Geologic Time

Here are useful references if you wish to explore more about Earth’s deep past, and a geologic timeline so you can consider each sign of the sea around you within the grand sweep of Earth’s history.

Geologic Time
© Smithsonian Ocean: Our Water Our World

References for Further Exploration
The National Museum of Natural History, Smithsonian, Department of Paleontology, History of Geologic Time

University of California Museum of Paleontology Tour of Geologic Time

The Paleontology Portal

Maps of ancient seas overlaid on contemporary landscape from Ron Blakey (Northern Arizona University)
Blakey home page
Map Table of contents