I can't tell you how urbane and sprightly the old poll parrot was; and not a pocket, not a crevice, of pomp, humbug, respectability in him: he was fresh as a daisy. (William Butler Yeats).
In the area around Dubuque the Galena Dolomite is broken or cut by a series of generally trending east-west fractures or crevices These extend the fill thickness of the layer The ore minerals were deposited along these
A crevice is a narrow crack or gap, especially in a rock. a huge boulder with rare ferns growing in every crevice. a narrow crack in the surface of something, especially in rock (crevace, from crever )