granular limestone

from The Collaborative International Dictionary of English v.0.48

granular \gran"u*lar\ (gr[a^]n"[-u]*l[~e]r), a. [Cf. F.
   granulaire. See {Granule}.]
   Consisting of, or resembling, grains; as, a granular
   substance.
   [1913 Webster]

   {granular limestone}, crystalline limestone, or marble,
      having a granular structure.
      [1913 Webster]