Law of Superposition

1. Explain the law of superposition and how it helps scientists understand the relative ages of rock layers.

2. Imagine you find a rock formation with four layers. From top to bottom, they are: conglomerate, sandstone, shale, and limestone. According to the law of superposition, which layer is likely the oldest? Which is the youngest? Explain your reasoning.

3. The video mentions that rock layers can be folded or disturbed. Besides folding, describe another event that could disturb rock layers and make it difficult to determine relative ages using the law of superposition.