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
INTERACTIVE
FOSSIL FIELD GUIDE

Fossil Field Guide A-Z
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Explore More About Fossils

For Kids

Enter Dinosaur Dig! Fossil Mysteries Online Activities
Dinosaur Dig
Dinosaur Bytes
Finding Fossils
The Mystery of the Ankylosaur

General

Fossil Mysteries Exhibition
Casting a T. rex Skull
Dinosaurs of San Diego County
Fossil FAQs
Geologic Timeline
Glossary
Illustrated Guide Bibliography
Recommended Reading
Science of Jurassic Park FAQs

Fossil Finds

Balboa Park: Pliocene Clams
Baleen Whale Skeletons and Columbian Mammoth
Chula Vista: fossil whale skull
The Elusive Pliocene Rocky Shore
Excavation site in Oceanside reveals fossils of mammoth, mastodont, and tapir
Fossil Insects and Crustaceans
Fossil Snake Discovered
Fossil Walrus Remains Found at Otay Ranch
Pleistocene Mammal Discoveries
Pliocene Era Whale Uncovered
SDNHM excavation: Pliocene Fossils
Skull of Giant Pliocene Sea Cow Discovered at Otay Ranch
Unusual Eocene Invertebrate Fossils Found in Oceanside

Specialized Information

Paleontology Collection Database

Research Explorations

Agua Verde–Punta Mechudo Expedition of 2003

Geology

Faults and Earthquakes in San Diego County
Geologic History in our Backyard
Geology of San Diego County
The San Diego Formation
San Diego's Ancient Shorelines
Silent Beaches: Ancient Lake Cahuilla and its geologic setting


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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.