slaty

Composed of or resembling slate.

Having the color of slate.

Resembling slate; having the nature or properties of slate: as, a slaty color or texture; a slaty feel.

Resembling slate; having the nature, appearance, or properties, of slate; composed of thin parallel plates, capable of being separated by splitting.

cleavage, as of rocks, into thin leaves or plates, like those of slate; — applied especially to those cases in which the planes of cleavage are not parallel to the planes of stratification. It is now believed to be caused by the compression which the strata have undergone.

a variety of gneiss in which the scales of mica or crystals of hornblende, which are usually minute, form thin laminæ, rendering the rock easily cleavable.

Resembling the mineral slate.

of the color of slate or granite