Accurate dating can be obtained using radiometric dating
This uses the phenomenon of radioactive decay of isotopes
When sedimentation occurs radioactive isotopes are incorporated
These decay to form other atoms at a known rate
This rate is measured as the half-life of the isotope, defined as the time taken for half the parent atoms to decay to the daughter atoms
Accurate dating can be obtained using radiometric dating This uses the phenomenon of radioactive decay of isotopes When sedimentation occurs radioactive isotopes are incorporated These decay to form other atoms at a known rate This rate is measured as the half-life of the isotope, defined as the time taken for half the parent atoms to decay to the daughter atoms