Example of chronometric dating
This means that the oldest are the strata that are lying at the bottom.
However, age of deposition does not mean the age of artifacts found in that layer.
This is possible because properties of rock formations are closely associated with the age of the artifacts found trapped within them.
The most popular method of radio dating is radio carbon dating which is possible because of the presence of C-14, an unstable isotope of carbon.
Scientists measure the proportion of carbon-14 left in the organism to determine its age.
This is a method that does not find the age in years but is an effective technique to compare the ages of two or more artifacts, rocks or even sites.
Upper most layers are considered the youngest while the lowermost deposition is considered as oldest.
• Relative dating does not tell the exact age, it can only compare items as younger and older.
Relative dating helps determine what came first and what followed, but doesn't help determine actual age.
Radiometric dating, or numeric dating, determines an actual or approximate age of an object by studying the rate of decay of radioactive isotopes, such as uranium, potassium, rubidium and carbon-14 within that object. This rate provides scientists with an accurate measurement system to determine age.