# Chase Group

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The **Chase Group** is a sedimentary rock unit 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. The unit was assigned [geologic group](/source/Group_(geology)) rank around 1902.[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. Prosser, C.S., 1895, The classification of the upper Paleozoic rocks of central Kansas: Journal of Geology, v. 3, nos. 6-7, p. 682-705, 764-800.

1. ["Geologic Unit: Chase"](https://ngmdb.usgs.gov/Geolex/UnitRefs/ChaseRefs_7449.html). *National Geologic Database*. Geolex — Significant Publications. [United States Geological Survey](/source/United_States_Geological_Survey). Retrieved 2021-11-28.

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