Where are the Great Plains and Central Lowlands located in North America?

The Great Plains and the Central Lowland (often referred to as the Central Lowlands) are major physiographic regions located in the central part of the North American continent.12

• Great Plains: This vast region of grasslands stretches from the Rio Grande in the south to the Mackenzie River delta at the Arctic Ocean in the north. It is bounded to the west by the Rocky Mountains and to the east by the Interior Lowlands and the Canadian Shield.132
• Central Lowland: This region serves as the heartland of the United States, extending 1,500 miles from New York to central Texas and reaching north into Saskatchewan, Canada. It is bounded by the Great Plains to the west, the Canadian Shield to the north and east, and the Appalachian Mountains to the east.42