| details |
Early Frasnian |
|
Texas |
Barker,G.W. et al. Microplankton and spores from the Woodford Shale (Devonian) of the Tobosa Basin, southeast New Mexico-southwestern Texas, USA. |
1988 |
| details |
Early Devonian |
|
Tennessee |
Reaugh,A.B. et al. Acritarchs and chitinozoans from the Lower Devonian (Helderbergian) Birdsong Shale, Decatur County, Tennessee. |
1977 |
| details |
Dinantian |
|
Ireland |
Smith,D.G. Progress in Irish Lower Palaeozoic palynology. |
1981 |
| details |
Caradocian |
|
New York |
Jacobson,S.R. Acritarch biostratigraphy of Middle and Late Ordovician Carbonate rocks of the Trenton Group, New York, and equivalent strata in the Cincinnati region. |
1977 |
| details |
Cambrian |
Permian |
Europe |
Dorning,K.J. Paleozoic marine Shelf acritarchs |
1984 |
| details |
Cambrian |
Permian |
North America |
Dorning,K.J. Paleozoic marine Shelf acritarchs |
1984 |
| details |
Arenigian |
|
Wales |
Downie,C. et al. Changes in the acritarch assemblages at the Tremadoc boundaries in the United Kingdom. |
1979 |