| details |
Ludlovian |
Emsian |
Bolivia |
Kimyai,A. Paleozoic Microphyloplankton from South America |
1983 |
| details |
Llandeilian |
|
Wales |
Trythall,R.J.B. et al. Age and controls of Ironstone deposition (Ordovician) North Wales. |
1987 |
| details |
Caradocian |
|
Czech Republic |
Wang,W.-M. Paleofloristic and paleoclimatic implications of Neogene palynofloras in China |
1994 |
| details |
Ashgillian |
|
Oklahoma |
Wang,W.-M. Paleofloristic and paleoclimatic implications of Neogene palynofloras in China |
1994 |
| details |
Ludlovian |
|
Bolivia |
Rubinstein,C.V. Silurian acritarchs from South America: A review. |
1996 |