| details |
Late Albian |
|
Canada(Alberta) |
Leckie,D.A. et al. Organic-rich, radioactive marine Shale; A case study of a shallow-water condensed section Cretaceous Shaftesbury Formation, Alberta, Canada. |
1990 |
| details |
Nd |
|
Nd |
Mao,S. et al. Origin and evolution of terrestrial dinoflagellates and their significance in source potential for petroleum |
1990 |
| details |
Nd |
|
Nd |
Gao,R.-Q. et al. Cretaceous microphytoplankton from the Songliao Basin and its depositional environment. |
1992 |
| details |
Early Cretaceous |
|
China(Heilungkiang) |
Mao,S.-Z. et al. Cretaceous nonmarine dinoflagellate from northeast China. |
1999 |