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If the scientist excavate two fossils at the grand canyon, the fossil that was found much deeper layer is older.
What is fossil fuels?
A fossil fuel is hydrogen- containing material found naturally in the earth's crust from the remain of dead plants and animals that is extracted and burned as a fuel.
Fossil are natural source of energy, it is made from decomposition of plants and animals. Fossil fuels are found in earth's crust and contains carbon and hydrogen which could gives energy by burning.
Coal, oil and natural gas are best examples of fossil fuels. Coal is a material usually found in sedimentary rock deposits where rock and plants are buried from long time.
Natural gas usually found in pockets above oil deposits. It is also found where natural oil is found.
Therefore, the scientist excavate two fossils at the grand canyon, the fossil that was found much deeper layer is older.
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