For example, JJA Worsaae used this law to prove the Three Age System.
Numerical dating determines the actual ages of rocks through the study of radioactive decay.
Relative dating places events or rocks in their chronologic sequence or order of occurrence.
Absolute dating places events or rocks at a specific time.
The scholar most associated with the rules of stratigraphy (or law of superposition) is probably the geologist Charles Lyell.
The basis for stratigraphy seems quite intuitive today, but its applications were no less than earth-shattering to archaeological theory.