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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 ...
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 ...
U.S. Interior Highlands, a mountainous region spanning eastern Oklahoma, western and northern Arkansas, southern Missouri, and the extreme southeast corner of Kansas; Interior Plains, a vast physiographic region that spreads across the Laurentian craton of North America
The Alberta Plateau is a flat and gently rolling upland in Northern Alberta and in the northeastern corner of British Columbia, Canada. [1] [2] It ranges in elevation from about 910 to 1,220 metres (3,000 to 4,000 feet) and lies in the middle of the Interior Plains, one of seven physiographic regions in Canada.
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.
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]
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]