San Diego Natural History Museum
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Geologic Timeline: The last 144 million years of Earth's 4.6 billion year history.

The Exhibition
Educational Resources
Activities Online
Fossil Field Guide
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Activities Online

A dinosaur puzzle.

Who Moved the Body?
A dinosaur puzzle.


What Am I?
Explore dinosaur fossil clues.


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Pleistocene Epoch 1.8 million-10,000 years ago.
Pliocene Epoch 5-1.8 million years ago.
Miocene Epoch 24-5 million years ago.
Oligocene Epoch 34-24 million years ago.
Eocene Epoch 53-34 million years ago.
Paleocene Epoch 65-55 million years ago.
Cretaceous/Tertiary Boundary Rock, 65 million years ago.
Cretaceous Period 144-65 million years ago.
Earth's history began 4.6 billion years ago.
MYA = million years ago.