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18-Oct-2020 01:52

The occurrence of such fossil fuels is frequently associated with the presence of the remains of certain ancient life-forms.

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Geologists use this type of method all the time to establish relative ages of rocks.Plus, get practice tests, quizzes, and personalized coaching to help you succeed.Try it risk-free Discover how geologists study the layers in sedimentary rock to establish relative age.Following the Principle of Original Horizontality, he could say that whatever forces caused the deformation, like an earthquake, must have occurred after the formation of all the rock strata.

Since we assume all the layers were originally horizontal, then anything that made them not horizontal had to have happened after the fact.Let's look at these rock strata here: We have five layers total.