Crossword puzzle clue "first age in geologic history"

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Here are the possible solutions for first age in geologic history clue

Answer
Clue
Relevancy
azoic
Clue
First age in geologic history
Geologic age meaning "without life"
Pre-life geologic age, formerly
Definition
lacking life, esp. of geological period
era
Clue
One of ten in geologic history
Definition
a main division of geological time
archean
Clue
Of a geologic age
Definition
relating to the archaea, an order of prokaryootic microorganisms, also ARCHAEAL, ARCHAEAN, ARCHAEON
eon
Clue
Geologic age
Definition
a long period of time, also AEON
garysheffield
Clue
Baseball player who hit his first home run at age 19 (Brewers, 1988) and his last at age 40 (Mets, 2009): 2 wds.
ufo
Clue
"__ Hunters": History Channel show with the tagline "Hoax or History?"

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