# Sumner Group

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The **Sumner Group** is a sedimentary [geologic group](/source/Group_(geology)) of [Lower Permian](/source/Lower_Permian) age. It is defined in east-central [Kansas](/source/Kansas) and extends into [Oklahoma](/source/Oklahoma) and [Nebraska](/source/Nebraska) as well as the [Colorado](/source/Colorado) subsurface where it is undivided.[2]

## See also

- [List of fossiliferous stratigraphic units in Kansas](/source/List_of_fossiliferous_stratigraphic_units_in_Kansas)
- [Paleontology in Kansas](/source/Paleontology_in_Kansas)

## References

1. Cragin, F.W., 1896, The Permian system in Kansas: Colorado College Studies, v. 6, p. 1-48.

1. ["Geologic Unit: Sumner"](https://ngmdb.usgs.gov/Geolex/UnitRefs/SumnerRefs_10649.html). *National Geologic Database*. Geolex — Significant Publications. [United States Geological Survey](/source/United_States_Geological_Survey). Retrieved 2021-11-28.

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