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The physiographic regions of the contiguous United States comprise 8 regions, 25 provinces, and 85 sections. The system dates to Nevin Fenneman's paper ''Physiographic Subdivision of the United States'', published in 1917. Fenneman expanded and presented his system more fully in two books, ''Physiography of western United States'' (1931), and ''Physiography of eastern United States'' (1938). In these works Fenneman described 25 provinces and 85 sections of the United States physiography.
The physiographic regions of the contiguous United States comprise 8 regions, 25 provinces, and 85 sections. The system dates to Nevin Fenneman's paper ''Physiographic Subdivision of the United States'', published in 1917. Fenneman expanded and presented his system more fully in two books, ''Physiography of western United States'' (1931), and ''Physiography of eastern United States'' (1938). In these works Fenneman described 25 provinces and 85 sections of the United States physiography.
Physiographic divisions
References
{{DEFAULTSORT:United States Physiographic Region