| details |
Middle Tremadocian |
Late Tremadocian |
Italy(Sardinia) |
Pittau Demelia,P. et al. The signifance of acritarch stratigraphy of the Paleozoic succession of Sardinia. |
1982 |
| details |
Late Cambrian |
Early Ordovician |
France(Vosges) |
Reitz,E. et al. Late Cambrian to Early Ordovician acritarchs from the Ville Unit, Northern Vosges Mountains, (France). |
1989 |
| details |
Tremadocian |
Early Arenigian |
Italy(Sardinia) |
Pittau Demelia,P. Tremadocian (Early Ordovician) acritarchs of the Arburese Unit southwest Sardinia, (Italy). |
1985 |
| details |
Late Tremadocian |
Early Arenigian |
Italy(Sardinia) |
Barca,S. et al. Discovery of Lower Ordovician acritarchs in the "Postgotlandiano' sequence of southwestern Sardinia (Italy)-Age and tectonic implications |
1981 |
| details |
Early Cambrian |
|
Romania |
Olaru,L. et al. The age of epimetamorphic formations of the Rusai Zone, (from the Bistrite Mountains) based on spore-protistologic analysis. |
1979 |
| details |
Tremadocian |
|
France(Lot-et-Garonne) |
Baudelot,S. et al. Paleozoic basins hidden under the Aquitaine: Micropaleontological study of core collected during petroleum investigations. (In: Program of deep geology of France first phase of investigation-1983-1984) |
1984 |
| details |
Late Cambrian |
|
Belgium |
Martin,F. Cambrian-Ordovician acritarchs of the Massif du Brabant, Belgium. |
1975 |
| details |
Tremadocian |
|
Italy(Sardinia) |
Albani,R. et al. New palynological data and geological considerations on the age of the Solanas Sandstone (Cambrian-Ordovician-Central Sardinia) |
1985 |
| details |
Late Tremadocian |
|
USSR(Kostroma) |
Aristova,K.E. Acritarchs of Tremadoc-Arenig boundary Beds of the Moscow Synclise. (In: Palinologicheskie issledovaniya Proterozoya i Fanerozoya neftegazonoshykh. T.V. Byvsheva, editor.) |
1980 |
| details |
Early Llanvirnian |
|
England(Cumberland) |
Arthurton,R.S. et al. Ordovician and Silurian. (In: Geology of the Country around Penrith.) |
1981 |
| details |
Tremadocian |
|
Italy(Sardinia) |
Barca,S. et al. New geological and stratigraphical data and discovery of Lower Ordovician acritarchs in the San Vito Sandstone of the Genn'Argiolas Unit (Sarrabus, Southeastern Sardinia) |
1989 |
| details |
Tremadocian |
|
China(Shanghai) |
Hu,Y. Micropalaeoflora from the Early Ordovician in Gaoqiao Region of Shaanxi and its stratigraphic significance. |
1986 |
| details |
Tremadocian |
|
Austria |
Reitz,E. et al. Palynological evidence for Lower Ordovician rocks (Tremadoc and Arenig) in the northern Greywacke zone (Eastern Alps) |
1992 |
| details |
Ordovician |
|
Poland |
Jagielska,L. Flora of the Ordovician;Microflora |
1972 |
| details |
Tremadocian |
|
Italy(Sardinia) |
Barca,S. et al. Dating the uppermost part of the Cabitza Formation (southwest Sardinia, Italy) as Ordovician rather than Cambrian, due to the presence of Dictyonema flabelliforme and acritarchs; Geodynamic implications. |
1987 |
| details |
Early Tremadocian |
|
Algeria |
Combaz,A. A microbiota of the Tremadocian in a drilling of Hassi-Messaoud. |
1967 |
| details |
Tremadocian |
|
Algeria |
Combaz,A. On a microbiota of Tremadocian age at Hassi-Messaoud. |
1967 |