The Sumner Group is a sedimentary geologic group of Lower Permian age. It is defined in east-central Kansas and extends into Oklahoma and Nebraska as well as the Colorado subsurface where it is undivided.
The Sumner Group is a sedimentary geologic group of Lower Permian age. It is defined in east-central Kansas and extends into Oklahoma and Nebraska as well as the Colorado subsurface where it is undivided. (en)
The Sumner Group is a sedimentary geologic group of Lower Permian age. It is defined in east-central Kansas and extends into Oklahoma and Nebraska as well as the Colorado subsurface where it is undivided. (en)