| original |
Jurassic |
Jurassic |
USSR(Sverdlovskaya) |
Kara-Murza,E.N. Spores and pollen of Mesozoic deposits of the northern Eniseydk Lensk Region. |
1954 |
| details |
Precambriam |
Cambrian |
USSR(Siberia) |
Timofeev,B.V. Discovery of Cambrian and Precambrian spores in formations of eastern Siberia. |
1955 |
| details |
Devonian |
|
USSR(Ukrainian SSR) |
Medvedeva,A.M. Palynological investigation of Petroleum |
1978 |
| details |
Middle Jurassic |
|
Nd |
Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. |
1990 |