Question

When lava flows over a large area and cools, it creates a large, flat surface of what type of rock?

Answer 1

igneous

A lava plateau is made of a large amount of fluid lava. The lava flows over a large area and cools. This creates a large, flat surface of igneous rock. Lava plateaus may be huge. The Columbia Plateau covers over 161,000 square kilometers  63,000 square miles . It makes up parts of the states of Washington, Oregon, and Idaho.