Relative dating geology lab
But really, how do scientists figure out how old their dinosaur bones are?
When they find a section of rock that has a lot of different strata, they can assume that the bottom-most layer is the oldest and the top-most layer is the youngest.
One of the biggest jobs of a geologist is establishing the absolute age, in years, of a rock or fossil.
Unlike relative dating, which only tells us the age of rock A compared to rock B, numerical dating tells us the age of rock A in x number of years.
Scientists piece together a story of how one event came before or after another.
Relative dating cannot tell us the actual age of a rock; it can only tell us whether one rock is older or younger than another.