![]() These types of volcanoes are very dangerous due to the viscosity of their magma. Due to this type of interaction it is possible for there to be an abundance of magma which will search for weak points in the crust through which to pass. There is partial melting that occurs as the subducting plate passes into the upper mantle releasing water and lowering the rock melting point. These volcanoes are common at this boundary because of the way subduction forces the mantle to act. This volcano erupted laterally which is common for these types of volcanoes and expelled a cloud of ash that blanketed the northwest United States of America. One such eruption that devastated numerous towns was of Mount St. These cones are highly dangerous if they were to erupt because of their expulsion of pyroclastic rock and especially the clouds of ash and gasses. The volcanoes that we observe along this convergent boundary are composite volcanoes that have been highly active for many years. ![]() These volcanoes are large cones made up of layers of erupted material and lava flows. Composite volcanoes or stratovolcanoes are large highly dangerous volcanoes that make up much of the Ring of Fire. They are characterized by lava flows that mainly occur before the volcano goes dormant. For this reason, they are very common and often lead to the creation of volcanic islands.Cinder cone volcanoes are more likely composed of small cinders of ejected lava fragments that have hardened into a cone around what was most likely a single erupting event. Shield volcanoes are formed by large basaltic lava flows and are usually large and originate as seamounts. Th ere are three types of volcanoes that have been classified in geology and each has its own distinct characteristics.
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