dactylitic

dactylitic

[dak·tə′lid·ik]
(geology)
Of a rock texture, characterized by fingerlike projections of a mineral that penetrate another mineral.
References in periodicals archive ?
Such dactylitic texture is not unknown among minerals of the spinel group (see, e.
Its minute grains gradually recrystallize into bigger ones which finally cause the destruction of the dactylitic texture and replace it by an irregular aggregate.