??? ??? ??? Relative Dating Any method of determining whether an event or object is older or younger than other events or objects. ??? ??? ??? Superposition The idea that younger rocks lie above older rocks in and undisturbed layer. ??? ??? ??? Absolute Dating Any method of measuring the age of an event or object in years. ??? ??? ??? Fossils Preserved remains of once-living organisms. ??? ??? ???