​There are two main ways to determine the age of a rock, these are Relative dating and Absolute dating. Relative dating is used to determine the relative order of past events by comparing the age of one object to another.​There are two main ways to determine the age of a rock, these are Relative dating and Absolute dating

How do they date rocks?

To establish the age of a rock or a fossil, researchers use some type of clock to determine the date it was formed. Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.

What are the 3 methods of dating rocks?

Among the best-known techniques are radiocarbon dating, potassium–argon dating and uranium–lead dating.