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How old is the earth according to radioactive dating

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Radioactive dating using uranium decay to lead gives an age near 4. The oldest rocks recovered from ancient geological strata are about 3. The oldest moon rock samples from the lunar highland regions are about 4. And meteorite samples recovered from many localities indicate ages of 4. Presumably, this meteoritic material dates from a time when the solar system was just forming, and the planets had not as yet begun to appear. The oldest signs of life in the form of fossil bacteria, date from about 3.
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How old is the Earth?

How old is the earth according to radioactive dating
How old is the earth according to radioactive dating
How old is the earth according to radioactive dating
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How Old Is The Earth -

Here I want to concentrate on another source of error, namely, processes that take place within magma chambers. To me it has been a real eye opener to see all the processes that are taking place and their potential influence on radiometric dating. Radiometric dating is largely done on rock that has formed from solidified lava. Lava properly called magma before it erupts fills large underground chambers called magma chambers. Most people are not aware of the many processes that take place in lava before it erupts and as it solidifies, processes that can have a tremendous influence on daughter to parent ratios. Such processes can cause the daughter product to be enriched relative to the parent, which would make the rock look older, or cause the parent to be enriched relative to the daughter, which would make the rock look younger.
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How Old Is The Earth

Metrics details. Earth scientists have devised many complementary and consistent techniques to estimate the ages of geologic events. Annually deposited layers of sediments or ice document hundreds of thousands of years of continuous Earth history. Gradual rates of mountain building, erosion of mountains, and the motions of tectonic plates imply hundreds of millions of years of change.
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Aristotle thought the earth had existed eternally. Roman poet Lucretius, intellectual heir to the Greek atomists, believed its formation must have been relatively recent, given that there were no records going back beyond the Trojan War. The Talmudic rabbis, Martin Luther and others used the biblical account to extrapolate back from known history and came up with rather similar estimates for when the earth came into being. Within decades observation began overtaking such thinking. In the s Nicolas Steno formulated our modern concepts of deposition of horizontal strata.
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