Tokio Formation

Last updated
Tokio Formation
Stratigraphic range: Cretaceous
Type Formation
Unit ofnone
Sub-unitsnone
Underlies Brownstown Marl
Overlies Woodbine Formation
Thicknessup to 300 feet [1]
Location
Region Arkansas, Oklahoma
Country United States
Type section
Named forTokio, Hempstead County, Arkansas
Named byHugh Dinsmore Miser and Albert Homer Purdue [2]

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.

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References

  1. 1 2 McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 28.
  2. 1 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.