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Atoka Formation

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From Wikipedia, the free encyclopedia
Atoka Formation
Stratigraphic range: Pennsylvanian
TypeGeologic formation
UnderliesHartshorne Sandstone
OverliesBloyd Formation, Johns Valley Formation
Lithology
PrimarySandstone
OtherShale
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named byJ.A. Taff[1]

Named after Atoka County, Oklahoma, the Atoka Formation is a geologic formation in central and western Arkansas, eastern Oklahoma, central and western Texas, and eastern New Mexico.[2] It is the surface rock of the Boston Mountains and dominates exposures in the Frontal Ouachita Mountains of the Arkansas River Valley.[2]

Sedimentology

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The Atoka Formation is a sequence of marine sandstones, siltstones, and shales, and may be as thick at 25,000 feet in the Ouachita Mountains.[2] The formation is conformable with the Bloyd Shale in the Boston Mountains and the Johns Valley Formation in the Ouachita Mountains.[2]

Paleofauna

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Conodonts

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C. lauta[3]
C. sinuata[4]
G. wapanuckensis[5]
G. bella[6]
L. lexingtonensis[8]
O. recta[9]
P. attenuata[10]
P. ouachitensis[11]
S. cancellosus[12]
S. gracilis[13]

Foraminifera

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F. devexa[14]
F. oliviformis[15]
F. prolifica[16]
H. bulbosa[17]
I. semicronstrictus[18]
P. atokensis[19]
P. fittsi[20]
P. millcreekensis[21]
R. fittsi[22]
R. tumidulus[23]
T. sphaeroidalis[24]

Trace Fossils

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C. arkansanus[25]

References

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  1. ↑ Taff, J.A.; Adams, G.I. (1900). "Geology of the eastern Choctaw coal field". Twenty-First Annual Report of the United States Geological Survey, 1899-1900, Part 2, General Geology, Economic Geology, Alaska: 272, 273–274.
  2. 1 2 3 4 "Stratigraphic Summary of the Arkansas River Valley and Ouachita Mountains". Arkansas Geological Survey. Archived from the original on 2018-05-29. Retrieved 2017-11-23.
  3. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  4. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  5. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  6. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  7. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  8. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  9. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  10. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  11. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  12. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  13. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  14. ↑ Thompson, M.L. (1948). "Studies of American fusulinids". University of Kansas Paleontological Contributions, Protozoa. 1: 184.
  15. ↑ Douglass, R.C.; Nestell, M.K. (1984). "Fusulinids of the Atoka Formation, lower-middle Pennsylvanian, south-central Oklahoma" (PDF). Oklahoma Geological Survey Bulletin. 136: 19–39. Retrieved 7 June 2024.
  16. ↑ Thompson, M.L. (1935). "Fusulinids from the lower Pennsylvanian Atoka and Boggy formations of Oklahoma". Journal of Paleontology. 9: 291–306.
  17. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  18. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  19. ↑ Thompson, M.L. (1935). "The fusulinid genus Staffella in America". Journal of Paleontology. 9: 111–120.
  20. ↑ Thompson, M.L. (1935). "Fusulinids from the lower Pennsylvanian Atoka and Boggy formations of Oklahoma". Journal of Paleontology. 9: 291–306.
  21. ↑ Douglass, R.C.; Nestell, M.K. (1984). "Fusulinids of the Atoka Formation, lower-middle Pennsylvanian, south-central Oklahoma" (PDF). Oklahoma Geological Survey Bulletin. 136: 19–39. Retrieved 7 June 2024.
  22. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  23. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  24. ↑ Johansson, F. C. Jr. (1960). Micropaleontology of the Wesley Johns Valley and Atoka Formations of the Ouachita Mountains of Oklahoma (PhD. dissertation). University of Wisconsin. p. 45.
  25. ↑ Branson, Carl C. (May 1961). "New records of the Scyphomedusan Conostichus" (PDF). Oklahoma Geology Notes. 21 (5): 130–138. Retrieved 28 January 2018.
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