| original |
Tremadocian |
|
England(Shropshire) |
Rasul,S.M. Acritarch zonation of the Tremadoc Series of the Shineton Shales, Wrekin, Shropshire, England. |
1979 |
| details |
Caradocian |
|
England(Shropshire) |
Turner,R.E. Reworked acritarchs from the type section of the Ordovician Caradoc series. Shropshire. |
1982 |
| details |
Tremadocian |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |
| details |
Early Ordovician |
|
England |
Sarjeant,W.A.S. et al. The Micrhystridium and Veryhachium Complexes (Acritarcha: Acanthomorphitae and Polygonomorphitae): A taxonomic reconsideration. |
1994 |
| details |
Early Tremadocian |
|
England(Cumberland) |
Cooper,A.H. et al. The stratigraphy, correlation, provenance and palaeogeography of the Skiddaw Group (Ordovician) in the English Lake District |
1995 |
| details |
Nd |
|
Nd |
Martin,F. Systematic revision of the acritarch Ferromia Pellita and its bearing on Lower Ordovician stratigraphy |
1996 |
| details |
Caradocian |
Wenlockian |
Nepal |
Sinha,H.N. et al. Record of Prolific and Indubitable acritarchs from the Lower Paleozoic strata of the Tethyan Garhwal Himalaya and age implication |
1996 |