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Geologic Unit: Turner
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Map showing publication footprint
  • Usage in publication:
    • Turner sandy member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Shale
    • Siltstone
  • AAPG geologic province:
    • Williston basin
    • Powder River basin
Publication:

Rubey, W.W., 1931, Lithologic studies of fine-grained Upper Cretaceous sedimentary rocks of the Black Hills region, IN Shorter contributions to general geology, 1930: U.S. Geological Survey Professional Paper, 165-A, p. A1-A54.


Summary:

Named as middle of three members (lowermost member is unnamed) of Carlile shale for exposures along Turner Creek in T46 and 47N, R64W, Weston Co, WY in Powder River basin. Type section not given. Crops out along west side of Black Hills in northeastern WY and southeastern MT in Powder River and Williston basins. Consists of more or less sandy shale and siltstone with iron-stained concretions. Persistent thin beds of sandstone, locally conglomeratic and phosphatic and containing abundant shark teeth, in lower part. Marine fossils. Forms a minor scarp. A distinct faunal break and possible unconformity at base. Thickness 150-200 ft. Overlies unnamed lower member; underlies Sage Breaks shale member (new) of Niobara formation. Samples of upper Cretaceous shale, claystone, and marl, including a sample from Turner sandy member, compared for their mineralogy, chemical composition, grain size, density, porosity, fissility, and bedding laminations. Late Cretaceous in age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner sandy member*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Williston basin
    • Powder River basin
    • Chadron arch
Publication:

Reeside, J.B., Jr., 1944, Maps showing thickness and general character of the Cretaceous deposits in the Western Interior of the United States: U.S. Geological Survey Oil and Gas Investigations Preliminary Map, OM-10, scale 1:13,939,200


Summary:

Member of Carlile shale in Great Plains region [Black Hills, SD and WY in Powder River and Williston basins and on Chadron arch]. Age shown as Late Cretaceous (Turonian).

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner sandy member*
  • Modifications:
    • Overview
    • Biostratigraphic dating
  • AAPG geologic province:
    • Williston basin
    • Powder River basin
Publication:

Cobban, W.A., 1951, Colorado shale of central and northwestern Montana and equivalent rocks of the Black Hills: American Association of Petroleum Geologists Bulletin, v. 35, no. 10, p. 2170-2198. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Member of Carlile shale in northern Black Hills, SD, WY, and MT in Powder River and Williston basins. Discusses lithology, correlation, and representative fossils. Shows faunal zonation in northern Black Hills. Overlies lower unnamed shale member unconformably; underlies Sage Breaks member. Late Cretaceous (Turonian) in age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner sandy member*
  • Modifications:
    • Biostratigraphic dating
    • Overview
  • AAPG geologic province:
    • Powder River basin
    • Williston basin
Publication:

Cobban, W.A., 1958, Late Cretaceous fossil zones of the Powder River basin, Wyoming and Montana, IN Bibb, T.W., Jr., chairman, Powder River basin: Wyoming Geological Association Field Conference Guidebook, no. 13, p. 114-119.


Summary:

Member of Carlile shale. Lists index fossils and discusses their stratigraphic and geographic distribution in the Powder River basin and southernmost part of Williston basin. Shows faunal zonation. Late Cretaceous (Turonian) in age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner sandy member*
  • Modifications:
    • Mapped 1:48k
    • Overview
    • Revised
  • AAPG geologic province:
    • Powder River basin
    • Williston basin
Publication:

Knechtel, M.M., and Patterson, S.H., 1962, Bentonite deposits of the northern Black Hills district, Wyoming, Montana, and South Dakota, IN Contributions to economic geology, 1958: U.S. Geological Survey Bulletin, 1082-M, p. M893-M1030, (incl. geologic map, scale 1:48,000)


Summary:

Mapped as middle member of three members of Carlile shale in western and eastern Crook Co, WY, Powder River basin and west-central and southwestern Butte Co, SD, Williston basin. Carlile assigned to Colorado group. Consists of dark shale with many limestone concretions and lenses of light-gray sandstone and sandy shale; locally contains lenses of phosphatic nodules and intraformational shale pebbles. Near Belle Fourche, SD, unit is 260 ft thick; thins westward to about 150 ft. Measured sections; geologic map; columnar section. Overlies newly named Pool Creek shale member of Carlile; underlies Sage Breaks member of Carlile. Late Cretaceous age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner Sandy Member*
  • Modifications:
    • Mapped 1:62.5k
    • Overview
  • AAPG geologic province:
    • Powder River basin
Publication:

Mapel, W.J., and Pillmore, C.L., 1964, Geology of the Upton quadrangle, Crook and Weston Counties, Wyoming, IN Contributions to general geology, 1963: U.S. Geological Survey Bulletin, 1181-J, p. J1-J54.


