Three methods of dating rocks updating video bios int 10
For example, fission track dating measures the microscopic marks left in crystals by subatomic particles from decaying isotopes.
Another example is luminescence dating, which measures the energy from radioactive decay that is trapped inside nearby crystals.
Geologists use radiocarbon to date such materials as wood and pollen trapped in sediment, which indicates the date of the sediment itself.
Measuring isotopes is particularly useful for dating igneous and some metamorphic rock, but not sedimentary rock.
All radiometric dating methods measure isotopes in some way.