What tectonic plates is saint Helens situated on?

Question

I'm tryin to do a case study but i dnt know what plates Mount Saint Helens sits on and what type of margin its on, PLEASE HELP! thanks

Answer 1

It sits on the boundary of the North American and Juan de Fuca plates.  This is a volcano caused by subduction of the Juan de Fuca plate under the North American plate.  Some volcanoes are where two plates are moving apart, as in Iceland, and some (the Hawaiian Islands) are over a "Hot Spot" in a plate.  That is why the islands are in a line from northwest to southeast, because the pacific plate is moving northwest.  A new undersea volcano has formed southeast of the island chain and eventually the big island (Hawaii) will move away from the hot spot and Mauna Loa and Kilauea will become inactive.  I know this is more info than you asked for, but I love volcanoes.  Perhaps I should have become a Vulcanologist rather than a Chemist.  I was on Hawaii at the volcano observatory when Pu'u O first erupted.  It was the thrill of my life to watch it.  People have forgotten that it was named Pu'u O because it was just above the O in volcano on the map, so now you will most often hear it called Pu' O'o.

Answer 2

on a fault boundry

Answer 3

Mount St. Helens is situated above the crossing of the ocean-continent subduction boundary of the Juan de Fuca plate and the subducting North American plate.

Answer 4

Yitka is certainly correct.

Answer 5

the saint Helen mountin is located in the pacifik plate,or extly in the west of the pacifik plate.

Answer 6

Mount St. Helens is associated with the subduction of the Juan de Fuca plate under the North American plate.

Tectonic plates:

http://volcano.und.edu/vwdocs/msh/ov/ovp...