geochronological

Etymology tree
Pre-Greek der.
Proto-Hellenic *gayader.
Ancient Greek γαῖᾰ (gaîă)clip.
Ancient Greek γῆ (gê)
Ancient Greek -ο- (-o-)
Ancient Greek γεω- (geō-)der.
English geo-
Ancient Greek χρόνος (khrónos)bor.
English chrono-
Proto-Indo-European *leǵ-
Ancient Greek λόγος (lógos)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-i-eh₂
Proto-Hellenic *-íā
Ancient Greek -ῐ́ᾱ (-ĭ́ā)
Ancient Greek -λογῐ́ᾱ (-logĭ́ā)bor.
Latin -logialbor.
French -logiebor.
English -logy
Proto-Indo-European *-ikos
Proto-Italic *-ikos
Latin -icuslbor.
Old French -iquebor.
Middle English -ic
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālisbor.
Old French -albor.
▲
Latin -ālis
Old French -elbor.
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Latin -ālisbor.
Middle English -al
Middle English -ical
English -ical
English -logical
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English chrono-
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English -logy
English chronology
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English -ical
English chronological
English geochronological
From geo- + chronological.