GEOCHRONOLOGY

[geo.chro.nol.o.gy] n (1893) 1: the chronology of the past as indicated by geologic data

2: the study of geochronology -- geo.chro.no.log.i.cal also geo.chro.no.log.ic adj -- geo.chro.no.log.i.cal.ly adv -- geo.chro.nol.o.gist n