Difference between radiometric and radiocarbon dating 100 dating of
This document is partly based on a prior posting composed in reply to Ted Holden.My thanks to both him and other critics for motivating me.These rates of decay are known, so if you can measure the proportion of parent and daughter isotopes in rocks now, you can calculate when the rocks were formed.Because of their unique decay rates, different elements are used for dating different age ranges.
A common form of criticism is to cite geologically complicated situations where the application of radiometric dating is very challenging.
All radiometric dating methods measure isotopes in some way.
Most directly measure the amount of isotopes in rocks, using a mass spectrometer.
This is different to relative dating, which only puts geological events in time Most absolute dates for rocks are obtained with radiometric methods.
These use radioactive minerals in rocks as geological clocks.
Each original isotope, called the parent, gradually decays to form a new isotope, called the daughter.