| original |
Liassic |
Dogger |
USSR(Kazakh SSR) |
Kovalchuk,G.M. Paleobotanical characteristics of Lower Mesozoic deposits of the Karagandinsk Basin. (In: History of Lower Mesozoic Coal Accumulation in Kazakhstan: Part 2.) |
1961 |
| original |
Late Triassic |
Early Jurassic |
USSR(Kazakh SSR) |
Kovalchuk,G.M. Paleobotanical charateristics of Lower Mesozoic deposits of Alakul'sk Seam. (In: History of Lower Mesozoic Coal Accumulation in Kazakhstan: Part 2.) |
1961 |
| original |
Middle Jurassic |
|
China(Honan) |
Zhang,L.C. Pollen assemblages and their significance in the Yima Coal-bearing series from Yinchi Hsien, Honan Province. |
1965 |
| original |
Danian |
|
North Sea |
Holtedahe,H. et al. Two sediment cores from Norwegian continental shelf between Haltenbanken and Froyabanken (64'06'N,7'39'E) |
1974 |