sedimentary
Bituminous Coal
Carbonaceous sedimentary rock
AI-generated identification · may be incorrectHardness of 1.5 to 2.5 on the Mohs scale, black to dark brown color, subadamantine to dull luster, amorphous crystal structure, and specific gravity around 1.3 to 1.4.
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Physical properties
Hardness of 1.5 to 2.5 on the Mohs scale, black to dark brown color, subadamantine to dull luster, amorphous crystal structure, and specific gravity around 1.3 to 1.4.
Formation & geological history
Formed from the compaction and heating of plant debris in ancient swamps over millions of years, primarily during the Carboniferous period.
Uses & applications
Primarily used for electricity generation, steel production, and industrial heating.
Geological facts
It is the most abundant rank of coal and burns with a smoky, yellow flame due to its high volatile matter content.
Field identification & locations
Identified by its dark color, relative lightness, and propensity to leave a black streak; commonly found in sedimentary basins worldwide.
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