What are the different types of volcanoes?
Volcanoes are grouped into four types: cinder cones, composite
volcanoes, shield volcanoes and lava volcanoes. They are:
Cinder Cones: They are circular or oval cones made up of small
fragments of lava from a single vent. They have been blown into the
air, cooled, and fallen around the vent.
Composite: They are steel-sides and composed of many layers of
volcanic rocks. Mt. Rainier and Mount St. Helens are examples of
this type of volcano.
Shield: Shaped like a bowl or shield in the middle, they have
long gentle slopes made of basaltic lava flows. The volcanoes that
formed the basalt of the Columbia Plateau were shield
Lava Volcanoes: Deep sided mound formed by lava that is too
thick to flow. The lava piles up near the vent.