The Law of Superposition helps scientists determine the relative ages of rocks by analyzing sedimentary rock layers.
The Law of Superposition states that in an undeformed sequence of sedimentary rocks, the oldest rocks are at the bottom while the youngest are on top. This principle helps scientists determine the relative ages of rocks by analyzing the layering of sedimentary rocks.
For instance, imagining a river depositing sand into an ocean, the newly deposited sand layers on top of older seafloor sand. Applying the law of superposition allows geologists to create a relative time scale of rock layers, with the oldest rocks at the bottom and the youngest at the top.
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