| details |
Arenigian |
Gedinnian |
Nd |
Diez,M.D.C.R. et al. Range chart of selected Lower Paleozoic acritarch Taxa. 2: Index to Parts 1 and 2. |
1977 |
| details |
Tremadocian |
Late Arenigian |
Morocco |
Swain,F.M. Notes on Paleozoic acritarchs from the Atlantic Margins. (In: Stratigraphic Micropaleontology of Atlantic Basin and Borderlands. F.M.Swain, editor) |
1977 |
| details |
Late Llandoverian |
Middle Gedinnian |
Nd |
Cramer,F.H. et al. Acritarchs. |
1977 |
| details |
Silurian |
|
Turkey |
Erkmen,U. Acritarch biofacies of Bedinan Formation in southeastern Anatolia and its paleogeographical interpretation. |
1978 |
| details |
Late Llandoverian |
Ludlovian |
Turkey |
Erkmen,U. et al. Acritarchs from the Dadas Formation in Southeast Turkey. |
1979 |
| details |
Late Arenigian |
Early Llanvirnian |
Bulgaria |
Kalvacheva,R.K. Palynological evidence (acritarcha) for the age of the Lower Paleozoic rocks in the Vakarel Hill, Bulgaria. |
1979 |
| details |
Early Paleozoic |
|
Nd |
Cramer,F.H. et al. Lower Paleozoic acritarchs. |
1979 |
| details |
Late Llandoverian |
Early Wenlockian |
Italy(Sardinia) |
Del Rio,M. et al. Silurian acritarchs of the Paleozoic succession of Domusnovas, (southwest Sardinia). |
1979 |
| details |
Late Arenigian |
Early Llanvirnian |
Bulgaria |
Kalvacheva,R.K. Upper Arenigian to Lower Llanvirnian acritarchs from West Sredna Gora Mountain, Bulgaria. |
1980 |
| details |
Early Llandoverian |
Middle Llandoverian |
Spain |
Hafenrichter,M. The lower and upper boundary of the Ordovician system of some selected regions, (Celtiberia, Eastern Sierramorena) in Spain. Part 2. The Ordovician/Silurian bounday in Spain. |
1980 |
| details |
Late Ordovician |
Early Gothlandian |
Ghana |
Bar,P. et al. Latest Ordovician to Earliest Silurian microfloras from the Lower Sekondian Series of Ghana, (West Africa), and their relationship to those from the Itaim Formation of the Maranhao Basin in Northeast Brazil. |
1980 |
| details |
Middle Gothlandian |
|
New York |
Tappan,H. The Paleobiology of Plant Protists. |
1980 |
| details |
Middle Gothlandian |
|
New York |
Tappan,H. The Paleobiology of Plant Protists. |
1980 |
| details |
Ludlovian |
|
Turkey |
Fontaine,J.-M. et al. New contributions on the stratigraphy of Paleozoic formations of the Arab Platform in the Hazro Region of Turkey. |
1980 |
| details |
Late Ludlovian |
|
Guinea |
Baudelot,S. et al. Presence of microplankton from Upper Ludlovian in the locality of Tomboya, (Gunea) |
1980 |
| details |
Downtonian |
|
Libya |
Richardson,J.B. et al. Acritarchs, miospores and correlation of the Ludlovian - Downtonian and Silurian - Devonian boundaries. |
1981 |
| details |
Downtonian |
|
USSR |
Richardson,J.B. et al. Acritarchs, miospores and correlation of the Ludlovian - Downtonian and Silurian - Devonian boundaries. |
1981 |