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The physiographic regions of the contiguous United States comprise 8 divisions, 25 provinces, and 85 sections. [1] The system dates to Nevin Fenneman 's report Physiographic Divisions of the United States, published in 1916. [2] [3] The map was updated and republished by the Association of American Geographers in 1928. [4]
Division 2: Middle Atlantic (New Jersey, New York, and Pennsylvania) Region 2: Midwest (designated as the North Central Region before June 1984) [8] Division 3: East North Central (Illinois, Indiana, Michigan, Ohio, and Wisconsin) Division 4: West North Central (Iowa, Kansas, Minnesota, Missouri, Nebraska, North Dakota, and South Dakota) Region ...
Corn Belt, midwestern and southern states where corn is the primary crop. Cotton Belt, southern states where cotton is or was a primary crop. Fruit Belt, an area where fruit growing is prominent, specially oranges at the state of Florida and grapes at California. Indiana Gas Belt, a region of Indiana that was the site of a natural gas boom in ...
v. t. e. The megaregions of the United States are eleven regions of the United States that contain two or more roughly adjacent urban metropolitan areas that, through commonality of systems, including transportation, economies, resources, and ecologies, experience blurred boundaries between the urban centers, perceive and act as if they are a ...
The term "United States," when used in the geographical sense, refers to the contiguous United States (sometimes referred to as the Lower 48, including the District of Columbia not as a state), Alaska, Hawaii, the five insular territories of Puerto Rico, Northern Mariana Islands, U.S. Virgin Islands, Guam, American Samoa, and minor outlying possessions. [1]
Fifty Level II regions were created to allow for a narrower delineation of Level I areas. Three level I areas were not subdivided for level 2. [2] Level III subdivides the continent into 182 smaller ecoregions; of these, 104 lie partly or wholly with the United States. [1] [3] Level IV is a further subdivision of Level III ecoregions. Level IV ...
The Northeastern United States, also referred to as the Northeast, the East Coast, [b] or the American Northeast, is a geographic region of the United States located on the Atlantic coast of North America. It borders Canada to its north, the Southern United States to its south, the Midwestern United States to its west, and the Atlantic Ocean to ...
Geology of the United States. Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised great ...