A complex volcano (English: volcano complex or compound volcano), a volcano is building that consists of several volcanic types, none of which dominates the appearance.
Such volcanoes are formed when the outbreak behavior changed significantly, or shift the break-out points. So stratovolcanoes can lose their top and form a caldera, grow up in the then cinder or lava domes by a large Plinian eruption.
The island of Ischia in Italy is a typical example. It was here on an old caldera lava domes, and cinder cones Tuffringe. Tuffablagerungen and lava flows form in addition the landscape.
The ounces in Japan consists of several overlapping layer volcanoes and Lavadomen that have become known for their dangerous pyroclastic flows.
Other examples are: