Numerical age dating
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Biostratigraphy: An extended version of stratigraphy where the faunal deposits are used to establish dating.
Faunal deposits include remains and fossils of dead animals.
Absolute dating, also called numerical dating, arranges the historical remains in order of their ages.
Whereas, relative dating arranges them in the geological order of their formation.
Dendrochronology: Each tree has growth rings in its trunk.
This technique dates the time period during which these rings were formed.
The amount of fluorine absorbed indicates how long the fossil has been buried in the sediments.➤ It determines the age of a rock/object using radiometric techniques.➤ Absolute dating is quantitative.➤ This technique helps determine the exact age of the remains.➤ It is more specific than relative dating.➤ Absolute dating is expensive and time-consuming.➤ It works best for igneous and metamorphic rocks.Relative techniques are of great help in such types of sediments.➤ It determines if an object/event is younger or older than another object/event from history.➤ Relative dating is qualitative.➤ This technique helps determine the relative age of the remains.➤ It is less specific than absolute dating.➤ Relative dating is comparatively less expensive and time-efficient.➤ It works best for sedimentary rocks having layered arrangement of sediments.The following are the major methods of relative dating.The relative dating techniques are very effective when it comes to radioactive isotope or radiocarbon dating.
However, not all fossils or remains contain such elements.To find their age, two major geological dating methods are used.