What is the law of superposition and how can it be used to relatively date rocks? Answer: The law of superposition is that the youngest rock is always on top and the oldest rock is always on the bottom. However the relative ages of rocks is more commonly determined by the presumed ages of the fossils found in the sedimentary layers.
The Law of Superposition makes logical sense but in practice it is the nature of the fossils found in the sedimentary layers that determine the relative ages of the rocks.
Relative dating arranges geological events – and the rocks they leave The activity offers literacy opportunities as well as practice using the.