What are the three main types of volcanoes?

The three main types of volcanoes are: stratovolcano (or composite volcano) — a conical volcano consisting of layers of solid lava flows mixed with layers of other rock. cinder cone volcano — doesn’t have any horizontal layers, and is instead a steep conical hill of tephra (volcanic debris) that accumulates around and downwind from the vent. read more

Utah Volcanoes. Utah contains the three main types of volcanoes. The following is a brief introduction to Utah’s volcanoes; only several of numerous volcanoes are mentioned. Stratovolcanoes. Stratovolcanoes erupted in western Utah between about 40 to 25 million years ago. read more