| details |
Late Devonian |
|
Ohio |
Kidston,R. et al. On the presence of tetrads of resistant spores in the tissue of Sporocarpon furcatum Dawson from the Upper Devonian of America. |
1935 |
| details |
Early Cretaceous |
Tertiary |
Canada(Ontario) |
Rouse,G.E. The Disclosure and paleobotanical evaluation of plant microfossils from selected Cretaceous Coal-bearing strata of Canada |
1956 |
| details |
Devonian |
|
Nd |
Radforth,N.W. et al. Floral transgression of major geological time zones. |
1956 |
| details |
Early Cretaceous |
|
Nd |
Radforth,N.W. et al. Floral transgression of major geological time zones. |
1956 |
| details |
Tertiary |
|
Nd |
Radforth,N.W. et al. Floral transgression of major geological time zones. |
1956 |