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Precambrian Period
The Precambrian Era was the longest single time period in Earths history. The creation of oceans and Earths atmosphere was created in this time period. -
Cambrian Period
The Cambrian period was the first geological time period of the Paleozoic Era. During this period a major event in earths history happened called the Cambrian Explosion where most animals came into the picture. -
Ordovician Period
In this period Land was broken up into the south and the north, The north area was almost entirely ocean when the south was almost entirely land. This period lasted about 45 million years. -
Silurian Period
In this period underwater life thrived. Sea levels rose due to melting of large ice glaciers. -
Devonian Period
The Devonian Period is known as the age of fish. Lots of water life including fish and other evolving water animals. -
Carboniferous Period
This period in known for its vast swamp forest, Swamps produced coal which hints the name carboniferous. This period was about 300 (ma) -
Permian Period
This was the last Period of the Paleozoic Era, The super continent Pangaea was formed. -
Triassic Period
This is the first period in the Mesozoic Era.This was about 251 million years ago. In this period dinosaurs and other reptiles came into play. -
Jurassic Period
This Period was known as the age of dinosaurs, the reason for that is Most dinosaurs came into the picture some very small and some as large as 3 ton trucks. -
Cretaceous Period
This period was about 65.5 million years ago. It was the last period in the Mesozoic Era it was also the longest in the Mesozoic Era. It was approximately 79 million years from the minor extinction event that closed the Jurassic period. -
Tertiary Period
This Period was known as the sub-era of the Cenozoic Era it divides into 5 epochs, starting with the Paleocene, and followed by the Eocene, Oligocene, Miocene, and pilocene -
Quaternary Period
This Period was divided into 2 epochs known as the Pleistocene and the Holocene Epochs about 2.588 (ma).