| details |
Middle Riphean |
|
England |
Timofeev,B.V. et al. Acritarchs of the Precambrian in Mobile Zones. |
1980 |
| original |
Middle Riphean |
|
Spain |
Choubert,G. et al. The Precambrian in North Peri-Atlantic and South Mediterranean Mobile zones; General results. (In: The Precambrian in Mobile Zones.) |
1980 |
| details |
Charnian |
|
England |
Peat,C.J. Comments on some of Britian's oldest microfossils |
1984 |
| details |
Longmyndian |
|
England |
Peat,C.J. Comments on some of Britian's oldest microfossils |
1984 |
| details |
Nd |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |