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14 Cards in this Set
- Front
- Back
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James Usher
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(1581-1665) Biblical scholar, published claim of age and origin of earth in 1958. Made his assumptions on the bible that he took as fact. He said that the earth is about 6000 years old. Did the same thing as John Lightfoot.
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John Lightfoot
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(1602-1675) Did the samething as James Usher. He said that man was created at 9 am.
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Abraham Werner
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(1749-1817) Proponent of Neptunism (rocks deposited as a result of precipitation from a global ocean)
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James Hutton
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(1726-1797) Introduced idea of "Deep Time" & Uniformitarianism. Principle of cross-cutting relationship. Proponent of Plutonism (rocks formed from subterranean heat)
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Charles Lyell
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91797-1876) Proponent of uniformitarianism. He used what he saw around him instead of the bible. "The present is the key to the past..."
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Louis Agassiz
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(1807-1873)Propoent of Catastrophism. A 6,000 year old earth possible because things change suddenly in catastrophies.
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William Smith
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(1769-1839) Created the first geologic map.
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Charles Darwin
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(1809-1882) "the Origin of Species" Proponent of evolution. Did same thing as Alfred Wallace.
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Alfred Wallace
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(1823-1913) Proponent of evolution. Did the same thing as Charles Darwin.
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Georges Leclerc
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(1751)He suggested that the earth was once entirely molten. Estimated that the Earth was 96,670 years, then revised date to 74,832 years old. Saw how long it took a "to scale" iron ball to cool,and estimated how long it took earth to cool enough for us to walk on.
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Benoit De Maillet
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(1656-1738) Speculated on human descended from marine ancestors, on geologic age of the earth, and on the origins of mountains. He was the first to claim that the earth was billion of years old, but he had no proof.
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John Joly
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(1857-1933) Based the age of the earth off the the salinity of the ocean. Thought earth was millions of years old.
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Henri Becquerel
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(1852-1908) discovered radioactivity
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Bertram Boltwood
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(1870-1927) first to radiometric date a rock in 1907. Said that the age of earth was 2 billion years old.
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