| details |
Late Triassic |
|
New Mexico |
Ash,S.R. Ferns from the Chinle Formation in the Fort Wingate, New Mexico area. |
1970 |
| details |
Triassic |
|
USA |
Balme,B.E. Fossil in situ, spores and pollen grains: An annotated catalogue. |
1995 |
| details |
Late Carnian |
Early Norian |
Arizona |
Ash,S.R. The fossil ferns of Petrified Forest National Park, Arizona, and their paleoclimatological implications. |
2001 |
| details |
Late Carnian |
Early Norian |
Arizona |
Ash,S.R. The fossil ferns of Petrified Forest National Park, Arizona, and their paleoclimatological implications. |
2001 |