What Are The Compositions And Rock Types Occuring In Volcanic Magmatism Range?
A mountain belt develops on the continental margin, built up by multiple intrusions of igneous rock and eruption of lava. When an oceanic plate collides with the continental plate, magma develops primary from the melting of peridotite in the wedge of the mantle above the subducted plate. The magma produces basaltic and andesitic lavas, along with a few dacites and rhyolites, and granitic batholiths that intrude into the continental crust. In these magmatic belts the assemblages of igneous rocks is more silica. Than those found in island arcs, perhaps because the magma derived from the mantle assimilates the melting continental crust. Metamorphic rocks are also found in these magmatic belts, typically the result of re-crystallization under high temperatures and low pressures. These conditions occur because the hot fluids rise close to the surface, delivering much heat to this low pressure environment. Thick sediments, many of them turbidities, eroded from the continent rapidly fill the
