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Why are older fossils found deeper than younger fossils?

April 26, 2017deeper fossils Older younger

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Why are older fossils found deeper than younger fossils?

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The deeper ones were deposited first. The geologic law of superposition states that, in undisturbed strata, newer layers will be deposited over older layers; thus, in a core sample containing fossils, those samples nearest the surface will be newer in age than those beneath them.