| details |
Silurian |
|
Canada(Quebec) |
Duffield,S.L. Biostratigraphy and taxonomy of Lower Silurian acritarchs from Anticosti Island,Quebec. |
1981 |
| details |
Late Cambrian |
Arenigian |
Wales |
Downie,C. et al. Changes in the acritarch assemblages at the Tremadoc boundaries in the United Kingdom. |
1979 |
| details |
Silurian |
|
Nd |
Downie,C. The geological history of the microplankton. |
1967 |
| details |
Late Cambrian |
Early Permian |
Nd |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Late Cambrian |
Early Permian |
England |
Downie,C. Observations on the nature of the acritarchs |
1973 |
| details |
Gorstian |
Ludfordian |
Wales(Brecknockshire) |
Dorning,K.J. Silurian acritarch distribution in the Ludlovian shelf Sea of South Wales and Welsh Borderland. (In: Microfossils from Recent and Fossil Shelf Seas. J.W.Neale and M.D. Brasier. editors) |
1981 |
| details |
Gorstian |
Ludfordian |
Wales(Carmarthenshire) |
Dorning,K.J. Silurian acritarch distribution in the Ludlovian shelf Sea of South Wales and Welsh Borderland. (In: Microfossils from Recent and Fossil Shelf Seas. J.W.Neale and M.D. Brasier. editors) |
1981 |
| details |
Early Devonian |
|
Canada(Ontario) |
Deunff,J. On a microplankton from the Devonian of Canada containing some new types of Hystrichosphaerids. |
1954 |
| details |
Nd |
|
Nd |
Deflandre,G. et al. Nomenclature and systematics of Hystrichospheres (Sens.Lat.) observations and recitifications. |
1961 |
| details |
Silurian |
|
Nd |
Deflandre,G. Groups Incertae Sedis.Hystrichospheres. chitinozoans. |
1952 |
| details |
Ordovician |
Silurian |
Algeria |
de Jekhowsky,B. Organic microfossils (spores, hystrichospheres, chitinozoans, etc.), of the Saharan Pre-Quaternary |
1965 |
| details |
Nd |
|
Nd |
Cramer,F.H. et al. Taxonomic considerations on the acritarchs of the Middle and Upper Silurian of northern Spain. |
1968 |
| details |
Nd |
|
Africa |
Cramer,F.H. Middle Silurian continental movement estimated from phytoplankton-facies transgressions. |
1970 |
| details |
|
|
North America |
Cramer,F.H. Middle Silurian continental movement estimated from phytoplankton-facies transgressions. |
1970 |
| details |
|
|
Brazil |
Cramer,F.H. Middle Silurian continental movement estimated from phytoplankton-facies transgressions. |
1970 |
| details |
Carnian |
|
Greece |
Chotin,P. et al. Precise stratigraphy of the Pindos Formation (Greece): The sedimentation rate of the "Radiolarites". |
1980 |
| details |
Middle Jurassic |
|
USSR(European) |
Chirva,S.A. et al. Correlation of Middle Jurassic - Callovian Sandy Deposits of the Sysola, Yarenga and Pechora River Basins. (In: Jurassic Deposits of the Russian Platform: Collection of Scientific Papers) |
1986 |