Relative dating technique

When ‘parent’ uranium-238 decays, for example, it produces subatomic particles, energy and ‘daughter’ lead-206.Isotopes are important to geologists because each radioactive element decays at a constant rate, which is unique to that element.This is different to relative dating, which only puts geological events in time Most absolute dates for rocks are obtained with radiometric methods.These use radioactive minerals in rocks as geological clocks.

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Because of their unique decay rates, different elements are used for dating different age ranges.

Geologists often need to know the age of material that they find.

They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years.

It is a less advanced technique when compared to absolute dating.

Some methods used in relative dating are stratigraphy, biostratigraphy, and cross dating.

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