Question
What is one of the main, common-sense ideas that geologists use to learn what happened first and what happened later in geologic history?.
Answer
The law of superposition states that in a sequence of undisturbed sedimentary rocks, the oldest rocks will be at the bottom and the youngest rocks will be at the top.
- Q: What is the law of superposition? A: The law of superposition states that in a sequence of undisturbed sedimentary rocks, the oldest rocks will be at the bottom and the youngest rocks will be at the top.