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onlap

[ on-lap, awn- ]

noun

, Geology.
  1. the advance of a sea beyond its former shore.
  2. the layer or layers of sedimentary rock formed on a seafloor as a result of a sea’s advance beyond its former shore.


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Word History and Origins

Origin of onlap1

First recorded in 1945–50; on + lap 3

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onkusonlay