| details |
Late Llandoverian |
Wenlockian |
Belgium |
Le H©riss©,A. Biogeography of upper Llandovery and Wenlock acritarchs. |
1995 |
| details |
Late Llandoverian |
Early Wenlockian |
Turkey |
Miller,M.A. et al. Early Silurian acritarchs and prasinophytes from the subsurface of southeastern Turkey. |
1998 |
| details |
Late Cambrian |
Early Tremadocian |
USSR(Estonian SSR) |
Volkova,N.A. Acritarchs of the Desposits of the Cambrian-Ordovician boundary northern Estonia |
1989 |
| details |
Late Cambrian |
|
Estonia |
Volkova,N.A. Acritarchs from the Cambrian - Ordovician Boundary Beds, (Boring Core M-56), of the Estonian, near Clint Area. |
1993 |
| details |
Late Aeronian |
Early Telychian |
Czechoslovakia |
Dufka,P. Acritarchs of the monograptus Sedgwickii Zone, (Zelkovice Formation, Llandovery), from Hyskov, Barrandian, Bohemian Massif |
1990 |
| details |
Hirnantian |
Rhuddanian |
Argentina(Salta) |
Vergel,M.D.M. et al. Ordovician palynomorphs of Argentina: An integrated approach. (Aspects of the Ordovician System in Argentina.) |
2002 |
| details |
Gorstian |
|
Sweden(Gotland) |
Stricanne,L. et al. Acritarch distribution along an inshore-offshore transect in the Gorstian (lower Ludlow) of Gotland, Sweden |
2004 |
| details |
Early Triassic |
|
India(Rajasthan) |
Tripathi,A. Representation of acritarch across the Permian. A tyro's view in India. |
1997 |
| details |
Early Triassic |
|
India(West Bengal) |
Tripathi,A. Representation of acritarch across the Permian. A tyro's view in India. |
1997 |
| details |
Early Triassic |
|
India(Madhya Pradesh) |
Tripathi,A. Representation of acritarch across the Permian. A tyro's view in India. |
1997 |
| details |
Early Triassic |
|
India(Orissa) |
Tripathi,A. Representation of acritarch across the Permian. A tyro's view in India. |
1997 |
| details |
Early Triassic |
|
India(Arunachal Pradesh) |
Tripathi,A. Representation of acritarch across the Permian. A tyro's view in India. |
1997 |
| details |
Early Telychian |
|
Scotland(Dumfries) |
White,D.E. et al. Biostratigraphy of Late Llandovery (Telychian) and Wenlock Turbiditic sequences in the southwest Southern Uplands, Scotland. |
1992 |
| details |
Early Riphean |
|
Canada(NWT,Franklin) |
Hofmann,H.J. et al. Shelf-facies microfossils from the Uluksan Group (Proterozoic Bylot Supergroup), Baffin Island, Canada. |
1991 |
| details |
Early Rhuddanian |
|
Czechoslovakia |
Dufka,P. Palynomorphs in the Llandovery black shale sequence of the Prague Basin (Barrandian area, Bohemia). |
1990 |
| details |
Early Ludlovian |
Middle Ludlovian |
Argentina(San Juan) |
Rubinstein,C.V. Acritarch from the Silurian of the Jachal River Valley (Los Esp Formation), San Juan Province, Republica Argentina Subgroups Herkumorphita, Netromorphitae and Polgonomorphitae |
1989 |
| details |
Early Llandoverian |
Middle Llandoverian |
Spain |
Hafenrichter,M. The lower and upper boundary of the Ordovician system of some selected regions, (Celtiberia, Eastern Sierramorena) in Spain. Part 2. The Ordovician/Silurian bounday in Spain. |
1980 |