the chronology of the earth, as based on both absolute and relative methods of age determination.

1890–95; geo- + chronology

geochronologic [jee-oh-kron-l-oj-ik] , geochronological, adjective
geochronologist, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
geochronology (ˌdʒiːəʊkrəˈnɒlədʒɪ)
the branch of geology concerned with ordering and dating of events in the earth's history, including the origin of the earth itself

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Example sentences
My area of expertise is isotope geochemistry and geochronology.
Luminescence dating is a form of geochronology that measures the energy of photons being released.
Advances in stratigraphy and geochronology require that any time scale be periodically updated.
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