flinty state

from The Collaborative International Dictionary of English v.0.48

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]