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Fluorine dating: Bones from fossils absorb fluorine from the groundwater.

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.

Dendrochronology: Each tree has growth rings in its trunk.

This technique dates the time period during which these rings were formed.

The area of intersection of both sets depicts the functions common to both.

numerical dating techniques-22

The following are the major methods of relative dating.The two approaches are often complementary, as when a sequence of occurrences in one context can be correlated with an absolute chronlogy elsewhere.Local relationships on a single outcrop or archaeological site can often be interpreted to deduce the sequence in which the materials were assembled.Radiometric dating: This technique solely depends on the traces of radioactive isotopes found in fossils.The rate of decay of these elements helps determine their age, and in turn the age of the rocks.




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