Jump to content

Tansill Formation

From Wikipedia, the free encyclopedia
Tansill Formation
Stratigraphic range: Guadalupian
Yates (yellow sandstone) and Tansill (white limestone)
TypeFormation
Unit ofArtesia Group
OverliesYates Formation
Thickness123–320 feet (37–98 m)
Lithology
PrimaryLimestone, siltstone, anhydrite
Location
Coordinates32°26′53″N 104°15′54″W / 32.448°N 104.265°W / 32.448; -104.265
RegionNew Mexico
CountryUnited States
Type section
Named forTansill power dam
Named byDeFord et al.
Year defined1938
Tansill Formation is located in the United States
Tansill Formation
Tansill Formation (the United States)
Tansill Formation is located in New Mexico
Tansill Formation
Tansill Formation (New Mexico)

The Tansill Formation is a geologic formation in southeastern New Mexico and west Texas, United States.[1] It preserves fossils dating back to the late Guadalupian Age of the Permian period.[2]

Description

[edit]
Tansill Formation exposed at Rattlesnake Canyon as viewed from the trailhead, Carlsbad National Park

The formation consists of limestone, siltstone, and anhydrite that is extensive in the subsurface in southeastern New Mexico and west Texas. The formation is mostly limestone in the south and west, around the rim of the Delaware Basin, and grades into anhydrite in the north and east. It forms the top of the Capitan reef but dips steeply into the subsurface.[3] It has a total thickness of 123–320 feet (37–98 m).[3][4] It overlies the Yates Formation.[5] The formation is part of the Artesia Group, which is interpreted as a shelf rock sequence.[2]

History of investigation

[edit]

The formation was first named by DeFord et al. in 1938[1] and formally defined in 1941 and assigned to the (now abandoned) Whitehorse Group.[3] Tait et al. assigned it to the newly defined Artesia Group in 1962.[2]

See also

[edit]

Footnotes

[edit]
  1. ^ a b DeFord et al. 1928
  2. ^ a b c Tait et al. 1962
  3. ^ a b c DeFord and Riggs 1941
  4. ^ Newell et al. 1953
  5. ^ King 1948

References

[edit]
  • DeFord, R.K.; Riggs, G.D.; Willis, N.H. (1938). "Surface and subsurface formations, Eddy County, New Mexico". American Association of Petroleum Geologists Bulletin. 22 (12): 1706–1707.
  • DeFord, R.K.; Riggs, G.D. (1941). "Tansill Formation, West Texas and Southeastern New Mexico". AAPG Bulletin. 25 (9): 1713–1728. doi:10.1306/3D9333E4-16B1-11D7-8645000102C1865D.
  • King, P.B. (1948). "Geology of the southern Guadalupe Mountains, Texas". U.S. Geological Survey Professional Paper. 215. Retrieved 6 August 2020.
  • Newell, N.D., Rigby, J.K., Fischer, A.G., Whiteman, A.J., HIckox, J.E., and Bradley, J.S., 1953, The Permian reef complex of the Guadalupe Mountains region, Texas and New Mexico; a study in paleoecology: San Francisco, W.H. Freeman and Company
  • Tait, D.B.; Ahien, J.L.; Gordon, A.; Scott, G.L.; Motts, W.S.; Spitler, M.E. (1962). "Artesia Group of New Mexico and West Texas". AAPG Bulletin. 46 (4): 504–517. doi:10.1306/BC74383B-16BE-11D7-8645000102C1865D.