convergent is collision of two plates. A collision of a less dense continental plate with a more denser oceanic plate collides with a continental plate and the ocean plate goes under the continental plate. This takes a great deal of energy and results in the melting the continental crust, vulcanism occurs. The kinds of volcanoes , makes lava plains or sheild valcanos, Andesite is when it makes strato-volcanoes , Dacite or rhyolite is when it makes a crater such as St. Helens.