Earth Catastrophes
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Precambrian Era
Paleozoic Era
Mesozoic Era
Cenozoic Era
Geologic Time scale
Geologic Time Scale:
What is the first period?
Precambrian
When will geologic time scale end?
Geologic History is ongoing- it has not ended
How to read the geologic time scale:
Read from top to bottom usually it is in chronological order.