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

Viola Formation
Stratigraphic range: Ordovician
Fossils from the Viola Formation
TypeFormation
Location
RegionOklahoma
CountryUnited States
Type section
Named forViola, Johnston County, Oklahoma
Named byJoseph A. Taff, 1902[1]

See also

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References

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  1. ^ 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.