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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.
Map of North America, with the Interior Plains region highlighted in red. Date: 11 October 2006: Source: modification of Image:North_america.svg: Author: Swid: Permission
The U.S. Interior Highlands is a mountainous region in the Central United States spanning northern and western Arkansas, southern Missouri, eastern Oklahoma, and southern Illinois. [1] The name is designated by the United States Geological Survey to refer to the combined subregions of the Ouachita Mountains south of the Arkansas River and the ...
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 ...
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 Plains – part of the interior continental United States, it includes much of what is called the Great Plains. Interior Highlands – also part of the interior continental United States, this division includes the Ozark Plateau. Rocky Mountain System – one branch of the Cordilleran system lying far inland in the western states.
Extreme north Alabama marks the southeast border of the Interior Plains province, characterized by flat or gently rolling terrain. In Alabama, this province generally lies north of the Tennessee River. [1] [4] This province is further divided into the Interior Low Plateaus province. [3]
Between its coastal mountain ranges, North America has vast flat areas. The Interior Plains spread over much of the continent, with low relief. [64] The Canadian Shield covers almost 5 million km 2 of North America and is generally quite flat. [65] Similarly, the north-east of South America is covered by the flat Amazon basin. [66]