| details |
Middle Albian |
Late Albian |
Alaska |
Witmer,R.J. et al. Biostratigraphic correlation of selected test wells of National Petroleum Reserve in Alaska |
1981 |
| details |
Aptian |
Turonian |
Alaska |
Kimyai,A. Palynological assemblages of the Cretaceous sediments in the Fish Creek test Well No.1, North Slope, Alaska |
1992 |
| details |
Late Barremian |
Albian |
Greenland |
Nиhr-Hansen,H. Dinoflagellate cyst stratigraphy of the Barremian to Albian, Lower Cretaceous, Northeast Greenland. |
1993 |
| details |
Early Tithonian |
Middle Tithonian |
|
Quattrocchio,M.E. et al. Jurassic and Lower Cretaceous dinocyst from Argentina; Their biostratigraphic significance. |
1990 |
| details |
Late Albian |
Middle Cenomanian |
Canada(Alberta) |
Bloch,J.D. et al. Sedimentology, micropaleontolgy, geochemistry, and hydrocarbon potential of shale from the Cretaceous Lower Colorado Group in Western Canada. |
1999 |