| details |
Early Bringewoodian |
Late Downtonian |
England |
Aldridge,R.J. et al. Microfossil distribution in the Silurian of Britian and Ireland. |
1979 |
| details |
Early Bringewoodian |
Late Downtonian |
Ireland |
Aldridge,R.J. et al. Microfossil distribution in the Silurian of Britian and Ireland. |
1979 |
| details |
Ludlovian |
Gedinnian |
Czechoslovakia |
Ivanicka,J. et al. Results of biostratigraphical study in part of Gelnica Group. |
1989 |
| details |
Ludlovian |
Gedinnian |
Czechoslovakia |
Ivanicka,J. et al. Results of biostratigraphical study in part of Gelnica Group. |
1989 |
| details |
Ludlovian |
Gedinnian |
Libya |
Tekbali,A.O. et al. Silurian spores, acritarchs and chitinozoans from the Bani Walid Borehole of the Ghadamis Basin, Northwest Libya. (In: The Geology of Libya. M.J.Salem et al, editors) |
1991 |
| details |
Late Gorstian |
Early Downtonian |
Northern Hemisphere |
Richardson,J.B. et al. Silurian and Devonian spore zones of the Old Red Sandstone continent and adjacent regions. |
1986 |
| details |
Late Ludlovian |
Downtonian |
England |
Richardson,J.B. et al. Acritarchs, miospores and correlation of the Ludlovian - Downtonian and Silurian - Devonian boundaries. |
1981 |
| details |
Late Ludlovian |
Downtonian |
Wales |
Richardson,J.B. et al. Acritarchs, miospores and correlation of the Ludlovian - Downtonian and Silurian - Devonian boundaries. |
1981 |
| original |
Middle Ludlovian |
Downtonian |
Wales(Carmarthenshire) |
Richardson,J.B. et al. Upper Silurian and Lower Devonian spore assemblages from the Welsh Borderland and South Wales |
1969 |
| details |
Ludlovian |
Downtonian |
England |
Richardson,J.B. The stratigraphic utilization of some Silurian and Devonian miospore species in the Northern Hemisphere. |
1974 |
| details |
Ludlovian |
Downtonian |
Wales |
Richardson,J.B. The stratigraphic utilization of some Silurian and Devonian miospore species in the Northern Hemisphere. |
1974 |
| details |
Early Devonian |
|
China(Szechwan) |
Xiang,L. et al. Early Devonian graptolite-bearing formation and its paleontological features at Baoxing County, Sichuan, (Szechwan). |
1975 |
| details |
Lochkovian |
|
France(Mayenne) |
d'Erceville,M.A. Spores from Silurian-Devonian formations from a cutting at Saint-Pierre-sur-Erve (Synclinorium Median Armorcain). |
1979 |
| details |
Downtonian |
|
Libya |
Richardson,J.B. et al. Acritarchs, miospores and correlation of the Ludlovian - Downtonian and Silurian - Devonian boundaries. |
1981 |
| details |
Nd |
|
England(Herefordshire) |
Richardson,J.B. et al. Silurian and Devonian spore zones of the Old Red Sandstone continent and adjacent regions. |
1986 |
| details |
Nd |
|
England(Worcestershire) |
Richardson,J.B. et al. Silurian and Devonian spore zones of the Old Red Sandstone continent and adjacent regions. |
1986 |
| details |
Ludlovian |
|
W.Germany(Bavaria) |
Pflug,H.D. et al. Palynology in metamorphic Rocks-Indication of Early land plants |
1987 |