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Geologic Terms and Geographic Divisions

Sources: Manual of Instructions for the Survey of the Public Lands of the United States, Bureau of Land Management, GPO; Initial Points of the Rectangular Survey System, C. Albert White, 1996.

See http://www.blm.gov/wo/st/en/prog/more/cadastralsurvey.html for more information on prinicipal meridians and base lines.

.—Information compiled from numerous public domain Web sites; references cite different lengths for the same river depending on origin.

Source: Information courtesy of the U.S. Geological Survey; see http://ga.water.usgs.go/edu/riversofworld.html.