The Wheeler Formation has been previously dated to approximately 507 million year old, so we know the trilobite is also about 507 million years old.
Another way of looking at the term becomes the directive where the age of an object becomes important with relation to another one.
Here, the actual age of that tool may not be useful, but the connection with the other and the history among them takes precedence.
Idea that something is older or younger relative to something else Expressed in terms of order.
Assignment of an age to a physical remain based on the association with other remains of known age.
Using relative dating the fossil is compared to something for which an age is already known.