Meaning of geochronology

ge•o•chro•nol•o•gy

Pronunciation: ( jē"ō-kru-nol'u-jē), [key]
— n.
  1. the chronology of the earth, as based on both absolute and relative methods of age determination.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.