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	41°48′N107°00′W / 41.8°N 107.0°W / 41.8; -107.0
Approximate paleocoordinates	47°36′N86°48′W / 47.6°N 86.8°W / 47.6; -86.8
Region	Wyoming
Country	United States
Extent	Carbon Basin
Type section
Named for	High Hanna Hill
Hanna Formation (the United States) Show map of the United States Hanna Formation (Wyoming) Show map of Wyoming

Tilted strata of the Hanna Formation

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

• List of fossiliferous stratigraphic units in Wyoming
• Paleontology in Wyoming

References

1. 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