How does radiometric dating work black book of online dating com
An hour glass is only useful if it is not disturbed.
But after rocks crystallize from molten magma, they can be heated and cooled; they can be affected by metamorphic events and groundwater.
Radioactive decay is where the parent atoms change as a result of radioactive decay into daughter atoms, like the individual grains of sand falling from the top to the bottom of the glass.
The hourglass depends on the sand falling at a regular rate.
There are many different radioactive isotopes that are used for radiometric dating.
Some isotopes, however, are unstable and decay radioactively into other elements.by Tas Walker Radioactive dating begins by carefully measuring the concentrations of radioactive isotopes in rocks.Everything is composed of elements and there are about 90 naturally occurring ones, such as hydrogen, carbon, oxygen and iron.Some small pieces of other rock, or even some foreign minerals, may have been carried along by the magma and existed long before the rock crystallized.Other minerals may have grown inside the rock much later, during a time when the area was heated and metamorphosed.