Geologic Time Scale
Geologic events such as life forms that are recorded in Earth's history.
Fossil Records
Fossils and Fossil Records are used as evidence because when palentolgists find older fossils its easy to tell because they are much simpler. When they find more recent fossils it is a lot more complex.
Law Of Superposition
The Law Of Superposition is something geologists use to determine the layers of sedimentary rocks.