 |
EncyclopediaGeologic Timescale| Era | Period | Epoch | Approximate duration | Approximate number of years ago |
|---|
| Cenozoic | Quaternary | Holocene | 10,000 years ago to the present | | | Pleistocene | 2 | .01 | | Tertiary | Pliocene | 11 | 2 | | Miocene | 12 | 13 | | Oligocene | 11 | 25 | | Eocene | 22 | 36 | | Paleocene | 71 | 58 | | Mesozoic | Cretaceous | | 71 | 65 | | Jurassic | | 54 | 136 | | Triassic | | 35 | 190 | | Paleozoic | Permian | | 55 | 225 | | Carboniferous | | 65 | 280 | | Devonian | | 60 | 345 | | Silurian | | 20 | 405 | | Ordovician | | 75 | 425 | | Cambrian | | 100 | 500 | | Precambrian1 | | | >4,000 | 600 | 1 Not an era but the time preceding the Cambrian. The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on Geologic Timescale table from Infoplease:
- Permian period - Permian period Permian period [from Perm, Russia], sixth and last period of the Paleozoic era (see ...
- epoch - epoch epoch, unit of geologic time that is a subdivision of a period. The Pleistocene and Holocene ...
- Carboniferous period - Carboniferous period Carboniferous period , fifth period of the Paleozoic era of geologic time (see ...
- Cretaceous period - Cretaceous period Cretaceous period , third and last period of the Mesozoic era of geologic time ...
- Pleistocene epoch - Pleistocene epoch Pleistocene epoch , 6th epoch of the Cenozoic era of geologic time (see Geologic ...
|
|
