Tokio Formation

The Tokio Formation is a Late Cretaceous geologic formation in Arkansas and Oklahoma.[1] Named in 1919 by Hugh Dinsmore Miser and Albert Homer Purdue in their study of Arkansas.[2] They assigned the town of Tokio, Hempstead County, Arkansas as the type locality, but did not designate a stratotype for this unit.

Tokio Formation
Stratigraphic range: Cretaceous
TypeFormation
Unit ofnone
Sub-unitsnone
UnderliesBrownstown Marl
OverliesWoodbine Formation
Thicknessup to 300 feet[1]
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named forTokio, Hempstead County, Arkansas
Named byHugh Dinsmore Miser and Albert Homer Purdue[2]

References

  1. McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 28.
  2. Miser, Hugh D.; Purdue, A.H. (1919). "Gravel deposits of the Caddo Gap and De Queen quadrangles, Arkansas". U.S. Geological Survey Bulletin. 690-B: 19–24.


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