Earth:Carlile Shale

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Short description: Geologic formation in the western US
Carlile Shale
Stratigraphic range: Turonian
~93.9–89.8 Ma
↓
Fairport Chalk Member of the Carlile Formation in Ellis County, Kansas 01.png
Rare exposure of the Fairport Chalk member of the Carlile Shale in southern Ellis County, Kansas
TypeGeological formation
Unit ofColorado Group (lower); or
Benton Formation
Mancos Group (NM)
Sub-unitsJuana Lopez (CO, NM)
Codell Sandstone
Blue Hill Shale
Fairport Chalk
UnderliesNiobrara Formation
OverliesGreenhorn Limestone
Thickness170–230 feet (52–70 m)
Lithology
PrimaryShale, chalky to carbonaceous
OtherLimestone
Sandstone
Siltstone
Septarians
Bentonite
Location
Coordinates [ ⚑ ] 38°22′34″N 104°58′44″W / 38.376°N 104.979°W / 38.376; -104.979
RegionMid-continental
Country United States
Type section
Named forCarlile Spring and Carlile Station, 21 mi west of Pueblo, Colorado[1]
Named byGilbert
Year defined1896
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The Carlile Shale is a Turonian age Upper/Late Cretaceous series shale geologic formation in the central-western United States, including in the Great Plains region of Colorado, Kansas , Nebraska, New Mexico, North Dakota, South Dakota, and Wyoming.[2]

History of investigation

The Carlile Shale was first named by Grove Karl Gilbert for exposures at Carlile Spring, located about 21 miles (34 km) west of Pueblo, Colorado. He described it as a medium gray shale, capped with limestone or sandstone, and assigned it to the Benton Group.[3] By 1931, William Walden Rubey and his coinvestigators had mapped it into Kansas [4] and the Black Hills. Rubey also first assigned it to the Colorado Group.[5] C.H. Dane assigned it to the Mancos Shale in New Mexico in 1948.[6]

Description

The formation is composed of marine deposits of the generally retreating phase (hemi-cycle) of the Greenhorn cycle of the Western Interior Seaway, which followed the advancing phase of the same cycle that formed the underlying Graneros Shale and Greenhorn Formation.[7] As such, the lithology progresses from open ocean chalky shale (with thin limestones) to increasing carbonaceous shale to near-shore sandstone.[8] Near the center of the seaway, currents in the remnant shallows sorted skeletal remains into a mass of calcareous sand. The contact between the Carlile Shale and the overlying Niobrara Formation is marked by an unconformity in much of the outcrop area, but where an unconformity is not discernible, the boundary is typically placed at the first resistant, fine-grained limestone bed at the base of the Niobrara Formation.[9]

Gallery

  • The lower 25 feet (7.6 m) of the Fairport Chalk member in southern Ellis County, Kansas.

  • 1867, bluffs west of Hays, behind the seated soldiers is pre-settlement digging in the Blue Hill Shale.

  • The bare Blue Hill Shale slopes at Yocemento as they appeared in 1873

Fossil content

Upper Turonian series plesiosaur remains are among the fossils that have been recovered from the strata of its Blue Hill Shale Member in Kansas.[10] The Carlile in eastern South Dakota contains shark teeth, fossil wood and leaves, and ammonites.[11]

Reptiles

Crocodyliforms

Crocodyliforms
Genus Species Location Stratigraphic position Material Notes Images
Terminonaris T. cf. T. browni Russell County, Kansas.[12] Fairport Chalk Member.[12] A partial rostrum.[12] A pholidosaur.

Plesiosaurs

Plesiosaurs
Genus Species Location Stratigraphic position Material Notes Images
Megacephalosaurus M. eulerti Near Fairport, Kansas.[13] Fairport Chalk Member.[13] A skull & anterior cervical material (FHSM VP-321).[13] A pliosaurid.
Megacephalosaurus eulerti MP.png
Plesiosauria Mitchell County, Kansas.[10] Blue Hill Member.[10] Portions of a rib (FHSM VP-17299).[10] May represent a large elasmosaur or pliosaur.

Squamates

Squamates
Genus Species Location Stratigraphic position Material Notes Images
Coniasaurus C. cf. C. crassidens Russell County, Kansas.[14] Fairport Chalk Member.[14] 2 incomplete vertebrae (FHSM VP-4418).[14] A dolichosaurid.
Coniasaurus.jpg
Russellosaurina Ellis County, Kansas.[15] Middle of the Fairport Chalk Member.[15] 7 successive proximal caudal vertebrae (FHSM VP-17564).[15] A russellosaurine mosasaur.

