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USGS CMG InfoBank: Faunal Succession

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Comment: 13:07 - 14:07 (01:00)
Source: Annenberg/CPB Resources - Earth Revealed - 10. Geologic Time
Keywords: fossil, "Principle of Faunal Succession", "faunal succession", Darwin, evolution

Our transcription: The word "fossil" refers to any evidence of a prehistoric plant or animal that has been preserved in rock.
Sometimes part of the organism itself remains intact, in some instances recrystallized or petrified like the trees in a petrified forest.
In other cases, the organism may have been completely dissolved leaving only a hollow mold of its own image.
Throughout geologic time, fossil species succeed each other in a distinct recognizable order.
In general, progressively older fossils are increasingly different from life forms today.
This observation came to be known as the "Principle of Faunal Succession", one of the strongest lines of evidence supporting Darwin's Theory of Evolution.

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