Here's the next step in that journey: the Geologic Time Scales of Earth and the Moon.
Relative techniques can determine the sequence of events but not the precise date of an event, making these methods unreliable.
The absolute dating method first appeared in 1907 with Lord Rutherford and Professor Boltwood at Yale University, but wasn’t accepted until the 1950s.
The first method was based on radioactive elements whose property of decay occurs at a constant rate, known as the half-life of the isotope.
This method has the following restrictions: a) It cannot be used to date items many thousands of years old; b) it can only be used in non-organic materials; and c) the materials to be dated must have been heated to more than 350 degrees Celsius. All of the current dating methods are going through refinement.
Archaeologists are seeking an accurate dating technique, but this method is yet to be found.