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Geosciences

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Concept information

substance > solid substance > rock > sedimentary rock > coal
... > substance > chemical substance > mixed chemical substance > rock > sedimentary rock > coal
... > substance > chemical > mixed chemical substance > rock > sedimentary rock > coal
... > substance > chemical substance > mixture > rock > sedimentary rock > coal
... > substance > chemical > mixture > rock > sedimentary rock > coal
... > substance > chemical substance > chemical compound > natural resource > fossil fuel > coal
... > substance > chemical > chemical compound > natural resource > fossil fuel > coal
... > substance > chemical substance > compound > natural resource > fossil fuel > coal
... > substance > chemical > compound > natural resource > fossil fuel > coal

Preferred term

coal  

Type

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Definitions

  • Coal is a readily combustible black or brownish-black sedimentary rock. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure. It is composed primarily of carbon along with variable quantities of other elements, chiefly sulfur, hydrogen, oxygen and nitrogen. [Wikipedia]

Obsolete

  • false

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URI

http://www.irandoc.acir/onto/irandoc/SWEETT09972

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