| details |
Early Tertiary |
|
Atlantic Ocean |
Graham,A. Origin and evolution of the biota of southeastern North America. |
1964 |
| details |
Miocene |
|
Arizona |
Nations,J.D. Palaeontology, paleoecology, and depositional history of the Miocene-Pliocene Verde Formation, Yavapoi County, Arizona. |
1981 |
| details |
Early Pliocene |
Middle Pliocene |
Alaska |
Ager,T.A. et al. Pliocene terrace gravels of the ancestral Yukon River near Circle Alaska; Palynology, paleobotany, paleoenvironmental reconstruction and region correlation. (In: Tertiary Quaternary Boundaries. T.A. Ager et al, editors) |
1994 |