| details |
Maastrichtian |
Early Eocene |
Colombia |
Hammen,T.Van Der et al. Paleoclimate, stratigraphy and evolution. |
1964 |
| details |
Maastrichtian |
Early Miocene |
Colombia |
Hammen,T.Van Der et al. Climatic periodicity and evolution of South American Maestrichtian and Tertiary floras. A study based on pollen anaylsis in Colombia. |
1957 |
| details |
Maastrichtian |
Early Miocene |
Colombia |
Hammen,T.Van Der et al. Climatic periodicity and evolution of South American Maestrichtian and Tertiary floras. A study based on pollen anaylsis in Colombia. |
1957 |
| details |
Maastrichtian |
Middle Oligocene |
Colombia |
Hammen,T.Van Der et al. Palynological stratigraphy of the Sabana of Bogota (East Cordillerian of Colombia). |
1957 |
| details |
Maastrichtian |
|
Colombia |
Hammen,T.Van Der et al. Description of some genera and species of fossil pollen and spores. |
1956 |
| details |
Paleocene |
|
Guianas |
Hammen,T.Van Der et al. Paleocene sediments in British Guiana and Surinam. |
1961 |
| details |
Paleocene |
|
Surinam |
Hammen,T.Van Der et al. Paleocene sediments in British Guiana and Surinam. |
1961 |
| original |
Maestrichtian |
Late Eocene |
Colombia |
Hammen,T.Van Der et al. The development of the Colombian flora through geological period I: Maestrichtian to Lower Tertiary. |
1954 |
| details |
Paleocene |
|
Colombia |
Doubinger,J. Pollen and spores from the Paleocene Coal Basin of Cerrejon, (Guajira Province, Colombia). |
1973 |
| details |
Late Albian |
Cenomanian |
Peru |
Alverez,P.E. Palynological study of the Chonta Formation in the Ocho Block. |
1979 |