| details |
Middle Oligocene |
|
W.Germany(N.Rhine) |
Helal,A.H. Age and distribution of the Tertiary Browncoal in the area of Gladbach east of Cologne. |
1958 |
| details |
Early Miocene |
Middle Miocene |
Yugoslavia |
Ercegovac,M. Paleopalynological and petrographical characteristics of Kamengrad Coal |
1975 |
| details |
Late Pontian |
|
Yugoslavia |
Weyland,H. et al. Investigations of the spore and pollen floras of some Yugoslav and Greek Brown Coals |
1958 |
| details |
Early Miocene |
|
Yugoslavia |
Pantic,N.K. et al. Palynological analysis of the Brown Coals and Lignites from the Tertiary Basin of Livno. |
1964 |
| details |
Early Pliocene |
|
Yugoslavia |
Pantic,N.K. et al. The Lower Pliocene swamp vegetation of the Kolubara Bay and the genesis of the Coal Seam. |
1967 |
| details |
Early Pliocene |
|
Yugoslavia |
Ercegovac,M. Palynologic and petrologic characteristics and the genesis of Coal in the Kreka Basin. |
1970 |
| details |
Tertiary |
|
Yugoslavia |
Milakovic,B.B. The stratigraphy of Tertiary deposits at Dragaceva (Central Serbia). |
1967 |