Relative dating principles of rocks

Often when geologists examine rock outcrops like the one illustrated above they are interested in not only the types of rocks present, but the order in which they formed.

To do this geologists use the Laws of Relative Dating.

We don't need to know what year any of these movies came out to place them in order of relative age.

Nemo is the oldest, followed by Twilight, Hunger Games, and the Avengers Again, we have not stated anything about the actual age of these movies, we've just put them in order relative to one another.

The laws of physics and chemistry that governed geologic processes in the past are the same as those that govern processes now and in the future.

The geologic timescale is a chronology (calendar) of events on Earth based on obtaining ages of past events.

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