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One of Steho's laws of stratigraphy states that:
- In a sedimentary sequence, the units at the bottom are older than those at the top.
This principle helps geologists understand the relative ages of sedimentary layers. It is based on the concept of superposition, which means that in an undisturbed sequence of sedimentary rocks, the oldest rocks are found at the bottom, and the youngest rocks are found at the top.
By applying this law, geologists can interpret the chronological order of events that occurred in the past, such as the deposition of sediment layers over time. This law is fundamental in stratigraphy and plays a crucial role in reconstructing Earth's history based on rock layers and fossils found in them.
Therefore, in the context of Steho's laws of stratigraphy, the statement "In a sedimentary sequence, the units at the bottom are older than those at the top" aligns with one of the fundamental principles of relative dating in geology.
