Relative dating rock layers
This matching process is called correlation, which has been an important process in constructing geological timescales.Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years.Geologists have studied the order in which fossils appeared and disappeared through time and rocks.Fossils can help to match rocks of the same age, even when you find those rocks a long way apart.
Some types of relative dating techniques include climate chronology, dendrochronology, ice core sampling, stratigraphy, and seriation.
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The Permian through Jurassic stratigraphy of the Colorado Plateau area of southeastern Utah is a great example of Original Horizontality and the Law of Superposition, two important ideas used in relative dating.
These strata make up much of the famous prominent rock formations in widely spaced protected areas such as Capitol Reef National Park and Canyonlands National Park.