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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 ...
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: Arctic Coastal Plain: Colorado Piedmont: Raton section Pecos Valley: Edwards Plateau: Central Texas section Central Lowland Dissected ...
1.2 Interior System. 1.2.1 Northern Plateau and Mountain Area. ... Toggle Interior Plains subsection. 2.1 Alberta Plateau. 2.1.1 Fort Nelson Lowland. 3 References.
During much of the Mesozoic Era, the North American continental interior was mostly well above sea level, with two notable exceptions. During part of the Jurassic (208-144 million years ago), rising seas flooded the low-lying areas of the continent. Much of the Interior Plains eventually lay submerged beneath the shallow Sundance Sea. [16]
In Alaska, south of the Interior Plains area, is the Rocky Mountain System, then the Intermontane Basins and Ranges, and in the southern part of the state are the Pacific Mountains and Valleys. [14] In the Alaska panhandle, the mainland mountain ranges and offshore islands (the Alexander Archipelago) are extensions of respective ranges further ...
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The Highland Rim is a physiographic section of the larger Interior Low Plateaus province, which in turn is part of the larger Interior Plains physiographic division. [1] Most of the Highland Rim is located in U.S. EPA Ecoregion 71, Interior Plateau, which is a part of the Eastern Temperate Forest.