= puff stone n. at puff, n. adj.compounds 2.

argilliferous marlite.

any sedimentary rock derived from clay or silt; esp. one lacking the laminations of shale.

Rock consisting of, or having the composition of, consolidated marl; marlite. Also: spec. an iron-rich oolitic limestone of the Middle Lias of…

A hard, consolidated marl which resists the decomposing action of air.

A sediment or sedimentary rock or composed of very fine clay or mud particles, esp. of hydrated aluminium silicates; lutite.

= pelite, n.