They are also called as the middle plains and they are a broad and flat land that covers the prairies, steppes and the grasslands located in the United States and coves the noddle parts of the Mississippi River has a length of about 3,200 km and has an area of about 1,300,000 km square.
<u>Covering the Alberta and southern Saskatchewan, and a narrow band of southern Manitoba. And their physiological division covers much of the middle North America and is referred to as plain states. </u>
