Grandunification.com Home Geological Periods


Name of Period
Age
Formation of earth
estimated to have occurred 4.5 billion years ago
Cambrian
550-500 million years ago
Ordovician
500-440 million years ago
Silurian
440-405 million years ago
Devonian
405-370 million years ago
Carboniferous
370-290 million years ago
Permian
290-250 million years ago
Triassic
250-205 million years ago
Jurassic
205-135 million years ago
Cretaceous
135-65 million years ago
Tertiary
65 million years ago-today

More Info

Georgia Perimeter College