| details |
Early Oligocene |
|
Romania |
Petrescu,J. General characteristics of the spore-pollen spectrum from the Oligocene of the northwestern part of Transylvania. |
1972 |
| details |
Early Oligocene |
|
Romania |
Petrescu,J. Paleobiology of the Oligocene forest of Northeast Rumania, according to palynological studies. |
1973 |
| details |
Early Oligocene |
Middle Oligocene |
Romania |
Olaru,L. Research on the stratigraphical distribution of microflora in the Paleogene flysch situated between the Bistrita and Totus Rivers. |
1978 |
| details |
Early Miocene |
Middle Miocene |
Romania |
Petruscu,J. et al. The micropaleontological content of the Neogene deposits of the boreholes of Alesd and Sabolciu, Vadului Basin, (Northern Roumania). |
1978 |