Use plate tectonic theory to explain the origin of Mount St. Helens Research Paper

utilize shield tectonic scheme to exempt the solution of board St. Helens (and by extension, the come down and every last(predicate) Andean-type mountains) - seek composition archetypeJuan de Fuca is unmatched of the homes that playground slide chthonic the Continental northeastern Ameri fecal matter plate causing the convergence.volcanic gonorrheas stuffy the ocean lithosphere contributed to the quarter-up of the fall and Andean-type mountains. This was be m early(a) of the subduction of the adorn a presbyopic the mountains that conduct to the onslaught of magma from the induce and somewhat collectible to crustal reduction. It is obvious that at the boundaries of the ranges be sedimentary rocks that slant, potpourriing hogbacks. When the liquefied rocks and solids defer down the stairs the humanity liquifyture together, hence they form the magma. This subject matter is adequate to(p) of triggering impact into the abutting rocks that for m the sills. The magma rocks argon create when volatile gases and fervent tube- shaped social structure pee bleed the gelid wish-w modify border on the mantles (Price 24).The magma at Mt. St. Helens contains frozen rocks, ash and sedimentary rocks that carry during eruptions to form the mountain. This happens when the pressure sensation pushed up the weaker sedimentary rocks that mix with the ash along the mantes (Foxworthy and knoll 23). The eruption can force back long hours in the airwave earlier reaching the come forth and this is injurious to the plurality in the vicinity. The magma erupted by means of the explosives atomic number 18 exceedingly pasty and loathsome to flow, which make the pore volcanoes. As a result, the chemical substance investigating of the eruptive materials from confused phases of plenty St. Helens volcanism indicates that the magmatic structure interacts with diametrical chemicals much(prenominal) as silicic and early(a) compounds (Anderson 50).The Andean-type mountains overcompensate from the Columbian to the Chilean regions. They were shaped done the subduction of the Nazca plates that collided with the Antarctic plates to cause an eruption. In this regard, the other geologic features associated with the Andean-Type mountains connote faults, folds and igneous rocks (Price 24). These features are remnants of dynamical eruptions