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Mount Hood, the nearest major volcanic peak in Oregon, is 60 miles (100 km) southeast of Mount St. Helens. Mount St. Helens is geologically young compared with the other major Cascade volcanoes. It formed only within the past 40,000 years, and the summit cone present before its 1980 eruption began rising about 2,200 years ago. [ 11 ]
Topographic map(OTM) Cross-wiki upload from en.wikipedia.org: File usage. The following page uses this file: 1980 eruption of Mount St. Helens; Global file usage.
Topographic map(OTM) Cross-wiki upload from en.wikipedia.org: File usage. The following page uses this file: 1980 eruption of Mount St. Helens; Metadata.
[2] [4] It is located on the boundary shared by Mount St. Helens National Volcanic Monument and Gifford Pinchot National Forest. Castle Peak is part of the Cascade Range, and it is situated one mile (1.6 km) west of Castle Lake. Topographic relief is significant as
The Dome is a 5,720+ ft (1,740+ m) mountain summit located in Mount St. Helens National Volcanic Monument, in the Gifford Pinchot National Forest, in Skamania County of southwest Washington state. [3] It is situated in the Cascade Range, less than 2 mi (3.2 km) north of Spirit Lake, and 1.28 mi (2.06 km) northeast of Coldwater Peak.
A conifer forest will return to Mount St. Helens in its own time. On a debris-avalanche deposit totally devoid of life after May 18, 1980, plants are slowly taking hold of the landscape.
Mount Hood, in fact, was designated by Kelley to be renamed after President John Adams and St. Helens was to be renamed after George Washington. In a mistake or deliberate change by mapmaker and proponent of the Kelley plan, Thomas J. Farnham, the names for Hood and St. Helens were interchanged.
Then, on May 18, 1980, the dramatic eruption of Mount St. Helens shattered the quiet and brought the world's attention to the range. Geologists were also concerned that the St. Helens eruption was a sign that long-dormant Cascade volcanoes might become active once more, as in the period from 1800 to 1857 when a total of eight erupted.