BITUMINOUS COAL

 

Bituminous coal is a higher rank of coal above lignite (although there is a transitional rank called sub-bituminous coal).  Bituminous coals tend to break and weather in a blocky fashion, are relatively sooty to the touch, and are harder & heavier than lignite (but still relatively soft & lightweight).  Slightly discernible plant fossil fragments may be present on bituminous coal bedding planes.  Bituminous coals commonly have irregular patches of shiny, glassy-textured organic matter.

 

Bituminous coal (5.5 cm across)

 


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