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law of superposition

noun

  1. Geology. a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.


law of superposition

  1. Geology.
    A general law stating that in any sequence of sediments or rocks that has not been overturned, the youngest sediments or rocks are at the top of the sequence and the oldest are at the bottom.
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Example Sentences

Adjacent strata in any region are arranged according to the LAW OF SUPERPOSITION, i.e. any stratum is younger than that on which it was deposited, just as in a pile of paper, any sheet was laid later than that on which it rests.

Nor can the law of superposition be used in identifying and comparing the strata of different regions where the formations cannot be traced continuously from one region to the other.

By means of the law of included organisms and the law of superposition the formations of different countries and continents are correlated and arranged in their natural order.

The chart given on page 295 is thus based on the law of superposition and the law of the evolution of organisms.

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