| original |
Ludlovian |
Early Gedinnian |
Spain |
Cramer,F.H. Palynomorphs from the Siluro-Devonian boundary in northwest Spain |
1966 |
| details |
Silurian |
Devonian |
Spain |
Cramer,F.H. Palynology of Silurian and Devonian rocks in northwest Spain. |
1966 |
| details |
Late Ludlovian |
|
Spain |
Cramer,F.H. Palynology of Silurian and Devonian rocks in northwest Spain. |
1966 |
| details |
Middle Gothlandian |
Late Gothlandian |
Spain |
Cramer,F.H. et al. Taxonomic considerations on the acritarchs of the Middle and Upper Silurian of northern Spain. |
1968 |
| details |
Llandoverian |
|
Alabama |
Cramer,F.H. Paleographic considerations with regard to a microplanctonic association of the Gothlandian series of Birmingham, (Alabma, USA) |
1968 |
| details |
Late Llandoverian |
Early Gedinnian |
Spain |
Cramer,F.H. Consideration on the palynology and Silurian paleolatitudes based on microplankton of the Cantabrian Mountains of the Northwest of Spain. |
1969 |
| details |
Early Gothlandian |
|
Pennsylvania |
Cramer,F.H. Possible implications for Silurian paleogeography from phytoplankton assemblages of the Rose Hill and Tuscarora Formations of Pennsylvania. |
1969 |
| details |
Silurian |
|
USA |
Cramer,F.H. et al. North American Silurian palynofacies and their spatial arrangement. |
1972 |
| details |
Ludlovian |
Gedinnian |
Algeria |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |
| details |
Ludlovian |
Gedinnian |
Spain |
Jardin©,S. Microplankton (Acritarchs), and the stratigraphic limits of the Upper Silurian to Upper Devonian. |
1972 |
| details |
Ludlovian |
|
Algeria |
Jardin©,S. et al. Stratigraphic distribution of acritarchs in the Palaeozoic of the Algerian Sahara. |
1974 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Wenlockian |
Ludlovian |
Algeria |
Downie,C. Devonian acritarchs. (In: The Devonian System. M.R. House et al, editors) |
1979 |
| details |
Ludlovian |
Early Gedinnian |
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |