Geologic Time Scale
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Precambrian Time
Precambrian Development of Life
Paleozoic Era
Paleozoic Development of Life
Mesozoic Era
Mesozoic Development Of Life
Cenozoic Era
Cenozoic Development Of Life
During this time the earth started to form. It formed 4.6 billion years ago due to a star exploding.
Then the beautiful oceans started to form from gases in the atmosphere. The oceans formed around 4 billion years ago.
The oldest rock, which is the igneous rock formed about 3.8 billion years ago.