Page:U.S. Government Printing Office Style Manual 2008.djvu/360

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Physiographic regions

Physiographic regions are based on terrain texture, rock type, and geologic structure and history. The classification system has three tiers: divisions, which are broken into provinces, and some provinces break further into sections. All names are capitalized, not the class; for graphic see http://tapestry.usgs.gov/physiogr/physio.html.

Physiographic Regions of the Lower 48 United States

Division	Province	Section
Laurentian Upland	Superior Upland.
Atlantic Plain	Continental Shelf.
	Coastal Plain	Embayed.
		Sea Island.
		Floridian.
		East Gulf Coastal Plain.
		Mississippi Alluvial Plain.
		West Gulf Coastal Plain.
Appalachian Highlands	Piedmont	Piedmont Upland.
		Piedmont Lowlands.
	Blue Ridge	Northern.
		Southern.
	Valley and Ridge	Tennessee.
		Middle.
		Hudson Valley.
	St. Lawrence Valley	Champlain.
		Northern.
	Appalachian Plateaus	Mohawk.
		Catskill.
		Southern New York.
		Allegheny Mountain.
		Kanawha.
		Cumberland Plateau.
		Cumberland Mountain.
	New England	Seaboard Lowland.
		New England Upland.
		White Mountain.
		Green Mountain.
		Taconic.
	Adirondack.
Interior Plains	Interior Low Plateaus	Highland Rim.
		Lexington Plain.
		Nashville Basin.
	Central Lowland	Eastern Lake.
		Western Lake.
		Wisconsin Driftless.
		Till Plains.
		Dissected Till Plains.
		Osage Plains.