It is most common to find volcanoes where an oceanic plate collides with a continental plate. It is the boundary between the Pacific Plate and the continental plates around it that is called the ring of fire because so many volcanoes are formed at this boundary.In the collision the denser oceanic plate will be forced underneath of the continental plate.This is called 'subduction', and it usually occurs in destructive plate boundaries. Volcanoes are then formed, when the oceanic plate melts and the molten rock rises, being squeezed up by the forces of the mass above.olcanoes are formed by any of three different geologic processes: The first one, which has little to nothing to do with plate tectonics, is the presence of a hot spot. A â¦ hot spot is a specific area below the earth's crust in which there is an abnormally high pressure of magma (underground molten rock).
(Etiology) 1  Alpersâ Disease is caused by mutations in the POLG polymerase gene. 2  Mitochondria are important for energy production in the body cells; they are the primary source of energy for the bodyâs cells. 3  This causes a progressive degeneration of grey matter in the brain.
Albinism is caused by a defect in one of several genes that produce or distribute melanin (natural pigment). The defect may result in the absence of melanin production, or a reduced amount of melanin production.