Geographic Regions of the United States

In their best-selling book, "The Geography of North America," Hardwick, Shelly and Holtgrieve define 13 geographic regions of the United States. The first 13 vignettes cover those regions.

Geographers tend to base regions on unifying physical characteristics like landforms and climate. But two of the regions described by Hardwick, et al., Megalopolis and MexAmerica, are areas of common cultural character.

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