| details |
Ordovician |
|
Nd |
Downie,C. The geological history of the microplankton. |
1967 |
| details |
Late Ordovician |
|
South Africa |
Cramer,F.H. et al. Upper Ordovician chitinozoans from the Cedarberg Formation of South Africa.Preliminary Note. |
1974 |
| details |
Nd |
|
Nd |
Combaz,A. Algal materials and the origin of oil. |
1973 |
| details |
Ordovician |
|
USSR(Estonian SSR) |
Collinson,M.E. et al. The oil-generating potential of plants from coal and coal-bearing strata through time: A review with new evidence from Carboniferous plants. (In: Coal and Coal-bearing Strata as Oil-Prone Source Rocks. A.C.Scott and A.J.Fleet, editors) |
1994 |
| details |
Ordovician |
Silurian |
USSR(Buryat ASSR) |
Butov,Y.P. Certain problems of Pre-Mesozoic stratigraphy of the Sayan-Baikal Mountain Area. 1: Crysis of traditional stratigraphy. |
1985 |
| details |
Cambrian |
|
India |
Bharadwaj,D.C. Sporalogical dating of non-marine sedimentary rocks in India |
1972 |
| details |
Nd |
|
Nd |
Batten,D.J. Palynofacies and palaeoenvironmental interpretation. (Principles and Applications. Applications. J.Jansonius and D.C.McGregor, editors.) |
1996 |
| details |
Late Ordovician |
Early Gothlandian |
USSR(Yaroslav) |
Aristova,K.E. et al. Upper Ordovician and Silurian of the Moscow Syneclise |
1977 |
| details |
Late Llandoverian |
Wenlockian |
USSR(Moscow) |
Aristova,K.E. Palynological research of Silurian deposits in the Moscow Basin. |
1976 |