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Dendrochronology: Each tree has growth rings in its trunk.This technique dates the time period during which these rings were formed.Biostratigraphy: An extended version of stratigraphy where the faunal deposits are used to establish dating.Faunal deposits include remains and fossils of dead animals.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.This Science Struck post enlists the differences between the absolute and relative dating methods.
Determine the age of fossils, rocks, or ancient monuments.
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Stratigraphy: The oldest dating method which studies the successive placement of layers.
It is based on the concept that the lowest layer is the oldest and the topmost layer is the youngest.