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USGS CMG InfoBank: Introduction to Geologic Time

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Comment: 00:40 - 01:42 (01:02)
Source: Annenberg/CPB Resources - Earth Revealed - 10. Geologic Time
Keywords: introduction, "Archbishop Usher", "geologic age", "growth ring", "radiometric age dating", Bible, geologist

Our transcription: More than 300 years ago in Ireland, Archbishop Usher calculated the age of Earth based on the Book of Genesis.
He determined that our planet was created 4,004 years before the Birth of Christ, on the 26th of October, at 9 o'clock in the morning.
Widely praised by scholars and theologians, Usher's calculation was not seriously challenged in the Western World for almost a century.
Today scientific evidence indicates that Earth is much older than biblical text suggests.
By counting growth rings, botanists have found trees as much as 8,000 years old, and with the development of radioactive age dating, geologists have concluded that our planet came into being not thousands, but billions of years ago.

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