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Definition of: geochronology
(jē′ō·krə·nol′ə·jē) noun
The age of the earth, as determined by the observation and study of geologic, geographic, climatic, and biological processes.
—ge·o·chron·o·log·ic (jē′ō·kron′ə·loj′ik) or ·i·cal adjective
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