Carlile Shale

From Justapedia, unleashing the power of collective wisdom
(Redirected from Carlile Formation)
Jump to navigation Jump to search

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
Coordinates38°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
Carlile Shale is located in the United States
Carlile Shale
Carlile Shale (the United States)
Carlile Shale is located in Colorado
Carlile Shale
Carlile Shale (Colorado)

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]

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.[3] As such, the lithology progresses from open ocean chalky shale (with thin limestones) to increasing carbonaceous shale to near-shore sandstone.[4] 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.[5]

Fossils

Upper Turonian series Plesiosaur remains are among the fossils that have been recovered from the strata of its Blue Hill Shale Member in Kansas.[6] The Carlile in eastern South Dakota contains shark teeth, fossil wood and leaves, and ammonites.[7]

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.[8] By 1931, William Walden Rubey and his coinvestigators had mapped it into Kansas[9] and the Black Hills. Rubey also first assigned it to the Colorado Group.[10] C.H. Dane assigned it to the Mancos Shale in New Mexico in 1948.[11]

Gallery

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

    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.

    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.

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


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[12]


References

  1. ^ "Geologic Unit: Carlile". National Geologic Database. Geolex — Unit Summary. United States Geological Survey. Retrieved 2017-02-03.
  2. ^ USGS.gov: Mineral resources of the Niobrara and Carlile Formations
  3. ^ 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.
  4. ^ 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. Bibcode:2006PPP...235..223W. doi:10.1016/j.palaeo.2005.09.031.
  5. ^ 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. CiteSeerX 10.1.1.513.8769. Retrieved 23 November 2020.
  6. ^ Jstor.org: "Probable plesiosaur remains from the Blue Hill Shale (Carlile Formation)" in Kansas", Kansas Academy of Science, 2009.
  7. ^ [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.
  8. ^ Gilbert, G.K. (1896). "The underground water of the Arkansas Valley in eastern Colorado". In Walcott, C.D. (ed.). Seventeenth Annual report of the United States Geological Survey to the Secretary of the Interior, 1895-1896. Vol. 17. pp. 551–601. doi:10.3133/ar17_2.
  9. ^ 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.
  10. ^ 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.
  11. ^ 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. Retrieved 23 November 2020.
  12. ^ Alvin R. Leonard and 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. 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.{{cite book}}: CS1 maint: uses authors parameter (link)


Stub icon

This article about a specific stratigraphic formation in the United States is a stub. You can help Justapedia by expanding it.

Retrieved from "https://justapedia.org/index.php?title=Carlile_Shale&oldid=1047602724"