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NAL Agricultural Thesaurus
U.S. Department of Agriculture

Concept Breadcrumbs

Natural Resources, Conservation, Environment > natural resources > energy resources > fuels > fossil fuels > coal
Natural Resources, Conservation, Environment > natural resources > mineral resources > fossil fuels > coal
Fields of Study > geology > phytoliths > coal
Fields of Study > geology > rocks > sedimentary rocks > coal
Preferred Term:

carbón

Definition:
Roca negra o negra parduzca fácilmente inflamable cuya composición, que incluye la humedad inherente, es de más de 50 % en peso y más de 70 % en volumen de material carbonoso. Está formada por restos vegetales que han sido compactados, endurecidos, alterados químicamente y metamorfoseados por el calor y la presión a través del tiempo geológico.
Concept Schemes:
NALT Core
Términos Genéricos:
rocas sedimentarias, fitolitos, combustibles fósiles
Términos Específicos:
URI:
https://lod.nal.usda.gov/nalt/27354
Download this Concept:
RDF/XMLCreated 2006-01-19, last modified 2020-10-07
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