USGS - science for a changing world

Science Topics

(a) Large, indefinite portions of the earth's surface. (b) Specified districts or territories. (c) Areas of interest or activity; spheres. (d) Ecology. Parts of the earth characterized by distinctive animal or plant life. [Adapted from American Heritage Dic. of the English Language, 4th ed.]
Alexandria Digital Library Feature Type Thesaurus
Agricultural regions
Biogeographic regions
Climatic regions
Coastal zones
Economic regions
Land regions
Linguistic regions
Map regions

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Page Last modified: 09:28 on 14-Feb-2013