| details |
Late Pennsylvanian |
Early Permian |
Kansas |
Nygreen,P.W. et al. Palynological aspects of the Pennsylvanian-Permian boundary of the South Central United States. |
1962 |
| details |
Late Pennsylvanian |
Early Permian |
Oklahoma |
Nygreen,P.W. et al. Palynological aspects of the Pennsylvanian-Permian boundary of the South Central United States. |
1962 |
| details |
Late Pennsylvanian |
Early Permian |
Texas |
Nygreen,P.W. et al. Palynological aspects of the Pennsylvanian-Permian boundary of the South Central United States. |
1962 |
| details |
Early Cretaceous |
|
Texas |
Kessler,L.G.I. Palynomorph distribution and depositional environments in the Glen Rose Formation (Lower Cretaceous) Somervell County, Texas. |
1968 |
| details |
Cretaceous |
|
Nd |
Lidgard,S. et al. Angiosperm diversification and Cretaceous floristic trends; a comparison of palynofloras and Leaf Macrofloras |
1990 |