Answer :
Final answer:
The principle of original horizontality explains that sedimentary layers are usually deposited horizontally due to gravity, with any tilting indicating later tectonic activity.
Explanation:
The principle of original horizontality states that sediments accumulate in essentially horizontal layers. This means that layers of sediment are typically deposited horizontally due to gravity. If these layers are observed to be tilted, it suggests that tectonic forces have later affected them.
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