| link
|
From
|
To
|
Geolocation
|
Author - title
|
Year
|
|---|---|---|---|---|---|
| details | Late Llandoverian | Early Ludlovian | United Kingdom | Downie,C. Acritarchs in British stratigraphy | 1984 |
| details | Wenlockian | England | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 | |
| details | Hirnantian | Aeronian | Norway | Smelror,M. et al. Upper Ordovician-Lower Silurian strata and biota from offshore South Norway | 1997 |