Concept information
Preferred term
coal
Type
-
Product
Definition
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A readily combustible black or brownish-black rock whose composition, including inherent moisture, consists of more than 50 percent by weight and more than 70 percent by volume of carbonaceous material. It is formed from plant remains that have been compacted, hardened, chemically altered, and metamorphosed by heat and pressure over geologic time.
Source: US Environmental Protection Agency
Type: Concept definition
Broader concept
Narrower concepts
In other languages
-
Spanish
URI
https://lod.nal.usda.gov/nalt/27354
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