(Last updated 4 Aug 2022)
| Era: | Period: (age range) |
Subjects: | Last updated: |
| Cenozoic Era |
Quaternary Period: (today to 1.8 mya) |
Holocene
epoch (all) Pleistocene epoch (all) |
June 19, 2008 July 11, 2010 |
| Neogene Period: (.05 to 23 mya) |
Pliocene
epoch (all) Miocene epoch (all) |
Aug 17, 2010 Aug 17, 2010 |
|
| Paleogene Period: (23 to 65 mya) |
Oligocene
epoch (all) Eocene epoch (all) Paleocene epoch (all) |
Aug 19, 2008 Aug 17, 2010 June 21, 2008 |
|
| Mesozoic Era |
Cretaceous Period: (65 to 145 mya) |
1. Mammals 2. Birds 3. Reptiles (terrestrial) 4. Reptiles (marine) 5. Amphibians 6. Shark 7. Fish 8. Ammonites 9. Nautiloids 10. Crustaceans 11. Echinoids 12. Crinoids 13. Asteroids (starfish) 14. Gastropods 15. Bivalves 16. Brachiopods 17. Rudists 18. Foramifera 19. Ostracoda 20. Corals (and jellyfish) 21. Plants, algae, spores 22. Geology |
|
| Jurassic Period (145 to 199 mya) |
All References | ||
| Triassic Period (200 to 252 mya) |
All References | ||
| Paleozoic Era |
Permian Period: (252 to 299 mya) |
1. Sharks 2. Fish 3. Ammonoids 4. Nautiloids 5. Crustaceans 6. Trilobites 7. Echinoids (urchins) 8. Crinoids 9. Brachiopods 10. Bivalves (clams, oysters) 11. Gastropods (snails) 12. Corals 14. Fusulinids 15. Plants 16. Geology and general paleontology 17. Alfred Romer papers |
1. May 5, 2009 2. May 5, 2009 3. Oct. 12, 2008 4. Oct. 12, 2008 5. Oct. 12, 2008 6. May 5, 2009 7. Oct. 24, 2009 8. Oct. 24, 2009 9. Aug. 12, 2010 10. Dec. 11, 2010 11. Dec. 11, 2010 12. Aug. 12, 2010 14. Aug. 12, 2010 15. July 10, 2010 16. Aug. 12, 2010 17. Aug. 12, 2010 |
| Pennsylvanian Period: (299 to 320 mya) |
1. Sharks 2. Fish 3. General shark & fish 5. Amphibians 6. Ammonoids 7. Nautiloids 8. Scaphopods 9. Crustaceans 10. Trilobites 11. Conodonts 12. Echinoids (urchins) 13. Crinoids 14. Asteroids (starfish) 15. Blastoids 16. Brachiopods 17. Bivalves (clams, oysters) 18. Gastropods (snails) 19. Corals 20. Sponges 21. Fusulinids 22. Foraminifera 23. Plants 24. Palynology 25. Algae 26. Geology |
1. Dec. 11, 2010 2. Dec. 11, 2010 3. Dec. 11, 2010 5. Sep. 28, 2008 6. July 10, 2010 7. July 10, 2010 8. July 10, 2010 9. Aug. 12, 2010 10. Aug. 12, 2010 11. May 30, 2008 12. July 10, 2010 13. July 10, 2010 14. July 10, 2010 15. July 10, 2010 16. Aug. 17, 2010 17. Dec. 11, 2010 18. Dec. 11, 2010 19. July 10, 2010 20. July 10, 2010 21. July 10, 2010 22. July 10, 2010 23. July 10, 2010 24. Feb. 1, 2010 25. July 10, 2010 26. Feb. 1, 2010 |
|
| Mississippian Period: (320 to 359 mya) |
|||
| Devonian Period: (359 to 416 mya) |
All References | Aug. 17, 2010 | |
| Ordovician Period: (443 to 490 mya) |
All References |
Jan. 22, 2010 | |
| Cambrian Period: (490 to 543 mya) |
All References | Jan. 30, 2010 |
| Era: | Periods: | North America only. |
Last updated |
| Cenozoic Era |
Pleistocene Period (0 - 2.5 mya) |
June 1, 2009 | |
| Mesozoic Era |
Cretaceous Period (65-145 mya) |
Oct. 12, 2009 | |
| Paleozoic Era |
Permian Period (252-299 mya) |
Oct. 25, 2009 | |
| Carboniferous Period |
Pennsylvanian (299-318 mya) |
Jan. 20, 2009 | |
| Mississippian (318-359 mya) |
Jan. 20, 2009 | ||
| Devonian Period (359-416 mya) |
Sep. 19, 2009 | ||
| Silurian Period (416-443 mya) |
Jan. 20, 2009 | ||
| Ordovician Period (443-490 mya) |
Jan. 21, 2009 | ||
| Cambrian Period (490-543 mya) |
Sep. 19, 2009 |