Actually, the North American Plate and the Pacific plate form a transform boundary. There is no volcanism related with a transform boundary. Mt. Saint Helens was created by the interactions of the North American plate and the Juan de Fuca plate. The Juan de Fuca plate is an oceanic plate, made of material which is more dense than continental plates, such as the North American plate. The Juan de Fuca plate and the North American plate are currently smashing into each other, and Juan de Fuca plate is subducting (sinking below) because it is denser. this allows for magma to come to the surface, and creates a volcano.
Please disregard the first answer as it is complete and utter jank.
The plates converged and the event happened
The North American Plate and the Juan de Fuca plate.
Plate Movement
it never erupted, it was a lie.hope this helped :)
Plate tectonics
The cause of Mt. St. Helens' volcanism is due to the subduction melting of the Pacific Plate as it subducts under the North American Plate, located along a convergent plate boundary or fault. No, Mount Saint Helens is not on a hot spot, nor is it on a fault. Mount Saint Helens is part island arc volcanic chain (the Casade Mountaind) due to the subduction of the Pacific Plate under the North American Craton. NOTE: The Farallon Plate is no longer here; it ceased to exist with the end of the Laramide Orogeny some 30 million years ago. The remnants of the Farallon Plate are the Juan de Fuca Plate of British Columbia and northwestern Washington State, and the Cocos Plate of southwestern Mexico. Neither of these microplates has any effect on Mount Saint Helens, which is in southwestern Washington. I found this answer on answers.yahoo.com
Mount St. Helens was formed along a subduction zone, where the Juan de Fuca Plate plate dives under (subducts) the North American plate.
Plate Movement
They cause plate movement. The plate movement then causes an earthquake.
it never erupted, it was a lie.hope this helped :)
No scientists reported of any tectonic plate movement as of right now but the main eruption of this is ground swelling and sesmic shacking.
Plate tectonics
plate movement and plate tectonics
The cause of Mt. St. Helens' volcanism is due to the subduction melting of the Pacific Plate as it subducts under the North American Plate, located along a convergent plate boundary or fault. No, Mount Saint Helens is not on a hot spot, nor is it on a fault. Mount Saint Helens is part island arc volcanic chain (the Casade Mountaind) due to the subduction of the Pacific Plate under the North American Craton. NOTE: The Farallon Plate is no longer here; it ceased to exist with the end of the Laramide Orogeny some 30 million years ago. The remnants of the Farallon Plate are the Juan de Fuca Plate of British Columbia and northwestern Washington State, and the Cocos Plate of southwestern Mexico. Neither of these microplates has any effect on Mount Saint Helens, which is in southwestern Washington. I found this answer on answers.yahoo.com
No, they don't. In fact earthquake are a result of transform plate movement.
the movement of convection currents in the mantle is the cause of plate motion.
the movement of convection currents in the mantle is the cause of plate motion.
Mountains, Continents, Volcanoes, Islands, and Fault Lines are the 5 landforms caused by plate movement.
Earthquakes Tsunamis and ultimately on a longer time scale a volcanic eruption (destructive plate margin volcano such as mt st helens in the 1980s)