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born 1937 United States
G. Brent Dalrymple (born May 9, 1937) is an American geologist, author of The Age of the Earth and Ancient Earth, Ancient Skies, and a National Medal of Science winner.
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If two or more radiometric clocks running at different rates give the same age, this is powerful evidence that the ages are correct.
The Age of the Earth (1991)
Invoking unique, supernatural, or extraordinary causes to explain natural history was to Buffon both unnecessary and unproductive.
The Age of the Earth (1991)
Estimates of the age of the Earth made prior to about 1950, biblical or otherwise, are all wrong, because they were based on methods now known to be invalid.
The Age of the Earth (1991)
The creationist “scientific” arguments for a young Earth are absurd, I and other authors have dealt with them at length elsewhere, and they do not merit further attention here.
The Age of the Earth (1991)
Our current understanding of the chronology of the universe, Galaxy, and Solar System represents the fulfillment of a quest that required more than two centuries of endeavor and surely is one of the most notable and spectacular achievements of modern science.
The Age of the Earth (1991)
There is incontrovertible evidence from lead-isotopic data that meteorites are approximately 4.55 ± 0.02 Ga. We can presume, as the evidence indicates, that the solid bodies of the Solar System formed nearly simultaneously, and conclude that the Pb-Pb age of meteorites also represents the age of Earth.
The Age of the Earth (1991)
These calculations result in ages for the Earth of 4.52 to 4.56 Ga. Probably the best value is 4.54 Ga, found by (Fouad) Tera using the congruency point of the four oldest conformable lead ores. Its value, which is known to within 1% or better, is consistent with the ages of meteorites, the ages of the oldest lunar samples, and the ages of the oldest Earth rocks.
The Age of the Earth (1991)
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