law of superposition


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law of superposition

[′lȯ əv ‚sü·pər·pə′zish·ən]
(geology)
The law that strata underlying other strata must be the older if there has been neither overthrust nor inversion.
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References in periodicals archive ?
Stratigraphy is based on the law of superposition, namely, the rock units on top must be younger than the ones below.
But can we use the law of superposition to prove that they're younger than Copernicus?
He had also devised the "law of superposition", the basic idea that the oldest layers of the earth are at the bottom unless they have been disturbed.
His analyses of fossilised sea creatures helped convince the world that, long ago, Tuscany had been under water, and it was he who first posited the law of superposition: the higher up a layer of sedimentary rock happens to be, the younger it is.
Additionally, each lesson focuses on understanding uncontroversial scientific material including the law of superposition (i.e., the idea that younger sediments are laid down on top of older sediments), relative vs.
Here, it is suggested that students explore the geological and physical science content pertaining to the law of superposition and fossil dating.