interfinger

American  

[in-ter-fing-ger] / ˌɪn tərˈfɪŋ gər /

verb (used without object)

Geology.

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

---

Etymology

Origin of interfinger

First recorded in 1970–75; inter- + finger