| details |
Middle Siegenian |
Late Siegenian |
W.Germany(N.Rhine) |
Volkmer,U. Palynology of the Early Devonian, (Siegenian - Emsian), in the eastern Rhineland. |
1984 |
| details |
Middle Siegenian |
Late Siegenian |
W.Germany(Rhineland) |
Volkmer,U. Spore stratigraphy of the Lower Devonian, (Siegenian - Emsian) within the Southern Bergisches Land (Rhenish Massif). |
1985 |
| details |
Late Siegenian |
|
W.Germany(N.Rhine) |
Volkmer,U. Palynology of the Odenspiel Beds at the Siegenian type Region (Bergisches Land/ Siegerland) of the Lower Devonian |
1988 |