disconformable
/ˌdɪskənˈfɔːməbl/adjective
Geology. Constituting or exhibiting a disconformity; (of a stratum) related to or lying on an underlying stratum that has the same orientation but has undergone erosion, so that the chronological sequence of strata is interrupted.
Origin
Early 17th century (in an earlier sense). From dis- + conformable.