= 2 ways of dealing with time.…
A. Absolute Time
an actual number
radiometric dating
B. Relative Time
relative order of events
Concepts of relative and absolute time combined to create =>
Geologic Time Scale
Units of time
Eon, Era, Period
II. Relative Time
=> Relative Dating = sequence of events through time: establishing
order in with rocks are deposited and subsequently deformed and altered.......…
- based on the principle of uniformitarianism
1) Principle of superposition
Oldest layers on the bottom => younger layers near the top
2) law of cross-cutting relationships
3) law of inclusions