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What type of plate boundary in mt st helens when it erupted in 1980?
Wiki User
∙ 14y ago
The Cascade Mountains in Oregon and Washington (including Mount St. Helens) are created by the subduction of the Juan de Fuca plate under the North American Continental Plate.
See Wikipedia:
http://en.wikipedia.org/wiki/Juan_de_Fuca_Plate
http://en.wikipedia.org/wiki/Cascade_Volcanoes
Essentially all of the volcanoes in the Cascade Range are still considered active. Mt St. Helens is considered the most active with the large eruption in 1980, followed by numerous small "cone building" eruptions.
The Three Sisters have had major lava flows every few thousand years, and Mt. Mazama had a major eruption about 7,000 years ago followed by numerous small cone-building eruptions. They could all have future eruptions.
The following images are from the above Wikipedia Article, and were originally produced by the USGS and entered into the public domain.
Wiki User
∙ 14y ago
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What volcano erupted in 1970?
Mount St. Helens famously erupted on May 18 1980.
What years did st helens erupt?
It erupted in the year of 1980.
What Volcano erupted in 1980?
Many volcanoes erupted in the 1980s. Most notable are the eruptions of Mount St. Helens Washington state in 1980, El Chichon in Mexico in 1982, and Nevado del Ruiz in Columbia in 1985.
Which mountain erupted May 18 1980?
Mount Saint Helens.
What year did Mount St. Helens erupt?
Mount St. Helens famously erupted on May 18, 1980. Smaller eruptions ocurred from 1980 to 1986, 1989 to 1991, and a few times from 2004 to 2008.
What happened in 1980?
Mt st helens erupted
What volcano erupted in 1970?
Mount St. Helens famously erupted on May 18 1980.
What volcanoe erupted in the U.S in 1980?
Mount St. Helens
What US volcano erupted in 1980?
Mount St. Helens
What years did st helens erupt?
It erupted in the year of 1980.
What is the volcano that erupted in the state of Washington in 1980?
mount st Helens
What Volcano erupted in 1980?
Many volcanoes erupted in the 1980s. Most notable are the eruptions of Mount St. Helens Washington state in 1980, El Chichon in Mexico in 1982, and Nevado del Ruiz in Columbia in 1985.
Which mountain erupted in 1980 in Washington United states?
Mt Helens
Which mountain erupted May 18 1980?
Mount Saint Helens.
What year did Mount St. Helens erupt?
Mount St. Helens famously erupted on May 18, 1980. Smaller eruptions ocurred from 1980 to 1986, 1989 to 1991, and a few times from 2004 to 2008.
When was the first eruption of mt st helens?
Mt St Helens first erupted on May 18, 1980
What erupted in the us in the 1980s?
Mt. St. Helens erupted in the U.S. in 1980 killing over fifty people.
