shaley


shale

S0313500 (shāl)n. A fissile rock composed of layers of claylike, fine-grained sediments.
[Probably from Middle English, shell, from Old English scealu; see skel- in Indo-European roots.]
shal′ey adj.

shaley

(ˈʃeɪlɪ) adj, -lier or -liest (Geological Science) resembling shale