of the United States . #2 It is 96 miles (154 km) south of Seattle and 53 miles (85 km) northeast of Portland, Oregon . #12 Mount St. Helens takes its English name from the British diplomat Lord St Helens , a friend of explorer George Vancouver who made a survey of the area in the late 18th century. #3 The mountain is located in the Cascade Range and is part of the Cascade Volcanic Arc , a segment of the Pacific Ring of Fire that includes over 160 active volcanoes . #10 This volcano is well known for its ash explosions and pyroclastic flows .
#4 Mount St. Helens is most famous for its
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