What plates are mt st helens on?

Answer 1

It is the Juan de Fuca plate, Pacific and the North America plates. The Juan de Fuca plate went under the North American plate and is melted into material in the mantle. This is called a destructive plate margin. This material then comes up through the volcano, and solidifies, making a cone shaped volcano. It often blocks itself up with residue magma, so eruptions are violent as much builds up. This happened with Mount St. Helens.

Answer 2

the north american plate (continental therefore lighter and less dense but much thicker) and the juan de fuca plate (oceanic therefore heavier denser and thinner).

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Answer 3

== == Answer #1 by Ginezumi The names of the two plates are the Juan de Fuca and the North American. Answer #2

Answer 4

I think its like Juan de Fuga and the north American plates but i could be wrong. im not really sure bout da question

Answer 5

The Juan de Fuca plate, the Pacific Plate and the North American Plate.

Answer 6

The subduction of the Juan de Fuca plate below the North American plate created Mt. St. Helens.

Answer 7

Tectonic movement in the ocean or sfs sea-floor spreading, caused it

Answer 8

The Juan de Fuca PLate is subducting under the North American Plate.