| details |
Ordovician |
|
USSR(Russian Platform) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Middle Cambrian |
Late Cambrian |
USSR(Pre-Baltic) |
Umnova,N.I. Ordovician and Silurian acritarchs of the Moscow Basin and Prebaltic |
1975 |
| details |
Tremadocian |
|
England |
Warrington,G. et al. Micropalaeontological biostratigraphy of offshore samples from South-West Britain. |
1977 |
| details |
Tremadocian |
|
Wales(Carmarthenshire) |
Tappin,D.R. et al. New Tramadoc strata at outcrop in the Bristol Channel. |
1978 |
| details |
Tremadocian |
Early Llanvirnian |
Ireland(Isle Of Man) |
Molyneux,S.G. New evidence for the age of the Manx Group, Isle of Man. |
1979 |
| details |
Late Arenigian |
|
England(Cumberland) |
Arthurton,R.S. et al. Ordovician and Silurian. (In: Geology of the Country around Penrith.) |
1981 |
| details |
Early Cambrian |
Middle Cambrian |
Romania |
Dimitrescu,R. Early Caledonian event in the Pre-Alpine metamorphic sequences the Romanian Carpathians |
1985 |
| details |
Nd |
|
Nd |
Albani,R. Ordovician, (Arenigian) acritarchs from the Solanas Sandstone Formation, Central Sardinia, Italy. |
1989 |
| details |
Middle Cambrian |
Late Cambrian |
USSR(Pre-Baltic) |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |