| details |
Maestrichtian |
Paleocene |
Texas |
Kumar,A. Palynological study of the sediments across the K/T Boundary in Texas, USA. |
1992 |
| details |
Lutetian |
|
California |
Frederiksen,N.O. Middle Eocene palynomorphs from San Diego, California. Part II: Angiosperm pollen and miscellanea. |
1983 |
| details |
Early Campanian |
|
New Mexico |
Jameossanaie,A. Palynology and age of South Hospah coal-bearing deposits, McKinley County, New Mexico. |
1987 |
| original |
Late Paleocene |
|
Texas |
Nichols,D.J. et al. On Arecipites Wodehouse, Monocolpopollenites Thomson and Pflug, and the species "Monocolpopollenites tranqillus". |
1973 |