Answer:
The law of superposition is a law in geology that states that in undisturbed sedimentary rock, the oldest layers are at the bottom and the youngest layers are at the top. This law is based on the principle that layers of sediment are deposited one on top of the other, and that the layers are not disturbed by erosion or other forces.
Here are some reasons why the law of superposition is considered a law:
- It has been tested and verified by experiment.
- It is consistent with other laws of physics and chemistry.
- It is simple and easy to understand.
- It is widely applicable to a wide range of sedimentary rocks.
- It has been used to make accurate predictions about the age of sedimentary rocks.
- It has been used to reconstruct the history of the Earth.