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Viola Formation
Viola Formation
Stratigraphic range: Ordovician
	Fossils from the Viola Formation
Type	Formation
Location
Region	Oklahoma
Country	United States
Type section
Named for	Viola, Johnston County, Oklahoma
Named by	Joseph A. Taff, 1902

The Viola Formation is a geologic formation in Oklahoma. It preserves fossils dating back to the Ordovician period.

References

^ Taff, Joseph A. (1902). "Atoka Folio, Indian Territory" (PDF). U. S. Geological Survey Geologic Atlas of the United States. 79: 3. Retrieved 6 August 2018.

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.

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