Superposition means that one geological form evolves into an other one. Cross cutting determines whether the relationship to one thing is related to another, and it determines how old or young thins are. The Grand Canyon demonstrates superposition and cross cutting because this place is very old, but new things could also be evolving there. The Grand Canyon demonstrated superposition and cross cutting in many ways.
        The Grand Canyon shows superposition because this place shows that the rocks at the bottom are the oldest, and the ones at the top are the youngest. This shows how it is possible to determine the age of the rocks. Superposition is great for the Grand Canyon because it has formed a long time ago. Cross cutting is apart of the Grand Canyon also because it also shows the age of the rocks there in the Grand Canyon. That is how the Grand Canyon demonstrates superposition and cross cutting. 

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