Shield Volcanoes -
-is the third type of volcano.
-built almost entirely of fluid lava flows.
-they are built up slowly by the accretion of thousands of highly fluid lava flows known as basalt lava that spread widely over great distances, and then cool as thin dipping sheets.
-known as one of the largest volcanoes in the world.
-lava plateaus like basalt lava can be seen in southeastern Washington, Iceland, southern Idaho, and eastern Oregon.