interfinger

[ in-ter-fing-ger ]
/ ˌɪn tərˈfɪŋ gər /

verb (used without object) Geology.

(of sedimentary rocks) to change laterally from one type to another in a zone where the two types form interpenetrating wedges.

Origin of interfinger

First recorded in 1970–75; inter- + finger
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019