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]

Hanna Formation
Stratigraphic range: Selandian-Thanetian (Torrejonian-Tiffanian)
~63–56 Ma
Petrified wood from the Hanna Formation
TypeFormation
Location
Coordinates41°48′N 107°00′W / 41.8°N 107.0°W / 41.8; -107.0
Approximate paleocoordinates47°36′N 86°48′W / 47.6°N 86.8°W / 47.6; -86.8
RegionWyoming
Country United States
ExtentCarbon Basin
Type section
Named forHigh Hanna Hill
Hanna Formation is located in the United States
Hanna Formation
Hanna Formation (the United States)
Hanna Formation is located in Wyoming
Hanna Formation
Hanna Formation (Wyoming)
Tilted strata of the Hanna Formation

See also

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References

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Further reading

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  • 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