'Flinty rock' definitions:

Definition of 'Flinty rock'

From: GCIDE

Flinty \Flint"y\, a. [Compar. Flintier; superl. Flintiest.] Consisting of, composed of, abounding in, or resembling, flint; as, a flinty rock; flinty ground; a flinty heart. [1913 Webster]
Flinty rock, or Flinty state, a siliceous slate; -- basanite is here included. See Basanite. [1913 Webster]