coal

  • Coal - Wikipedia

    Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams.The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure.Coal is composed primarily of carbon, along with variable quantities of other elements, chiefly hydrogen ...

  • Etymology· Formation· Ranks· Early uses as fuel· Uses today· Coal industry
  • U.S. Energy Information Administration (EIA) - Coal

    Energy Information Administration - EIA - Official Energy Statistics from the U.S. Government

  • Coal - Wikipedia

    Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams.The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure.Coal is composed primarily of carbon, along with variable quantities of other elements, chiefly hydrogen ...

  • Etymology· Formation· Ranks· Early uses as fuel· Uses today· Coal industry
  • U.S. Energy Information Administration (EIA) - Coal

    Energy Information Administration - EIA - Official Energy Statistics from the U.S. Government

  • Coal - Wikipedia

    Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams.The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure.Coal is composed primarily of carbon, along with variable quantities of other elements, chiefly hydrogen ...

  • Etymology· Formation· Ranks· Early uses as fuel· Uses today· Coal industry
  • U.S. Energy Information Administration (EIA) - Coal

    Energy Information Administration - EIA - Official Energy Statistics from the U.S. Government