The Precambrian was the first period of time.
Geologic history is ongoing- it has not ended!
How to read the Geologic time scale-
Era's (The longest division) are marked by striking and world wide changes.
Periods are characterized by types of living organisms worldwide at the time.
Smaller units called Epochs are characterized by different types of life forms.
Geologic history is ongoing- it has not ended!
How to read the Geologic time scale-
Era's (The longest division) are marked by striking and world wide changes.
Periods are characterized by types of living organisms worldwide at the time.
Smaller units called Epochs are characterized by different types of life forms.