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U.S. Interior Highlands

 

 
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U.S. Interior Highlands
 
 
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The U.S. Interior Highlands is a mountainous region spanning eastern Oklahoma
Oklahoma

Oklahoma is a U.S. state and a sovereignty located in the South Central United States and Southern United States of the United States of America ....
, western and northern Arkansas
Arkansas

Arkansas is a U.S. state located in the Southern United States of the United States. Arkansas shares a border with six states, with its eastern border largely defined by the Mississippi River....
, southern Missouri
Missouri

Missouri is a U.S. state in the Midwestern United States of the United States bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska....
, and the extreme southeast corner of Kansas
Kansas

The State of Kansas is a Midwestern U.S. state in the Central United States of the United States of America, an area often referred to as the United States "Heartland"....
. The name is designated by the United States Geological Survey to refer to the combined mountainous region of the Ozarks and Ouachita Mountains
Ouachita Mountains

The Ouachita Mountains are a mountain range located in west central Arkansas and Kiamichi country Oklahoma. The range's subterranean roots may extend as far as central Texas, or beyond it to the current location of the Marathon Uplift....
, which form a distinct physiographic division
Physiographic regions of the world

The physiographic regions of the world are a means of defining the Earth's landforms into distinct regions based upon Nevin Fenneman's classic three-tiered approach of divisions, provinces and sections, in 1916, which although they date from the mid 1910s, are still considered basically valid, and were the basis for similar classifications of...
. It is the only major highland region between the Rocky Mountains
Rocky Mountains

The Rocky Mountains, often called the Rockies, are a mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometre from the northernmost part of British Columbia, in Canada, to New Mexico, in the United States....
 and the Appalachian Mountains
Appalachian Mountains

The Appalachian Mountains or , often called the Appalachians, are a vast mountain range in eastern North America. Definitions vary on the precise boundaries of the Appalachians....
 in the United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
.

The region is occupied by the Ozark mountain forests
Ozark Mountain Forests

The Ozark Mountain Forests is a temperate broadleaf and mixed forests ecoregion of the central United States delineated by the World Wide Fund for Nature....
, an ecoregion of temperate broadleaf and mixed forests
Temperate broadleaf and mixed forests

Temperate broadleaf and mixed forests are a temperate and humid biome. The typical structure of these forests include four layers. The upper most layer is the canopy which is composed of tall mature trees....
.






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The U.S. Interior Highlands is a mountainous region spanning eastern Oklahoma
Oklahoma

Oklahoma is a U.S. state and a sovereignty located in the South Central United States and Southern United States of the United States of America ....
, western and northern Arkansas
Arkansas

Arkansas is a U.S. state located in the Southern United States of the United States. Arkansas shares a border with six states, with its eastern border largely defined by the Mississippi River....
, southern Missouri
Missouri

Missouri is a U.S. state in the Midwestern United States of the United States bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska....
, and the extreme southeast corner of Kansas
Kansas

The State of Kansas is a Midwestern U.S. state in the Central United States of the United States of America, an area often referred to as the United States "Heartland"....
. The name is designated by the United States Geological Survey to refer to the combined mountainous region of the Ozarks and Ouachita Mountains
Ouachita Mountains

The Ouachita Mountains are a mountain range located in west central Arkansas and Kiamichi country Oklahoma. The range's subterranean roots may extend as far as central Texas, or beyond it to the current location of the Marathon Uplift....
, which form a distinct physiographic division
Physiographic regions of the world

The physiographic regions of the world are a means of defining the Earth's landforms into distinct regions based upon Nevin Fenneman's classic three-tiered approach of divisions, provinces and sections, in 1916, which although they date from the mid 1910s, are still considered basically valid, and were the basis for similar classifications of...
. It is the only major highland region between the Rocky Mountains
Rocky Mountains

The Rocky Mountains, often called the Rockies, are a mountain range in western North America. The Rocky Mountains stretch more than 4,800 kilometre from the northernmost part of British Columbia, in Canada, to New Mexico, in the United States....
 and the Appalachian Mountains
Appalachian Mountains

The Appalachian Mountains or , often called the Appalachians, are a vast mountain range in eastern North America. Definitions vary on the precise boundaries of the Appalachians....
 in the United States
United States

The United States of America is a Federal government constitutional republic comprising U.S. state and a federal district. The country is situated mostly in central North America, where its Contiguous United States and Washington, D.C., the Capital districts and territories, lie between the Pacific Ocean and Atlantic Oceans, Borders of the U...
.

The region is occupied by the Ozark mountain forests
Ozark Mountain Forests

The Ozark Mountain Forests is a temperate broadleaf and mixed forests ecoregion of the central United States delineated by the World Wide Fund for Nature....
, an ecoregion of temperate broadleaf and mixed forests
Temperate broadleaf and mixed forests

Temperate broadleaf and mixed forests are a temperate and humid biome. The typical structure of these forests include four layers. The upper most layer is the canopy which is composed of tall mature trees....
. Parts of the area are covered by three national forests: The Ouachita National Forest
Ouachita National Forest

The Ouachita National Forest is a National Forest that lies in the western portion of Arkansas and portions of eastern Oklahoma.The Ouachita National Forest is the oldest National Forest in the southern United States....
 in Oklahoma and Arkansas, the Ozark-St. Francis National Forest
Ozark-St. Francis National Forest

The Ozark-St. Francis National Forest is located in the state of Arkansas. It is composed of two separate forests, Ozark National Forest and St....
 in Arkansas, and the Mark Twain National Forest
Mark Twain National Forest

Mark Twain National Forest is a national forest located in the southern half of Missouri. MTNF was established on September 11, 1939. It is named for author Mark Twain, a Missouri native....
 in Missouri.