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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.
What else can I help you with?
What metamorphic rock is currently known as coal?
Anthracite coal is classified as a metamorphic rock. I've included two wikipedia links on this subject.
What is the name of the original rock metamorphic rock?
The original rock that undergoes metamorphism to form a metamorphic rock is called a protolith or parent rock.
Is anthracite an igneous metamorphic or sedimentary?
Anthracite is a metamorphic rock. Anthracite is formed when an organic sedimentary rock - coal - is compressed and heated in the ground.
What is a very hard rock that burns with a high heat and smoke a metamorphic rock formed from coal?
The rock you are referring to is anthracite coal, which is a type of metamorphic rock formed from coal with a high carbon content. Anthracite coal burns with a high heat and produces little smoke due to its high carbon content and low volatile matter.
A metamorphic rock formed from coal?
Anthracite is a metamorphic rock formed from coal. Through heat and pressure, coal is transformed into anthracite, which is a hard, dark rock with high carbon content. It has a lustrous appearance and is often used as a fuel source.
Is anthracite coal a sedimentary rock?
No. Anthracite coal is a metamorphic rock.
What metamorphic rocks is commly known as''coal''?
The coal variety anthracite is a metamorphic rock.
Is Anthracite coal igneous metamorphic or sedimentary?
Anthracite coal is a type of metamorphic rock. It forms from the transformation of bituminous coal under increased temperature and pressure over time.
Is coal metamorphic?
Most coal is sedimentary, but anthracite is bituminous coal that has undergone metamorphosis to become a metamorphic rock.
What is the parent rock for anthracite coal?
Peat (not much of a rock).
Why is coal still a rock?
It is a metamorphic rock . Also the coal is sometimes considered a sedimentary rock.
What metamorphic rock is currently known as coal?
Anthracite coal is classified as a metamorphic rock. I've included two wikipedia links on this subject.
What metamorphic rock is commonly known as coal?
Anthracite is a metamorphic rock commonly called coal ,whose protolith or parent rock is bituminous coal.
What rock is formed when coal is transformed to metamorphic rock?
shale
Metamorphic rock formed from coal?
anthracite
Is coal an igneous rock sedimentary rock or 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.
What is a metamorphic rock commonly known as coal?
Anthracite
