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English Fox - English Dictionary
Meaning of
Proterozoic era
in English
Proterozoic era
#uncommon
Definitions
Noun
the
earliest
part
of
the
Precambrian
supereon
,
extending
from
about
2
.
5
billion
to
541
million
years
ago
a
period
of
geological
time
during
which
the
Earth's
crust
was
largely
composed
of
granite
and
other
igneous
rocks
Base Words
era
Proterozoic
