Bell Canyon Formation
The Bell Canyon Formation is a geologic formation found in the Delaware Basin of southeastern New Mexico and western Texas. It contains fossils characteristic of the Guadalupian Age of the Permian Period.[1]
| Bell Canyon Formation Stratigraphic range: Guadalupian | |
|---|---|
| Type | Formation |
| Unit of | Delaware Mountain Group |
| Underlies | Castile Formation |
| Overlies | Cherry Canyon Formation |
| Thickness | 200–300 m (660–980 ft) |
| Lithology | |
| Primary | Sandstone, siltstone |
| Other | Limestone |
| Location | |
| Coordinates | 31.9359°N 104.7237°W |
| Region | New Mexico Texas |
| Country | United States |
| Type section | |
| Named for | Bell Canyon |
| Named by | DeFord and Lloyd |
| Year defined | 1940 |
  Bell Canyon Formation (the United States)  Bell Canyon Formation (Texas) | |
Description
The formation consists mostly of marine sandstone and siltstone, but with five interfingering tongues of gray limestone. These extend from the Capitan reef into what was then deep, anoxic water 300–500 meters (980–1,640 ft) of the Permian Basin. Total thickness of the formation is 200–300 meters (660–980 ft).[2]
Fossils
The formation's Lamar Limestone Member of Guadalupe Mountains National Park has produced fossil holocephalan teeth.[3]
History of investigation
The unit was first designated as a formation by DeFord and Lloyd in 1940, who raised the Delaware Mountain Formation to group rank and designed its previously informal members as formations.[4][5]
Footnotes
- Kues and Giles 2004, p.100
- Kues and Giles 2004, p.125-127
- "Guadalupe Mountains National Park," Hunt, Santucci, and Kenworthy (2006); page 64.
- DeFord and Lloyd 1940
- King 1942
References
- DeFord, Ronald K.; Lloyd, E. Russell (1940). "West Texas-New Mexico Symposium: Part I Editorial Introduction". AAPG Bulletin. 24. doi:10.1306/3D933188-16B1-11D7-8645000102C1865D.
- King, P.B. (1942). "Permian of West Texas and Southeastern New Mexico: PART 1". AAPG Bulletin. 26. doi:10.1306/3D933466-16B1-11D7-8645000102C1865D.
- Kues, B.S.; Giles, K.A. (2004). "The late Paleozoic Ancestral Rocky Mountain system in New Mexico". In Mack, G.H.; Giles, K.A. (eds.). The geology of New Mexico. A geologic history: New Mexico Geological Society Special Volume 11. pp. 95–136. ISBN 9781585460106.
- Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 2006. "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands. New Mexico Museum of Natural History and Science Bulletin 34, pp. 63–69.