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The Interior Plains physiographic area stretches across Canada and the United States, and the two governments each use a different hierarchical system to classify their portions. In Canada, the Interior Plains makes up one of seven physiographic areas included in the highest level of classification - defined as a "region" in that country.
USGS map colored by paleogeological areas and demarcating the sections of the U.S. physiographic regions: Laurentian Upland (area 1), Atlantic Plain (2-3), Appalachian Highlands (4-10), Interior Plains (11-13), Interior Highlands (14-15), Rocky Mountain System (16-19), Intermontane Plateaus (20-22), & Pacific Mountain System (23-25) The legend ...
Map of North America, with the Interior Plains region highlighted in red. Date: 11 October 2006: Source: ... with the Interior Plains region highlighted in red. ...
The term "Great Plains" is used in the United States to describe a sub-section of the even more vast Interior Plains physiographic division, which covers much of the interior of North America. It also has currency as a region of human geography , referring to the Plains Indians or the Plains states .
Mixed prairie is more common and is part of the dry interior plains that extend from Canada south to the U.S. state of Texas. The northern short grasslands (WWF terminology) shown here on a map of North America in green, is a type of true prairie (grassland) that occurs in the southern parts of the Prairie Provinces.
The Laurentian Highlands, the Interior Plains and the Interior Highlands lie between the two coasts, stretching from the Gulf of Mexico northward, far beyond the national boundary, to the Arctic Ocean. The central plains are divided by a hardly perceptible height of land into a Canadian and a United States portion.
The Dissected Till Plains is a sub-unit of the Central Lowlands in the Interior Plains of North America. It is centered on the Iowa-Missouri state line. The eastern border is the Mississippi River and bounded on the south by the Missouri River Valley across central Missouri. Its western boundary is about 100 miles (160 km) west of the Missouri ...
Interior Highlands: Ozark Plateaus: Springfield-Salem Plateaus: Boston Mountains: Ouachita province Arkansas Valley Ouachita Mountains: Interior Plains: Interior Low Plateaus Highland Rim section: Lexington Plain Nashville Basin: Great Plains: Missouri Plateau, Glaciated: Missouri Plateau, Unglaciated: Black Hills: High Plains: Plains Border ...