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Anthracite could be considered an organic metamorphic rock as its protolith is bituminous coal, an organic sedimentary rock.
Coal is considered an organic sedimentary rock, except for anthracite which is considered a metamorphic rock.
Anthracite is a metamorphic rock. Anthracite is formed when an organic sedimentary rock - coal - is compressed and heated in the ground.
None of the above. Marble is a metamorphic rock.
Parent rock, or protolith, is the rock from which a specific metamorphic rock was derived. The type of rock beforemetamorphism.
No limestone is sedimentary. It can be either an organic sedimentary rock, or a clastic sedimentary rock.
this would be organic sedimentary
Coal, other than the metamorphic form called anthracite, is an organic sedimentary rock.
An organic metamorphic rock, also known as biogenic, is composed of materials from the activities of living organisms. Coal, which is formed from undecayed compacted plant matter from ancient swamps, and Limestone, which is formed from deposits of shells or skeletal fragments that collect at the bottom of the ocean are examples of organic metamorphic rock.
It is an igneous (volcanic) rock. Never has been alive. Inorganic.
It is a sedimentary rock made almost entirely of bones and shells.
Metamorphic rocks, like slate or quartizite, or even diamonds.