Search results
Results From The WOW.Com Content Network
The Interior Plains are highlighted in red. The Interior Plains is a vast physiographic region that spreads across the Laurentian craton of central North America, extending along the east flank of the Rocky Mountains from the Gulf Coast region to the Arctic Beaufort Sea.
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 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 ...
The Great Plains (United States) and the Canadian Prairies. 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.
The most significant area of the prairies, from Indiana to North Dakota, consists of till plains, that is, sheets of unstratified drift. The plains are 30, 50 or even 100 ft (up to 30 m) thick covering the underlying rock surface for thousands of square miles except where postglacial stream erosion has locally laid it bare.
The Interior Plains is a vast region that spreads across the stable core of North America. This area had formed when several small continents collided and welded together well over a billion years ago, during the Precambrian.
If the region is defined to include areas only covered by prairie land, the corresponding region is known as the Interior Plains. [4] Physical or ecological aspects of the Canadian Prairies extend to northeastern British Columbia, but that area is not included in political use of the term. [5]
The Interior Low Plateaus lie at the southern edge of the glacial boundary. Unlike the till plain to the north, the underlying bedrock is generally close to the surface, and the topography of an area depends on how resistant the underlying bedrock is to erosion.