Roca Formation (United States) Explained

Roca Formation
Type:	Formation
Age:	early Permian
Prilithology:	Shale and mudstone
Otherlithology:	Limestone
Namedfor:	Roca, Nebraska
Region:	Midcontinent (Nebraska, Kansas, Oklahoma)
Country:	United States

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.^{[1] [2]}

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

Notes and References

1. Book: Jewett, John M. . The Geology of Riley and Geary Counties, Kansas, Kansas Geological Survey Bulletin 39 . University of Kansas Publications, State Geological Survey of Kansas . 1941 . [[[Roca, Nebraska]] is in Lancaster County, Nebraska ].
2. Web site: Geologic Unit: Roca . Geolex — Unit Summary . National Geologic Database . United States Geological Survey . 2019-06-02 .