Start Archeological dating method

Archeological dating method

Cross-dating of sites, comparing geologic strata at one site with another location and extrapolating the relative ages in that manner, is still an important dating strategy used today, primarily when sites are far too old for absolute dates to have much meaning.

Archaeologists use many different techniques to determine the age of a particular artifact, site, or part of a site.

For more information on stratigraphy and how it is used in archaeology, see the Stratigraphy glossary entry.

Based on a discipline of geology called stratigraphy, rock layers are used to decipher the sequence of historical geological events.

The isotope of Potassium-40, which has a half-life of 1.25 Billion years, can be used for such long measurements.