| details |
Zechstein |
|
Switzerland |
Potonie,R. Synopsis of the genera of the sporae dispersae. Part 2 |
1958 |
| details |
Zechstein |
|
W.Germany(N.Rhine) |
Grebe,H. et al. The sporae dispersae of the Niederrhein Zechstein. |
1962 |
| details |
Ufimian |
|
W.Germany(Hesse) |
Grebe,H. et al. The spore dispersae of the Lower Rhine Zechstein. (In: Palaobotanic, coal-petrographic and geochemical contribution to stratigraphy and coal genesis.) |
1964 |
| original |
Middle Zechstein |
|
W.Germany(Hesse) |
Leschik,G. Spores from the Salt Clay of the Zechstein of Neuhof (Near Fulda). |
1956 |