Fish

Cartilaginous fish

Cartilaginous fish
Genus Species Location Stratigraphic position Material Notes Images
Cretodus C. houghtonorum North-central Kansas.[16] Blue Hill Shale.[16] A partial skeleton consisting of 134 disarticulated teeth, 61 vertebrae, 23 placoid scales, and fragments of calcified cartilage.[16] A mackerel shark.
Cretoxyrhina C. mantelli Dixon County, Nebraska.[17] Fairport Chalky Shale Member.[17] A tooth (UNSM 129549).[17] A large mackerel shark.
Ginsu shark (Cretoxyrhina mantellii).jpg
Ptychodus P. latissimus Kansas.[18] Codell Sandstone Member.[18] 3 teeth.[18] A ptychodontid.
P. mammillaris North of Schoenchen, Ellis County, Kansas.[19] Fairport Chalk Member.[19] A medial tooth (FHSM VP-15284).[19] A ptychodontid.
Ptychodus mammillaris.JPG
P. sp. Ellis County, Kansas.[20] Blue Hill Shale Member.[20] A tooth contained in a coprolite (FHSM VP-13325).[20] A ptychodontid.



See also

  • Volcanic mineralization of the Greenhorn cycle:
    • Bentonite, sedimentary volcanic ash (named for the original Graneros/Greenhorn/Carlile classification), generally showing some weathered iron stain in the Colorado Group
    • Pyrite, precipitation of volcanic sulfuric acid with oceanic iron as FeS2
    • Limonite, pyrite in limestone weathered to HFeO2 (rust stain or yellow ochre)
    • Selenite, CaSO4 associated with Bentonite seams and ochre[21]

