Radiometric dating encyclopedia

Measurements should be taken on samples from different parts of the rock body.

This helps to counter the effects of heating and squeezing, which a rock may experience in its long history.

Radiocarbon dating is one kind of radiometric dating, used for determining the age of organic remains that are less than 50,000 years old.

For inorganic matter and for older materials, isotopes of other elements, such as potassium, uranium, and strontium, are used.

Radiometric dating is also used to date archaeological materials, including ancient artifacts.

Between 18 he elucidated the complex sequence of chemical reactions attending the precipitation of salts (evaporites) from the evaporation of seawater.Also, by extrapolating backward in time to a situation when there was no lead that had been produced by radiogenic processes, a figure of about 4.6 billion years is obtained for the minimum age of the Earth.This figure is of the same order as ages obtained for certain meteorites and lunar rocks.any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it.

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