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onlap

[on-lap, awn-] /ˈɒnˌlæp, ˈɔn-/
noun, Geology
1.
the advance of a sea beyond its former shore.
2.
the layer or layers of sedimentary rock formed on a sea floor as a result of this advance.
Compare offlap.
Origin of onlap
1945-1950
1945-50; on + lap3
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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