offlappingadj.
/ɒfˈlapɪŋ/, U.S. /ˌɔfˈlæpɪŋ/, /ˌɑfˈlæpɪŋ/ Geology.
Forming an offlap; of lesser extent than underlying strata, which are thus uncovered at the margins.
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the world > the earth > structure of the earth > structural features > sedimentary formation > [adjective] > of or belonging to a stratum > offlapping
offlapping1906
1906 A. W. Grabau in Bull. Geol. Soc. Amer. 17 615 Examples of regressively overlapping or, better, offlapping formations are frequently met.
1921 A. W. Grabau Textbk. Geol. I. xvii. 559 If, after a retreatal movement of the sea and the formation of an offlapping series.., a transgressive movement with overlapping of formations should follow, the sandstone bed of emergence would be in part reworked.
1974 Nature 15 Nov. 200/1 The sealevel curve is based on the series of transgression-regression cycles identified from successions of offlapping coral reefs.
1997 Philos. Trans. (Royal Soc.) B. 352 502/2 Post-Roman instability of the shoreline is expressed on the mudflats and salt marshes by three, erosively-based, offlapping morphostratigraphic elements.
This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).
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