The Roca Formation (or Roca Shale) is an early Permian geologic formation (Wolfcampian) with its exposure running north and south through Kansas and extending into Nebraska and Oklahoma, notably comprising varicolored black, brown, gray, green, red, and blue shales, mudstones, and limestone, some of which representing Permian paleosols.
See also
List of fossiliferous stratigraphic units in Kansas List of fossiliferous stratigraphic units in Nebraska List of fossiliferous stratigraphic units in Oklahoma Paleontology in Kansas Paleontology in Nebraska Paleontology in Oklahoma
References