JWHall #223, Phillips Co., MT (Cretaceous of the United States)
Where: Phillips County, Montana (47.5° N, 107.9° W: paleocoordinates 54.2° N, 74.1° W)
• coordinate based on political unit
When: Judith River Formation, Campanian (83.5 - 70.6 Ma)
Environment/lithology:
• No lithology stated.
Size class: microfossils
Preservation: original sporopollenin
Collection methods: bulk, sieve,
Primary reference: J. W. Hall. 1968. A new genus of Salviniaceae and a new species of Azolla from the late Cretaceous. American Fern Journal 58(2):77-88 [R. Lupia/R. Lupia/R. Lupia] more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 32404: authorized by Rick Lupia, entered by Rick Lupia on 28.06.2003