The Law of Superposition states that the oldest layer of sedimentary rock is the one at the bottom, with each subsequent layer above being younger.
The oldest layer of sedimentary rock is the one at the bottom according to the Law of Superposition. This law states that in an undeformed sequence of sedimentary rocks, the oldest rocks are at the bottom while the youngest are on top.
For example, if we consider a river depositing layers of sand, the sand at the bottom would be the oldest, and each subsequent layer above it would be progressively younger.
Therefore, applying the Law of Superposition, the layer of sedimentary rock closest to the bottom is the oldest layer.
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