| original |
Middle Turonian |
Early Campanian |
North Carolina |
Christopher,R.A. et al. Late Cretaceous Polynomorphs from the Cape Fear Formation of North Carolina. |
1979 |
| original |
Late Santonian |
|
Maryland |
Christopher,R.A. Cretaceous pollen. (In: Geology of the Round Bay Quadrangle, Anne Arundel County, Maryland. J.P. Minard) |
1980 |
| original |
Early Santonian |
Middle Santonian |
USA(Atlantic Coast.Pl.) |
Christopher,R.A. Palynostratigraphy of the Basal Cretaceous units of the eastern Gulf and Southern Atlantic Coastal Plains. (In: Symposium on the Geology of the Southeastern Coastal Plain, Proceedings, 2nd. D.D. Arden et al editors) |
1982 |