| details |
Late Pliocene |
|
USSR(Magadan Oblast) |
Borisova,Z.K. Pliocene sediments in the Penzhina River Basin. |
1973 |
| details |
Precambriam |
|
Arizona |
Bloeser,B. et al. Chitinozoans from the Late Precambrian Chuar Group of the Grand Canyon, Arizona. |
1977 |
| details |
Late Mississippian |
|
Arizona |
Billingsley,G.H. et al. Pre-Supai buried valleys. (In: The Supai Group of Grand Canyon. E.D.McKee) |
1982 |
| details |
Middle Precambrian |
|
Canada(Ontario) |
Barghoorn,E.S. et al. Microorganisms of Middle Precambrian age from the Animikie Series, Ontario, Canada. |
1965 |