The Interior Plains
The Interior Plain all started with an ancient sea that dried up , it is now known as the Interior Plains. The rocks below the ground where the water used to be contains coal, oil and gas. The land in the Interior Plain is some of the best farmland in the world.The farmers grow wheat, oats, and barly. They also raise farm animals.The land is not flat. The land has lowlands, hoodoos, and rolling hills.