original |
Coniacian |
Santonian |
Wyoming |
Tschudy,R.H. Stratigraphic distribution of species of the megaspore genus Minerisporites in North America. |
1976 |
original |
Aptian |
Albian |
Canada(NWT) |
Sweet,A.R. Jurassic and Cretaceous megaspores. |
1979 |
original |
Late Cretaceous |
|
Canada(Alberta) |
Speelman,J.D. et al. Megaspore paleoecology |
1980 |
original |
Paleocene |
|
North Dakota |
Melchior,R.C. et al. Some megaspores and other small fossils from the Wannagan Creek Site, (Paleocene), North Dakota. |
1983 |
original |
Late Aptian |
|
Montana |
Lapasha,C.A. et al. Flora of the Early Cretaceous Kootenai Formation in Montana, Bryophytes and Tracheophytes excluding Conifers. |
1985 |
original |
Early Aptian |
|
W.Germany(Niedersachsen) |
Batten,D.J. Megaspores from Lowermost Aptian Beds in northern Germany. (In: The Barremian-Aptian Boundary. A Study of profiles from the boreal Cretaceous.E.Kemper, editor) |
1995 |