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Define relative age dating

This is different to relative dating, which only puts geological events in time Most absolute dates for rocks are obtained with radiometric methods.

Contrary to this, absolute dating is the technique, using which the exact age of the artifacts, fossils, or sites are ascertained.

Sedimentary rock is made of particles derived from other rocks, so measuring isotopes would date the original rock material, not the sediments they have ended up in.

However, there are radiometric dating methods that can be used on sedimentary rock, including luminescence dating.

The table below shows characteristics of some common radiometric dating methods.

Geologists choose a dating method that suits the materials available in their rocks. Measuring isotopes is particularly useful for dating igneous and some metamorphic rock, but not sedimentary rock.

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