| details |
Early Cretaceous |
|
Canada(NWT,Mackenzie) |
Yorath,C.J. et al. Cretaceous and Tertiary stratigraphy and paleogeography northern Interior Plains, District of MacKenzie. |
1981 |
| details |
Frasnian |
|
Canada(NWT,Mackenzie) |
Yorath,C.J. et al. Cretaceous and Tertiary stratigraphy and paleogeography northern Interior Plains, District of MacKenzie. |
1981 |
| details |
Frasnian |
Famennian |
Canada(NWT,Mackenzie) |
Hills,L.V. et al. Megaspores, Imperial Formation (Upper Devonian) Mountain River, District of MacKenzie |
1984 |
| details |
Famennian |
|
Canada(NWT,Mackenzie) |
Hills,L.V. et al. Megaspores, Imperial Formation (Upper Devonian) Mountain River, District of MacKenzie |
1984 |
| details |
Middle Devonian |
Late Devonian |
China(Yunnan) |
Xu,R. et al. Middle and Early Upper Devonian miospore zonations in Eastern Yunnan and the significance of their stratigraphy. |
1991 |
| details |
Givetian |
|
USSR(Kazakh SSR) |
Senkevitsch,M.A. et al. On fructifications, morphology and anatomy of Givetian Lepidophytes in Kazakhstan (USSR). |
1993 |
| details |
Frasnian |
Famennian |
Nd |
Scott,A.C. et al. Paleozoic spores and pollen. Chapter 18G Palaeozoic megaspores. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |