Lava plateau

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A lava plateau is a flat, wide surface (plateau) that is formed when lava comes out of the ground and spreads out very quickly. The layers of lava can build up over time to form a lava plateau. Here are general properties of lava plateaus:

  • They are very large areas of basaltic lava with a layered structure.
  • Lava makes the plateau bigger, and higher, with each eruption.
  • They tend to be flat.
  • Ocean ridge eruptions make large plains on the sea floor.
  • The lava of these plateaus are thin and runny.
  • These plateaus take millions of years to form.

One example of a lava plateau is the Columbia Plateau in Washington, Oregon, and Idaho in the United States. Its area is 63,000 square miles (160,000 km²) and is 6,000 feet(1.8 km) thin. Another example of a lava plateau is the Antrim Plateau in County Antrim, Northern Ireland.