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Contents of 7.2 How are geologic events placed in relative order?

7.2 How are geologic events placed in relative order?

• By the application of a set of geological "rules"
• First is the Principle of Superposition - This states that when rocks were placed, newer ones were placed or formed on top of the older ones

So here at the Grand Canyon - the old rocks are on the bottom of the pile, and the new ones are on top.

Fig. 7.2