Key to relative dating - Law of superposition - Wikipedia


Geologists establish the age of rocks in two ways: numerical dating and relative dating. Numerical dating determines the actual ages of rocks through the study of radioactive decay. Relative dating cannot establish absolute age, but it can establish whether one rock is older or younger than another. Relative dating requires an extensive knowledge of stratigraphic succession , a fancy term for the way rock strata are built up and changed by geologic processes. In this lesson, we'll learn a few basic principles of stratigraphic succession and see whether we can find relative dates for those strange strata we found in the Grand Canyon.


Key to relative dating

Key to relative dating