enough time from 15 billion to 5 billion years ago enough time if the earths crust formed an occasion whenever only unicellular organisms while the earliest kinds of life are present
- Like or of the earliest kinds of animal life
- of or owned by earlier in the day of two divisions of Precambrian era
- enough time from 3,800 million years to 2,500 million years ago; planet's crust created; unicellular organisms tend to be very first types of life
- Like or of the earliest forms of animal life.
(a.) Like or belonging to the very first forms of animal life.
The remainder of Finland is built up of the oldest known crystalline rocks belonging to the Archaeozoic or Algonkian period.