lithologic

from The Collaborative International Dictionary of English v.0.48

Lithologic \Lith`o*log"ic\, Lithological \Lith`o*log"ic*al\, a.
   [Cf. F. lithologique.]
   1. (Geol.) Of or pertaining to the character of a rock, as
      derived from the nature and mode of aggregation of its
      mineral contents.
      [1913 Webster]

   2. Of or pertaining to lithology.
      [1913 Webster]