Crossword puzzle clue "first age in geologic history"

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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