| original |
Tertiary |
|
India(Assam) |
Sen,J. Microfossils of Assam Coal-Fields-I. The Coal Seam at Laitryngew and the age of the Cherra Sandstone. |
1948 |
| original |
Frasnian |
|
Belgium |
Dricot,E.M. Observations on the Frasnian acritarchs of Belgium. |
1965 |
| original |
Early Chesterian |
Middle Chesterian |
Oklahoma |
Harris,R.W. Palynology of the Sand Branch Member of the Caney Shale Formation, (Mississippian), of Southern Oklahoma. |
1971 |
| original |
Chesterian |
|
Oklahoma |
Wiggins,V.D. Palynomorph fossils from the Goddard Formation (Mississippian) of Southern Oklahoma |
1962 |