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This is technically not a sedimentary rock because it has gone through more than just compaction and cementation. For this rock to form, chemical reactions at depth transform the original plant material into a black, chalky substance. It is the primary source of fuel in power plants around the world.Group of answer choiceschalkconglomeratesandstonecoal

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This is technically not a sedimentary rock because it has gone through more than just compaction and cementation. For this rock to form, chemical reactions at depth transform the original plant material into a black, chalky substance. It is the primary source of fuel in power plants around the world.Group of answer choiceschalkconglomeratesandstonecoal

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Solution

The correct answer is coal. This is because the description provided matches the formation process of coal. It is formed from the remains of plants that lived and died millions of years ago, when parts of the Earth were covered with huge swampy forests. The chemical reactions at depth transform the original plant material into a black, chalky substance, which is coal. It is also the primary source of fuel in power plants around the world.

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