Geologic Column"mya" means millions of years | ||||
|---|---|---|---|---|
Eon | Era | Period | Epoch | Begins |
Phanerozoic | Cenozoic | Quaternary | Recent | ~1 mya |
| Pleistocene | 2 mya | |||
| Tertiary | Pliocene | 5 mya | ||
| Miocene | 24 mya | |||
| Oliogocene | 37 mya | |||
| Eocene | 58 mya | |||
| Paleocene | 65 mya | |||
Mesozoic |
Cretaceous | 144 mya | ||
| Jurassic | 208 mya | |||
| Triassic | 250 mya | |||
Paleozoic |
Permian | 286 mya | ||
| Carboniferous | Pennsylvanian | 320 mya | ||
| Mississippian | 360 mya | |||
| Devonian | 408 mya | |||
| Silurian | 438 mya | |||
| Ordovician | 505 mya | |||
| Cambrian | 600 mya | |||
Proterozoic |
Precambrian |
2500 mya | ||
Archaen |
3800 mya | |||
Hadean | 4600 mya | |||
Visit the Interactive Geological Column from the University of California Museum of Paleontology.
First time users of the UCMP site may find instructions on navigating the site an easier place to start.
Other Geologic Illustrations...Standard rock symbols | Ordovician fossils | Silurian fossils | Devonian fossils | Mississippian fossils | Pennsylvanian fossils | Illinois top of rocks map | LaSalle and Kanakakee geological column | LaSalle area cross-section | Northern Illinois top of rocks mapIllinois Geology - Useful Publications. | |
Travel back in time...
William Alden's 1902 Chicago Folio |
Learn Paleozoic fossils...
Read my First Families of Chicago |
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Visit my Homepage or Email me
Ellin Beltz / ebeltz@ebeltz.net
March 5, 2006
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