The Grand Canyon demonstrates crosscutting and superposition because of the way it's rocks is shaped. It can be due to weather effects like erosions or something else. 
   
Crosscutting and superposition affect the Grand Canyon because everyone should know that the Grand Canyon didn't naturally look like it was now back then. Back then, it must've been solid ground like every other mountain or canyon. However, as time pasts on, crosscutting and superposition has started its effect little by little. It also messes up the rock layers. Superposition only works if the rock layers are not bothered, however, if the layers are bothered in different ways, like folding, then superposition would definitely not work.



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