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different types of coal pictures

  • Different Types of Coal | Different Types of Coal

    It is also known as the hard coal. It is the oldest and least common type of coal. It is blacker and denser. Bituminous and Anthracite together fall in the category of Hard coals. Images Courtesy: coalcampmemories Plain text This …


  • Coal Types

    Depending upon the evolutionary phase of coal formation there are essentially four types of coal. The variety of coal types is based on energy density and the carbon contents of coal. …


  • What are the types of coal? | U.S. Geological Survey

    The four ranks are: Anthracite: The highest rank of coal. It is a hard, brittle, and black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Bituminous: …



  • What are the different types of coal?

    This process takes millions of years. Types, or "ranks," of coal are determined by carbon content. There are four types of coal, ordered from highest to lowest rank below. Anthracite, or "hard coal," contains the highest amount of carbon out …




  • The Different Types of Coal

    There are six main types of coal that are regularly used by humans: Peat Peat is formed from decaying vegetation, and is considered to be the …