law of superposition of strata

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law of superposition of strata (principle of superposition) Strata are deposited sequentially, so that in an undistrubed sedimentary succession each layer of rock is younger than the layer beneath it. Subsequent earth movements may overturn and invert this sequence. The law was first proposed in the 17th century by Nicolaus Steno.

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law of superposition of strata See faunal succession.

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superposition, law of In geology, law that states that in undisturbed layers of sedimentary deposits, younger beds overlie older ones.