Priscoan eon
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Priscoan eon Definition
(n)
the
earliest
eon
in
the
history
of
the
Earth
from
the
first
accretion
of
planetary
material
(
around
4
,
600
million
years
ago
)
until
the
date
of
the
oldest
known
rocks
(
about
3
,
800
million
years
ago
);
no
evidence
of
life
Priscoan eon Synonyms
Hadean
Hadean aeon
Hadean eon
Hadean time
Priscoan
Priscoan aeon
Priscoan eon
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