geogonical

from The Collaborative International Dictionary of English v.0.48

Geogonic \Ge`o*gon"ic\, Geogonical \Ge`o*gon"ic*al\, a. [Cf. F.
   g['e]ogonique.]
   Of or pertaining to geogony, or to the formation of the
   earth.
   [1913 Webster]