Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Geological Time.
years
Pleistocene
Pliocene
Miocene 2,900,000 {725. 000
362. 500
362. 500
Oligocene 580. 000
Eocene 870. 000
Cretaceous
Comanche 7,240,000 {1.810. 000
1.810. 000
Jurassic 1.810. 000
Triassic 1.810. 000
Permian
Pennsylvanian
Mississippian Devonian 17,500,000 {2.625. 000
2.625. 000
1.750. 000
2.625. 000
Silurian 1.750. 000
Ordovician 2.625. 000
Cambrian 3.500. 000
Proterozoic (Huronic and
Keewenawic) 17,500. 000
Archeogric (Keewatic and
Laurentic ? 10. 000. 000
years. 55,140.000