Meaning of lithostratigraphy

lith•o•stra•tig•ra•phy

Pronunciation: (lith"ō-stru-tig'ru-fē), [key]
— n.
  1. the study or character of stratified rocks based solely on their physical and petrographic features.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.