there is not a certain size a coal rock can be because they come in all sizes.
No. Anthracite coal is a metamorphic rock.
Coal is a form of rock. It is an organically formed sedimentary rock.
Peat (not much of a rock).
Coal is classified as a sedimentary 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.
It is a metamorphic rock . Also the coal is sometimes considered a sedimentary rock.
Coal is a sedimentary rock. However, harder forms of coal, because of exposure to elevated temperature and pressure, are metamorphic rock.
Coal forms from the remains of plants that have been buried in Earth's crust for millions of years. Over time, heat and pressure from the layers of rock above it compress the plant material, forming coal. This process of transformation from plant material to coal is part of the rock cycle, as coal is a type of sedimentary rock.
No, coal is a sedimentary rock composed mostly of the remains of ancient vegetation (except for anthracite coal which is a metamorphic rock, see image above)..
no coal doesn't have the 5 characteristics of a rock
A vein in rock is a line that contains another mineral besides the larger percentage of what the rock is made up of. A vein, for example, could be a vein of coal in a coal mine. Coal is extracted out of the rock.
Coal is a sedimentary rock. However, harder forms of coal, because of exposure to elevated temperature and pressure, are metamorphic rock.