| original |
Santonian |
Maastrichtian |
USSR(Yamalo-Nenets) |
Bondarenko,N.M. Palynological basis of stratigraphic differential on of Upper Cretaceous deposits discovered in bore holes from drill cores of the Ob Bay District. (In: Paleontology and Biostratigraphy of the Soviet Arctic. #2. N.A.Shvedov, editor) |
1961 |
| original |
Early Pliocene |
Middle Pliocene |
Canada(Arctic) |
Aksu,A.E. et al. Magnetostratigraphy and palynology Demonstrate at Least 4 Million years of Arctic sedimentation |
1985 |
| original |
Oligocene |
Miocene |
USSR(Azerbaijan SSR) |
Dzhabarova,K.S. Flora and vegetation of Western Azerbaijan during the Upper Miocene. |
1967 |