| original |
Clintonian |
|
Pennsylvania |
Strother,P.K. A classification Schema for the Cryptospores |
1991 |
| details |
Late Wenlockian |
Early Ludlovian |
Scotland(Tayside) |
Wellman,C.H. A land plant microfossil assemblag of Middle Silurian age from the Stonehaven Group, Scotland. |
1993 |
| details |
Clintonian |
|
Pennsylvania |
Steemans,P. et al. Ordovician and Silurian cryptospores and miospores from southeastern Turkey. |
1996 |
| details |
Nd |
|
Nd |
Steemans,P. et al. Ordovician and Silurian cryptospores and miospores from southeastern Turkey. |
1996 |