Are the layers of rock above and below the coal older or younger?

The layer of the rock is older than the layer above it and younger than the layer below it.

Explanation:

According to the law of superposition, the layer which is above is always younger than the layer below it. This law is based on the very common fact that the older layer had to lay down first and then a new layer formed above it. This process is used to determine the relative age of the rocks.