| details |
Late Givetian |
Frasnian |
Iowa |
Playford,G. et al. Laiphospora, a new genus of Trilete sporae dispersae from the Devonian of North America. |
1983 |
| details |
Middle Frasnian |
|
Canada(NWT,Mackenzie) |
Playford,G. et al. Laiphospora, a new genus of Trilete sporae dispersae from the Devonian of North America. |
1983 |
| details |
Late Frasnian |
|
Iowa |
Wicander,R. et al. Acritarchs and spores from the Upper Devonian Lime Creek Formation, Iowa, USA. |
1985 |
| details |
Late Givetian |
Early Frasnian |
Canada(Alberta) |
McGregor,D.C. et al. Intra-Devonian series boundaries in Canada |
1985 |
| details |
Early Frasnian |
|
Canada(Alberta) |
McGregor,D.C. et al. Intra-Devonian series boundaries in Canada |
1985 |
| details |
Early Frasnian |
|
Texas |
Barker,G.W. et al. Microplankton and spores from the Woodford Shale (Devonian) of the Tobosa Basin, southeast New Mexico-southwestern Texas, USA. |
1988 |
| details |
Late Givetian |
|
Canada(Arctic) |
Barnes,C.R. et al. Appendix 3A: Palaeontology. (In: The Geology of Devon Island North 76', Canadian Arctic Archipelago (Western part of Cardigan Strait area, Prince Alfred Bay map area and parts of adjacent maps: NT: 59A, B.C. and 69A, D. U.Mayr et al, editors) |
1998 |