| details |
Middle Frasnian |
|
Belgium |
Vanguestaine,M. et al. Evolution of organic debris and palynomorph preservation in two late middle Frasnian sections, southern Dinant Synclinorium border, Belgium. |
1999 |
| details |
Ordovician |
Silurian |
Baltic |
Timofeev,B.V. Phytoplankton and dispersed spores of the Ordovician, Silurian and Lower Devonian of the Baltic Region, the Gory Switokrzyskie and Podolia. |
1963 |
| details |
Late Cambrian |
|
Arkansas |
Wood,G.D. et al. Organic-walled microfossils from the Cambrian Davis Shale and Bonneterre Formation, Mid-Continent United States;Integration of palynological, geological and geophysical disciplines in the exploration of the Reelfoot Rift area |
1989 |