Category:Argillaceous

Ar`gil*la"ceous, a. Etym: [L. argillaceus, fr. argilla.]

Defn: Of the nature of clay; consisting of, or containing, argil or clay; clayey. Argillaceous sandstone (Geol.), a sandstone containing much clay.

-- Argillaceous iron ore, the clay ironstone.

-- Argillaceous schist or state. See Argillite.