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The time span of Ediacaran Period was 635 million years to 538.8 million years ago, while it's duration was approx. 96.2 million years.

The time span of Cambrian period was 538.8 million years to 485.4 million years ago, while it's duration was approx. 53.4 million years.

The time span of Ordovician period was 485.4 million years to 443.8 million years ago, while it's duration was approx. 41.6 million years.

The time span of Silurian period was 443.8 million years to 419.2 million years ago, while it's duration was approx. 24.6 million years.

The time span of Devonian period was 419.2 million years to 358.9 million years ago, while it's duration was approx. 60.3 million years.

The time span of Carboniferous period was 358.9 million years to 298.9 million years ago, while it's duration was approx. 60 million years.

The time span of Permian period was 298.9 million years to 251.9 million years ago, while it's duration was approx. 46.998 million years.

The time span of Triassic period was 251.9 million years to 201.4 million years ago, while it's duration was approx. 50.502 million years.

The time span of Jurassic period was 201.4 million years to 145 million years ago, while it's duration was approx. 56.4 million years.

The time span of Cretaceous Period was 145 million years to 66 million years ago, while it's duration was approx. 79 million years.