Types of Fossils

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What is a fossil?

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A fossil is the preserved remains or impression of a living organism from the past.

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What is fossil formation?

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Fossil formation is the process through which living material is replaced with mineral substances in the remains of an organism.

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What is a mold fossil?

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A mold fossil is a fossilized impression made in the substrate, a negative image of the organism.

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What is a cast fossil?

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A cast fossil is formed when a mold is filled in with minerals or sediments that harden over time, creating a positive image of the organism.

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What is a trace fossil?

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A trace fossil is a fossil record of biological activity but not the preserved remains of the plant or animal itself. Examples include footprints, burrows, and feces.

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What is a body fossil?

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A body fossil is the actual physical remains of an ancient organism, such as bones, teeth, or shells.