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Meaning of superposition

su•per•po•si•tion

Pronunciation: (s"pur-pu-zish'un), [key]
— n. Geol.
  1. the order in which sedimentary strata are superposed one above another. Cf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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