Summary:

Mapped as middle of three members of Carlile Shale. Outcrops as narrow band striking northwest along Black Hills monocline, Powder River basin. [Also mapped in nearby Fanny Peak quad (Brobst, Epstein, 1963, USGS Bull. 1063-I), Inyan Kara Mountain quad (Mapel, Pillmore, 1963, USGS Bull. 1121-M), and Newcastle area (Maple, Pillmore, 1963, USGS Bull. 1141-N.] Consists mostly of dark-gray shale interlaminated with very light-gray siltstone and some thin beds of very fine grained light-gray sandstone that weathers brown; at base is distinctive ledge-forming bed 2-6 ft thick of fine-to medium-grained calcareous sandstone that contains granules and small pebbles of chert and abundant fish teeth; unit characterized by beds of tabular silty limestone concretions. Thickness is about 185 ft in outcrops near Thornton dome and remains about the same throughout quad based on electric logs. Measured section; generalized stratigraphic column. Overlies Pool Creek Shale Member of Carlile; underlies Sage Breaks Shale Member of Carlile. Fossil zones represented include SCAPHITES WARRENI and SCAPHITES CORVENSIS. Late Cretaceous age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner sandy member*
  • Modifications:
    • Mapped 1:96k
    • Overview
  • Dominant lithology:
    • Shale
    • Siltstone
    • Sandstone
  • AAPG geologic province:
    • Powder River basin
Publication:

Robinson, C.S., Mapel, W.J., and Bergendahl, M.H., 1964, Stratigraphy and structure of the northern and western flanks of the Black Hills uplift, Wyoming, Montana, and South Dakota: U.S. Geological Survey Professional Paper, 404, 134 p.


Summary:

Mapped as middle of three members (lower member is unnamed) of Carlile shale along flanks of Black Hills uplift, WY and MT, Powder River basin. Consists of gray sandy shale and siltstone with numerous beds of light-yellow- or reddish-brown-weathering silty and ferruginous limestone concretions; light-gray fine- to coarse-grained calcareous sandstone, locally conglomeratic, up to 5 ft thick at base. Thickness is 150-260 ft. Fossil list; measured sections; stratigraphic chart. Overlies lower unnamed member of Carlile; underlies Sage Breaks member of Carlile. Late Cretaceous age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner Sandy Member*
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Powder River basin
Publication:

Cobban, W.A., 1984, Molluscan record from a mid-Cretaceous borehole in Weston County, Wyoming: U.S. Geological Survey Professional Paper, 1271, 21 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp1271]


Summary:

Extends from depth of 85-140 m in cored borehole in Osage oilfield on west flank of Black Hills, SWNW sec 30, T46N, R63W, Weston Co, WY, Powder River basin. Is middle of three members of Carlile Shale. Consists of interbedded fine- to very fine grained sandstone, siltstone, and noncalcareous shale with sandy or silty limestone concretions. Fig. 1 shows ranges of bivalves and ammonites from cores. Fossils representing zones SCAPHITES WARRENI to S. NIGRICOLLENSIS (upper Turonian) are present. Overlies Pool Creek Member of Carlile; underlies Sage Breaks Member of Carlile. Fossil list.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner Sandy Member*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Williston basin
Publication:

Cobban, W.A., and Kennedy, W.J., 1991, A giant Scaphite from the Turonian (Upper Cretaceous) of the Western Interior of the United States, IN Sando, W.J., ed., Shorter contributions to paleontology and stratigraphy: U.S. Geological Survey Bulletin, 1934-A, p. A1-A2.


Summary:

Is member of the Carlile Shale of SD in southern Williston basin. Ammonites collected in Butte Co, SD place unit in the upper Turonian SCAPHITES WHITFIELDI zone. New species S. BOREALIS described from the Turner Sandy Member is also noted to occur in Morden Shale, Vermilion River, southern Manitoba, CN. Age is refined to late Turonian (Late Cretaceous).

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner Sandy Member*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Powder River basin
Publication:

Fox, J.E., 1993, Stratigraphic cross sections showing electric logs of Upper Cretaceous and older rocks, Powder River basin, southeastern Montana and northeastern Wyoming: U.S. Geological Survey Oil and Gas Investigations Chart, OC-135 to OC-138., Sections A-A' through F-F'; G-G' through L-L'; M-M' through R-R'; S-S' through V-V'


Summary:

Carlile Shale divided into (ascending): Pool Creek, Turner Sandy, and Sage Breaks Members in the subsurface on the east side of the Powder River basin (Converse, eastern Campbell, Crook, Weston, and Niobrara Cos, WY and Powder River Co, MT). In the Powder River basin subsurface west of where the Greenhorn Formation beneath the Carlile and west of where the Pool Creek and Turner Sandy Members can be identified, the name Frontier Formation is applied to the post-Mowry pre-Sage Breaks rocks. The Clay Spur Bentonite Bed is the uppermost bed of the Mowry. The Sage Breaks which lies above the Frontier is raised to formation rank in the west side of the basin. Sage Breaks unconformably underlies Niobrara Formation. Of Late Cretaceous age. [Name used on 22 cross sections in this OC series.]

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Turner Sandy Member*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Powder River basin
Publication:

Merewether, E.A., 1996, Stratigraphy and tectonic implications of Upper Cretaceous rocks in the Powder River basin, northeastern Wyoming and southeastern Montana, IN Evolution of sedimentary basins; Powder River basin: U.S. Geological Survey Bulletin, 1917-T, p. T1-T92.


Summary:

Middle of three members of Carlile Shale. Occurs along eastern flank of Powder River basin; consists of shale, siltstone, and minor sandstone. Outcrops commonly form persistent low ridges. Thins southward from 56-79 m on northern flank of Black Hills to 45-49 m in eastern Niobrara Co; thickness varies from about 24 to 90 m. Stratigraphic and biostratigraphic charts; cross sections; geophysical log. Disconformably overlies Pool Creek Member of Carlile; conformably underlies Sage Breaks Member of Carlile. Contains various trace fossils including OPHIOMORPHA, THALASSINOIDES, and RHIZOCORALLIUM. Also contains fossil palynomorphs, foraminifers, and mollusks indicating late Turonian age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


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