Hanna Formation
| Hanna Formation | |
|---|---|
| Stratigraphic range: Selandian-Thanetian (Torrejonian-Tiffanian) ~63–56 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
 Petrified wood from the Hanna Formation | |
| Type | Formation |
| Location | |
| Coordinates |   Hanna Formation (the United States) Show map of the United States Hanna Formation (Wyoming) Show map of Wyoming |
The Hanna Formation is a geologic formation in Wyoming. It preserves fossils dating back to the Torrejonian to Tiffanian stages of the Paleogene period.[1]
See also
References
- ^ Hanna Formation at Fossilworks.org
Further reading
- C. S. Scott and R. C. Fox. 2005. Windows on the evolution of Picrodus (Plesiadapiformes: Primates): morphology and relationships of a species complex from the Paleocene of Alberta. Journal of Paleontology 79(4):635-657
- R. Secord. 1998. Paleocene mammalian biostratigraphy of the Carbon Basin, southeastern Wyoming, and age constraints on local phases of tectonism. Rocky Mountain Geology 33(1):119-154
- J. A. Lillegraven. 1994. Age of upper reaches of Hanna Formation, northern Hanna Basin, south-central Wyoming. Berliner geowissenschaftliche Abhandlungen E (Paläobiologie) 13:203-219
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