References

  1. ↑ "Geologic Unit: Carlile". National Geologic Database. United States Geological Survey. https://ngmdb.usgs.gov/Geolex/Units/Carlile_6965.html. 
  2. ↑ USGS.gov: Mineral resources of the Niobrara and Carlile Formations
  3. ↑ Gilbert, G.K. (1896). "Seventeenth Annual report of the United States Geological Survey to the Secretary of the Interior, 1895-1896". in Walcott, C.D.. Seventeenth Annual report of the United States Geological Survey to the Secretary of the Interior, 1895-1896. 17. pp. 551–601. doi:10.3133/ar17_2. 
  4. ↑ Rubey, W.W.; Bass, N.W. (1925). "The geology of Russell County, Kansas, with special reference to oil and gas resources". Kansas Geological Survey Bulletin 10 (1): 1–86. 
  5. ↑ Rubey, W.W. (1931). "Lithologic studies of fine-grained Upper Cretaceous sedimentary rocks of the Black Hills region". U.S. Geological Survey Professional Paper 165-A: A1–A54. doi:10.3133/pp165A. 
  6. ↑ Dane, C.H. (1948). "Geology and oil possibilities of the eastern side of the San Juan Basin, Rio Arriba County, New Mexico". U.S. Geological Survey Oil and Gas Investigations Map OM-78. https://ngmdb.usgs.gov/Prodesc/proddesc_5439.htm. Retrieved 23 November 2020. 
  7. ↑ McLane, Michael (1982). "Upper Cretaceous Coastal Deposits in South-Central Colorado--Codell and Juana Lopez Members of Carlile Shale". AAPG Bulletin 66. doi:10.1306/03B59A26-16D1-11D7-8645000102C1865D. 
  8. ↑ White, Timothy; Arthur, Michael A. (May 2006). "Organic carbon production and preservation in response to sea-level changes in the Turonian Carlile Formation, U.S. Western Interior Basin". Palaeogeography, Palaeoclimatology, Palaeoecology 235 (1–3): 223–244. doi:10.1016/j.palaeo.2005.09.031. Bibcode: 2006PPP...235..223W. 
  9. ↑ King, Norman R. (1974). "The Carlile-Niobrara contact and lower Niobrara strata near El Vado, New Mexico". New Mexico Geological Society Field Conference Series 24: 259–266. 
  10. ↑ 10.0 10.1 10.2 10.3 Jstor.org: "Probable plesiosaur remains from the Blue Hill Shale (Carlile Formation)" in Kansas", Kansas Academy of Science, 2009.
  11. ↑ [1] William A. Cobban and E.A. Merewether (1983), Stratigraphy and paleontology of mid-Cretaceous rocks in Minnesota and contiguous areas. USGS Professional Paper 1253.
  12. ↑ 12.0 12.1 12.2 Shimada, Kenshu; Parris, David C. (2007). "A Long-Snouted Late Cretaceous Crocodyliform, Terminonaris cf. T. browni, from the Carlile Shale (Turonian) of Kansas". Transactions of the Kansas Academy of Science 110 (1/2): 107–115. doi:10.1660/0022-8443(2007)110[107:ALLCCT2.0.CO;2]. ISSN 0022-8443. https://www.jstor.org/stable/20476300. 
  13. ↑ 13.0 13.1 13.2 Schumacher, Bruce A.; Carpenter, Kenneth; Everhart, Michael J. (May 2013). "A new Cretaceous Pliosaurid (Reptilia, Plesiosauria) from the Carlile Shale (middle Turonian) of Russell County, Kansas". Journal of Vertebrate Paleontology 33 (3): 613–628. doi:10.1080/02724634.2013.722576. Bibcode: 2013JVPal..33..613S. https://www.researchgate.net/publication/263690337. 
  14. ↑ 14.0 14.1 14.2 Shimada, Kenshu; Ystesund, Tracy K. (2007). "A Dolichosaurid Lizard, Coniasaurus cf. C. crassidens, from the Upper Cretaceous Carlile Shale in Russell County, Kansas". Transactions of the Kansas Academy of Science 110 (3/4): 236–242. doi:10.1660/0022-8443(2007)110[236:ADLCCC2.0.CO;2]. ISSN 0022-8443. https://www.jstor.org/stable/20476320. 
  15. ↑ 15.0 15.1 15.2 Schumacher, Bruce A. (2011). "A 'woollgari-zone mosasaur' (Squamata; Mosasauridae) from the Carlile Shale (Lower Middle Turonian) of central Kansas and the stratigraphic overlap of early mosasaurs and pliosaurid plesiosaurs". Transactions of the Kansas Academy of Science 114 (1/2): 1–14. doi:10.1660/062.114.0101. ISSN 0022-8443. https://www.jstor.org/stable/41309621. 
  16. ↑ 16.0 16.1 16.2 Shimada, K.; Everhart, M. (July 2019). "A New Large Late Cretaceous Lamniform Shark from North America, with Comments on the Taxonomy, Paleoecology, and Evolution of the Genus Cretodus" (in en). Journal of Vertebrate Paleontology 39 (4): e1673399. doi:10.1080/02724634.2019.1673399. Bibcode: 2019JVPal..39E3399S. 
  17. ↑ 17.0 17.1 17.2 Johnson-Ransom, Evan; Shimada, Kenshu; Kirkland, James I. (April 2016). "The Late Cretaceous Lamniform Shark,Cretoxyrhina mantelli, from the Fairport Chalky Shale Member of the Carlile Shale in Northeastern Nebraska". Transactions of the Kansas Academy of Science 119 (2): 208–210. doi:10.1660/062.119.0212. ISSN 0022-8443. https://www.researchgate.net/publication/301798722. 
  18. ↑ 18.0 18.1 18.2 Hamm, Shawn A. (2020). "The First Occurrence of Ptychodus latissimus from the Codell Sandstone Member of the Carlile Shale in Kansas" (in en). Transactions of the Kansas Academy of Science 123 (3–4). doi:10.1660/062.123.0311. 
  19. ↑ 19.0 19.1 19.2 Everhart, Michael J.; Darnell, Michelle K. (2004). "Occurrence of Ptychodus mammillaris (Elasmobranchii) in the Fairport Chalk Member of the Carlile Shale (Upper Cretaceous) of Ellis County, Kansas". Transactions of the Kansas Academy of Science 107 (3/4): 126–130. doi:10.1660/0022-8443(2004)107[0126:OOPMEI2.0.CO;2]. ISSN 0022-8443. https://www.jstor.org/stable/3627900. 
  20. ↑ 20.0 20.1 20.2 Shimada, Kenshu (1997). "Shark-Tooth-Bearing Coprolite from the Carlile Shale (Upper Cretaceous), Ellis County, Kansas". Transactions of the Kansas Academy of Science 100 (3/4): 133–138. doi:10.2307/3628001. ISSN 0022-8443. https://www.jstor.org/stable/3628001. 
  21. ↑ Alvin R. Leonard; Delmar W. Berry (1961). Geology and Ground-water Resources of Southern Ellis County and Parts of Trego and Rush Counties, Kansas, Bulletin 149. University of Kansas Publications, State Geological Survey of Kansas. p. Geologic Formations in Relation to Ground Water. http://www.kgs.ku.edu/Publications/Bulletins/149/04_form.html. "The upper 175 feet of the Carlile is classed as the Blue Hill Shale member. Most of it is blue-gray fissile argillaceous shale that contains selenite crystals and flakes of bright yellow ochre." 




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