| details |
Ashgillian |
Llandoverian |
Scotland(Dumfries) |
Whelan,G.M. Acritarch and chitinozoan distribution across the type Ordovician-Silurian boundary at Dobb's Linn, Scotland |
1986 |
| details |
Middle Ordovician |
Late Ordovician |
Ohio |
Schopf,J.M. et al. Acid-resistant microfossils from the Cynthiana Formation and Eden Group. |
1961 |
| details |
Middle Ordovician |
Late Ordovician |
Kentucky |
Schopf,J.M. et al. Acid-resistant microfossils from the Cynthiana Formation and Eden Group. |
1961 |
| details |
Middle Llandeilian |
Late Caradocian |
Canada(Quebec) |
Achab,A. Successions of chitinozoan and graptolites assemblages in some units of the Middle Ordovician of Quebec. |
1984 |
| details |
Late Emsian |
Eifelian |
USSR(Latvian SSR) |
Nenasteva,V.E. Spores. Lower and Middle Devonian of Latvia. (In: Devon i Karbon Pribaltiki. V.S.Sorokin et al, editors) |
1981 |
| details |
Tremadocian |
Early Wenlockian |
S.Ireland(Tipperary) |
Colthurst,J.R.J. et al. Palaeontological evidence for the age of the Lower Palaeozoic rocks of the Slievenamon Inlier, County Tipperary. |
1977 |
| details |
Late Famennian |
Early Tournaisian |
Pennsylvania |
Traverse,A. Plant microfossils help date rocks of questionable age. |
1974 |
| details |
Late Ludlovian |
Early Siegenian |
Spain |
Rodriguez,R.M. New miospores of the San Pedro Formation of Geras de Gordon, Cantabrica Cordillera (Leon Province, northeast Spain). |
1978 |
| details |
Late Ashgillian |
Early Llandoverian |
South Africa |
Gray,J. et al. Age of the Cedarberg Formation, South Africa and early land plant evolution. |
1986 |
| details |
Late Frasnian |
Early Famennian |
England |
Chaloner,W.G. et al. Southeast England. (In: A Correlation of Devonian Rocks of the British Isles. M.R.House et al, authors) |
1977 |
| details |
Late Frasnian |
Early Famennian |
Belgium |
Stockmans,F. et al. Acritarchs of the "Tranchee de Senzeille" (Upper Frasnian and Lower Famennian). |
1974 |
| details |
Ludlovian |
Early Downtonian |
Wales(Carmarthenshire) |
Richardson,J.B. et al. Upper Silurian and Lower Devonian spore assemblages from the Welsh Borderland and South Wales |
1969 |
| details |
Middle Arenigian |
Early Ashgillian |
France |
Paris,F. Chitinozoan Biostratigrphy in the Ordovican of South-West Europe |
1980 |
| details |
Middle Arenigian |
Early Ashgillian |
Spain |
Paris,F. Chitinozoan Biostratigrphy in the Ordovican of South-West Europe |
1980 |
| details |
Middle Arenigian |
Early Ashgillian |
Portugal |
Paris,F. Chitinozoan Biostratigrphy in the Ordovican of South-West Europe |
1980 |
| details |
Late Caradocian |
Early Ashgillian |
Saudi Arabia |
Caputo,M.V. et al. Migration of glacial centers across Gondwana during Paleozoic Era |
1985 |
| details |
Aptian |
Early Albian |
Egypt |
Schrank,E. Cretaceous pollen and spores from the "Nubian Sandstone" of Dakhla-Beckens (Egypt). |
1982 |