Dating methods are classified into relative and absolute dating.
Relative dating is a science which deals with the comparative study of events from the past.
Fluorine Dating: This technique of relative dating mainly works on the principle of chemical changes taking place in the fossils.
When remains of living beings get buried into sediments and turn to fossils, the bacteria present in the soil breakdown the proteins and fats from the bones.
In anthropology, the study of humans living in the prehistoric era is done by collecting the data of human fossils found during excavations or research.
The absolute age of these events need not inevitably be known.
Grand Canyon is a gorge located in Northern Arizona, USA. While some of the layers are uplifted, most of the landform is left undisturbed by nature.
However, this is mainly applicable to an undisturbed arrangement of rocks.
Most of the rock arrangements are disturbed by natural forces, such as wind and water, which result in unconformity in the sequence of rocks.