| 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 Tremadocian |
Early Arenigian |
England(Cumberland) |
Cooper,A.H. et al. The age and correlation of Skiddaw Group (Early Ordovician), sediments in the Cross Fell Inlier (Northern England) |
1990 |
| details |
Ordovician |
|
Morocco |
Rahmani-Antari,K. Palynological study and evaluation of the Thermal Alteration Index, (TAI), of the Paleozoic Section of Well Dot 1 (Doukkala Basin, Central-West Morocco). |
1990 |
| details |
Tremadocian |
|
Austria |
Reitz,E. et al. Biostratigraphic evidence of Lower Ordovician in the Innsbruck Quartzphyullite Group (Eastern Alps) |
1990 |
| details |
Ludlovian |
Siedlce |
Poland |
Stempien,M. Ordovician and Silurian acritarchs of the Niestachow Sandstone Formation (Gory Swietokrzyskie Mountains) |
1990 |
| details |
Llanvirnian |
Baoto |
China(Szechwan) |
Lai,C.-G. et al. Restudy on Ordovician of Southern Shaanxi-Northern Sichuan areas. |
1990 |
| details |
Llanvirnian |
Baoto |
China(Shansi) |
Lai,C.-G. et al. Restudy on Ordovician of Southern Shaanxi-Northern Sichuan areas. |
1990 |
| details |
Arenigian |
Llandeilian |
Belgium |
Servais,T. Contribution to the stratigraphy of the Ordovician Rigenee Formation (Brabant Massif, Belgium) with a preliminary study on acritarchs. |
1991 |
| details |
Middle Cambrian |
Tremadocian |
Canada(Newfoundland) |
Parsons,M.G. et al. The biostratigraphic potential of Middle Cambrian to Tremadocian acritarchs; Modification of existing zonal schemes based on material from Conception and Trinity Bays, Newfoundland, and St.John, New Brunswick. |
1991 |
| details |
Middle Cambrian |
Tremadocian |
Canada(New Brunswick) |
Parsons,M.G. et al. The biostratigraphic potential of Middle Cambrian to Tremadocian acritarchs; Modification of existing zonal schemes based on material from Conception and Trinity Bays, Newfoundland, and St.John, New Brunswick. |
1991 |
| details |
Early Tournaisian |
|
Libya |
VavrdovЎ,M. Latest Devonian miospores and acritarchs from the subsurface samples of the Ashkidah Formation. (In: The Geology of Libya. M.J.Salem et al, editors) |
1991 |
| details |
Llanvirnian |
Caradocian |
England(Cumberland) |
Millward,D. et al. Field and biostratigraphic evidence for an unconformity at the Base of the Eycott Volcanic Group in the English Lake District |
1992 |
| details |
Middle Wenlockian |
Late Wenlockian |
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 Ludlovian |
|
England(Cumberland) |
McCaffrey,W.D. et al. Recycled acritarchs as provenance indicators;Implications for Caledonian Terrane reconstruction |
1992 |
| details |
Late Llandoverian |
Early Wenlockian |
S.Ireland(Tipperary) |
McCaffrey,W.D. et al. Recycled acritarchs as provenance indicators;Implications for Caledonian Terrane reconstruction |
1992 |
| details |
Late Llandoverian |
|
Scotland(Borders) |
McCaffrey,W.D. et al. Recycled acritarchs as provenance indicators;Implications for Caledonian Terrane reconstruction |
1992 |
| details |
Late Llandoverian |
Early Wenlockian |
S.Ireland(Galway) |
McCaffrey,W.D. et al. Recycled acritarchs as provenance indicators;Implications for Caledonian Terrane reconstruction |
1992 |