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It is a metamorphic rock . Also the coal is sometimes considered a sedimentary rock.
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What is coal still in the ground called?
Coal still in the ground is remains named as 'coal'. It is a carboniferous rock.
Is coal a metamorphic rock?
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.
Is the origin of diamonds rock or coal?
rock coal
Is coal an inorganic rock?
No. Coal is an organic sedimentary rock.
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.
Is coal related to rock?
Coal is a form of rock. It is an organically formed sedimentary rock.
What is the parent rock for anthracite coal?
Peat (not much of a rock).
Is coal harder or softer than rock?
Coal is considered to be a rock.
Is anthracite coal a sedimentary rock?
No. Anthracite coal is a metamorphic rock.
How does coal go through the rock-cycle?
nope coal is a rock
Why is coal not considered to be a rock?
Coal is considered a sedimentary rock, except for Anthracite which is considered a metamorphic rock.
Is coal a sedimentary rocks?
Coal is a sedimentary rock. However, harder forms of coal, because of exposure to elevated temperature and pressure, are metamorphic rock.
