| original |
Cenomanian |
|
Minnesota |
Pierce,R.L. Lower Upper Cretaceous plant microfossils from Minnesota. |
1961 |
| details |
Late Cretaceous |
|
Minnesota |
M¤dler,K.A. Remarks on the nomenclature of Mesozoic spores |
1962 |
| details |
Nd |
|
Nd |
Skarby,A. Revision of Gleicheniidites senonicus Ross. |
1964 |
| details |
Middle Jurassic |
Early Tertiary |
Eurasia |
Bolkhovitina,N.A. The spores of the Family Gleicheniaceae ferns and their importance for the stratigraphy |
1968 |
| original |
Albian |
|
Canada(Alberta) |
Brideaux,W.W. Palynology of the Lower Colorado Group (Late Lower Cretaceous) and its lithological equivalents in central and west-central Alberta, Canada. |
1968 |