According to radiometric dating of meteorites how old is earth how to pick a dating site username

From there, we can begin to calculate the age of the earth.

Let’s do a rough calculation to show how this works.

The number of parent atoms originally present is simply the number present now plus the number of daughter atoms formed by the decay, both of which are quantities that can be measured.

Samples for dating are selected carefully to avoid those that are altered, contaminated, or disturbed by later heating or chemical events.

Together with stratigraphic principles, radiometric dating methods are used in geochronology to establish the geological time scale.

For this particular element,  the half-life is 4.47 billion years and uranium/lead dating is  useful for rocks between 1 million and 4.5 billion years (as luck  would have it! Other elements are also used (potassium/argon for  example).

The choice of element depends on how widespread it is -  if it isn't found in many rocks then it's not very useful.

And how  long the half-life is - if the half life is shorter than the age of  most rocks then its equally unuseful.

Radiometric dating can only  be performed on igneous rocks.

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