original |
Late Albian |
|
Nebraska |
Tschudy,R.H. Stratigraphic distribution of species of the megaspore genus Minerisporites in North America. |
1976 |
original |
Late Cretaceous |
|
Canada(Arctic) |
Sweet,A.R. Jurassic and Cretaceous megaspores. |
1979 |
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 |