| 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 |
| details |
Late Valanginian |
Early Hauterivian |
China(Heilungkiang) |
He,C.-Q. et al. Late Hauterivian dinoflagellates from the lower part of the Chengzihe Formation in Jixi Basin, Eastern Heilongjiang, northeast China. |
2000 |
| details |
Late Cenomanian |
Early Turonian |
Colorado |
Dodsworth,P. Trans-Atlantic dinoflagellate cyst stratigraphy across the Cenomanian - Turonian (Cretaceous) Stage boundary |
2000 |
| details |
Late Hauterivian |
|
Italy |
Torricelli,S. Lower Cretaceous dinoflagellate cyst and acritarch stratigraphy of the Cismon APTICORE (Southern Alps, Italy) |
2000 |
| details |
Late Barremian |
|
Italy |
Torricelli,S. Lower Cretaceous dinoflagellate cyst and acritarch stratigraphy of the Cismon APTICORE (Southern Alps, Italy) |
2000 |
| details |
Hauterivian |
Barremian |
China(Heilungkiang) |
Gang,L. Palaeontology and biostratigraphy of the Lower Cretaceous Qihulin Formation in eastern Heilongjiang, northeastern China. |
2001 |
| details |
Late Hauterivian |
|
China(Heilungkiang) |
Sha,J. et al. Studies on the Early Cretaceous Longzhaogou and Jixi Groups of eastern Heilongjiang, northeast China, and their bearing on the age of supposedly Jurassic strata in eastern Asia. |
2002 |