The volcano is a broad dome formed by flowing lava. Hawaiian volcano eruptions are of this nature. Over time, some of these volcanoes can become very high mountains. An example of a shield volcano in Utah is Fumarole Butte west of Delta. Cinder cone volcanoes are steep-sided mountains formed by the eruption of cinders and ash in a fiery display.
Fragments fall from all sides of the opening.
These eruptions usually produce little flowing lava. Utah's examples of cinder cone volcanoes are Black Rock Volcano and Veyo Cinder Cone near St. George. Composite or Strato volcanoes are somewhere in between the shield and cinder cone volcanoes. They are formed by the buildup of alternating layers of lava, ash, cinders, and blocks. Mt. St. Helen and Mt. Vesuvius are examples of strato volcanoes.