Nacatoch Formation

Nacatoch Formation
Nacatoch Formation
Stratigraphic range: Late Cretaceous
Type	Formation
Underlies	Arkadelphia Marl
Overlies	Saratoga Formation
Thickness	150 to 400 feet
Location
Region	Arkansas
Country	United States
Type section
Named for	Nacatoch Bluff on the Little Missouri River, Clark County, Arkansas
Named by	Albert Homer Purdue

Last updated July 21, 2025

The Nacatoch Formation is a geologic formation in Arkansas, USA.^[1] It preserves fossils dating back to the Cretaceous period.

References

1 2 McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 30–31. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-12.
↑ Veatch, A.C. (1905). "Underground waters of eastern United States". U.S. Geological Survey Water-Supply Paper. 114: 183.

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 25 March 2022. Retrieved 17 December 2021.

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[McFarland-1] 1 2 McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 30–31. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-12.

[2] Veatch, A.C. (1905). "Underground waters of eastern United States". U.S. Geological Survey Water-Supply Paper. 114: 183.

[1]

[2]

Nacatoch Formation

See also

References