| original |
Middle Eocene |
|
Texas |
Elsik,W.C. Characteristic Eocene palynomorphs in the Gulf Coast, USA. |
1974 |
| details |
Claiborne |
|
Virginia |
Frederiksen,N.O. Paleogene sporomorph biostratigraphy, Northeastern Virginia. |
1979 |
| details |
Middle Miocene |
|
Massachusetts |
Frederiksen,N.O. Stratigraphic, paleoclimatic and paleobiogeographic significance of Tertiary sporomorphs from Massachusetts |
1984 |
| details |
Claiborne |
|
USA(Gulf Coast) |
Frederiksen,N.O. Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and Earliest Oligocene of the eastern Gulf Coast. |
1988 |
| details |
Middle Eocene |
|
Canada(NWT,Franklin) |
McIntyre,D.J. Pollen and spore flora of an Eocene Forest, eastern Axel Heiberg Island, NWT. (In: Tertiary Fossil Forests of the Geodetic Hills, Axel Heiberg Island, Arctic Archipelago. R.L.Christie and N.J. McMillan, editors) |
1991 |
| details |
Middle Eocene |
|
Canada(Arctic) |
Harrison,J.C. et al. Correlation of Cenozoic sequences of the Canadian Arctic Region and Greenland; Implications for the tectonic history of North America |
1999 |