| details |
Middle Valanginian |
Early Albian |
China(Liaoning) |
Mao,S. et al. Palynological interpretation of Early Cretaceous non-marine strata of northeast China. |
1990 |
| details |
Nd |
|
Nd |
Hughes,N.F. et al. Barremian - Aptian angiospermid pollen records from Southern England. |
1990 |
| details |
Barremian |
Early Aptian |
Maryland |
Kedves,M. Transmission electron microscopy of the fossil angiosperm exines. |
1990 |
| details |
Barremian |
Aptian |
USA |
Kedves,M. Transmission electron microscopy of the fossil angiosperm exines. |
1990 |
| details |
Late Barremian |
Albian |
China(Liaoning) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
Albian |
China(Hopei) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
Albian |
China(Inner Mongolia) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
Albian |
China(Kansu) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
Albian |
China(Sinkiang Uighur) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
Albian |
China(Shansi) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
Albian |
China(Tsinghai) |
Yu,J. The study of Early Cretaceous angiospermous pollen in northern China. |
1990 |
| details |
Late Barremian |
|
Utah |
Cross,A.T. et al. Coal-forming plants through time in North America. |
1990 |
| details |
Late Barremian |
|
Colorado |
Cross,A.T. et al. Coal-forming plants through time in North America. |
1990 |
| details |
Albian |
|
USSR(Kazakh SSR) |
Kruchinina,N.V. et al. Palynostratigraphyof Cretaceous deposits. (In: Practical Palynostratigraphy. L.A. Panova et al, editors) |
1990 |
| details |
Barremian |
Aptian |
USA(Atlantic Coast.Pl.) |
Pedersen,K.R. et al. Fruits from the Mid-Cretaceous of North America with pollen grains of the Clavatipollenites type. |
1991 |
| details |
Hettangian |
Early Sinemurian |
Denmark |
Koppelhus,E.B. Palynology of the Lower Jurassic Ronne Formation on Bornholm, Eastern Denmark. |
1991 |
| details |
Aptian |
|
China(Hainan Island) |
Dong,B.-L. et al. Discovery of Early Cretaceous sporo-pollen assemblages from Baisha Basin of Hainan and its significance |
1991 |