| details |
Late Telychian |
Early Wenlockian |
Worldwide |
Grahn,Y. Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Early Wenlockian |
|
Sweden |
Grahn,Y. Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) |
1988 |
| details |
Late Llandoverian |
Early Wenlockian |
Estonia |
Nestor,V. Biostratigraphy: Silurian chitinozoans |
1990 |
| details |
Wenlockian |
|
USSR(Estonian SSR) |
Nestor,V. Chitinozoans at the Llandovery-Wenlock transition in the Jaagarahu core, Estonia. |
1993 |
| details |
Early Sheinwoodian |
|
Sweden(Gotland) |
Grahn,Y. Lower Silurian chitinozoa and biostratigraphy of subsurface Gotland. |
1995 |
| details |
Early Wenlockian |
|
Sweden(Gotland) |
Verniers,J. Calibration of Chitinozoa versus graptolite biozonation in the Wenlock of Builth Wells district (Wales, U.K), compared with other areas in Avalonia and Baltica. |
1999 |
| details |
Late Telychian |
|
Paraguay |
Grahn,Y. et al. Silurian and Lower Devonian chitinoan biostratigraphy of the Parana Basin in Brazil and Paraguay. |
2000 |
| details |
Late Llandoverian |
|
Brazil(Paraiba) |
Le H©riss©,A. et al. Palynological characterization and dating of the TianguЎ Formation, Serra Grande Group, Northern Brazil. (In: Correla§ўo de SeqмЄncias Paleozгicas Sul-Americanas (J.H.G.Melo and G.J.S.Terra, editors. 25 CiЄncia-T©cnica-Petrгleo.) |
2001 |