The three major types of volcanoes are the cinder cone, the shield volcano and the stratovolcano. Each type differs in shape, size, erupted materials and eruption type.
The shape of a cinder cone volcano resembles a steep hill with straight sides. At no more than 300 meters high, it is a small, explosive volcano. The shield volcano has a slight slope that contains a convex upward shape. It can be tens of kilometers across and is quiet when it erupts. The stratovolcano's shape consists of steep upper slopes and gentle lower slopes. It is concave upward. It is up to 10 kilometers in diameter and explosive in eruption type.