United States physiographic region
From Infogalactic: the planetary knowledge core
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This list of physiographic regions of the contiguous United States identifies the 8 regions, 25 provinces, and 85 sections.[1] The system dates to Nevin Fenneman's paper Physiographic Subdivision of the United States, published in 1917.[2] Fenneman expanded and presented his system more fully in two books, Physiography of western United States (1931),[3] and Physiography of eastern United States (1938).[4] In these works Fenneman described 25 provinces and 85 sections of the United States physiography.[5]
Physiographic divisions
References
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