ANSWER: Relative dating is used to determine the relative ages of geologic strata, artifacts, historical events, etc.This technique does not give specific ages to items.Where are the oldest pictures, by year, going to be in your stack? Often igneous intrusions will cut across layers of rock.The principle of cross-cutting relationships states that the intrusions are younger than the rock they cut. If you did it like many people, you based your sentences on what you know normally happens when you make a lunch.This is similar to what geologists do to determine age.The ten strata systems that compose the “standard geologic column” are the familiar Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, and Tertiary periods.
Archaeologists have access to various techniques for dating archaeological sites or the objects found on those sites.Ice cores showed the age of a military plane buried in the artic as thousands of years old.Similarly, dendrochronology measures the tree rings in trees and assumes they represent years.This theory held that the past was the key to the future and that processes that formed the layers were the very slow processes that we see forming layers at the bottom of the ocean today. Until Lyell successfully convinced scientists that uniformitarianism was the correct theory, it was believed that the worldwide flood and other catastrophic events were primarily responsible for the formation of the geologic layers and that they didn’t represent long ages.