Coal when subject to mild metamorphism turns into Anthracite, in which the carbon content is between 92% and 98%. If squeezed and heated still further, the coal will transform into graphite and of cause if the taken to extremes diamond will be produced, but that would require the coal to be taken deep into the earth's mantle.
Bituminous coal is a sedimentary rock. Anthracite coal is considered a metamorphic rock.
Bituminous coal is a sedimentary rock. Anthracite is a metamorphosed bituminous coal, and is therefore considered a metamorphic rock.
this is because it is a mineral
Anthracite
The original rock to a metamorphic rock is called the protolith.
Anthracite coal is classified as a metamorphic rock. I've included two wikipedia links on this subject.
Anthracite coal would fit the description of a metamorphic rock that burned.
Anthracite is a metamorphic rock. Anthracite is formed when an organic sedimentary rock - coal - is compressed and heated in the ground.
Anthracite, which is metamorphosed bituminous coal.
Anthracite coal is already a metamorphic rock.
Anthracite Coal is a metamorphic rock.
Bituminous coal is consided a sedimentary rock. Anthracite coal is bituminous coal that has been metamorphosed by great pressure and heat and is considered a metamorphic rock.
Yes, anthracite coal is a type of coal that is considered a metamorphic rock, not a sedimentary rock. It forms from the metamorphism of bituminous coal at high pressures and temperatures.
The coal variety anthracite is a metamorphic rock.
Most coal is sedimentary, but anthracite is bituminous coal that has undergone metamorphosis to become a metamorphic rock.
Peat (not much of a rock).
Metamorphic rock
The original rock to a metamorphic rock is called the protolith.
It is a metamorphic rock . Also the coal is sometimes considered a sedimentary rock.
Anthracite is a metamorphic rock commonly called coal ,whose protolith or parent rock is bituminous coal.
Anthracite coal is classified as a metamorphic rock. I've included two wikipedia links on this subject.