Rock layers found deeper are older than shallower layers. Is this an example of a law or a theory? What is the name of this law or theory? Explain your answer in at least 2 sentences.

The law of superposition, a key stratigraphy theory, notes that the oldest layer is at the base within a series of sedimentary rock layers and that the layers are increasingly younger with an ascending order in the sequence.

Explanation:

increased stability in the completion of fluorine's outer shell.