original |
Lutetian |
|
California |
Frederiksen,N.O. Middle Eocene palynomorphs from San Diego, California. Part II: Angiosperm pollen and miscellanea. |
1983 |
original |
Late Paleocene |
|
California |
Frederiksen,N.O. Late Paleocene and Early Eocene sporomorphs and thermal alteration of organic matter in the Santa Susana Formation, Southern California. (In: Cenozoic geology of the Simi Valley area Southern California -R.R.Squires and M.V.Filewicz, editors) |
1983 |
original |
Claiborne |
|
USA(Gulf Coast) |
Frederiksen,N.O. Sporomorph biostratigraphy, floral changes, and paleoclimatology, Eocene and Earliest Oligocene of the eastern Gulf Coast. |
1988 |