Biogeographic regions

Geographic regions characterized chiefly by the dominant forms of plant life and the prevailing climate. [Adapted from American Heritage Dic. of the English Language, 4th ed.]
This category is also used for biomes, ecoregions, and vegetation.
Alexandria Digital Library Feature Type Thesaurus
Wetlands (1 items)
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Digital map of surficial geology, wetlands, and deepwater habitats, Coeur d'Alene river valley, Idaho

Details of materials and geologic environments in an area where a long history of mining has enriched stream sediments in silver, lead, zinc, arsenic, antimony and mercury, copper, cadmium, manganese, and iron.