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Geologic Unit: Oaks
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Map showing publication footprint
  • Usage in publication:
    • Oaks shale member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Forest City basin
Publication:

Moore, R.C., and Condra, G.E., 1932, Oct. 1932 revised classification chart of Pennsylvanian rocks of Kansas and Nebraska [Revision of chart shown on p. 95-97 of Kansas Geological Society 6th Annual Field Conference Guidebook, Sept. 1932], IN Kellett, Betty, Cross section: Kansas Geological Society Guidebook for the Annual Field Conference, August 28-September 3, 1932, no. 6, p. 95-97., See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 2


Summary:

Oaks shale member of Admire shale of Wabaunsee group. Age is Late Pennsylvanian (Virgil). [Oaks shale is shown as top member of Admire shale and as overlying Houchen Creek limestone and underlying true Americus limestone. Whether these beds were included in Hughes Creek shale as originally defined or are a newly discovered unit was not stated, but it appears that this shale and overlying true Americus limestone were included in Hughes Creek shale of previous reports. Origin of name not stated.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1525); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Oaks shale member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Forest City basin
Publication:

Condra, G.E., 1935, Geologic cross-section, Forest City, Missouri to south of Du Bois, Nebraska: Nebraska Geological Survey Paper, no. 8, 23 p., Issued late in 1935. See also USGS unpub. corr. charts of Pennsylvanian and Permian rocks of KS and NE, compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, Oct. 1936


Summary:

Pg. 8. Oaks shale member of Hamlin shale formation of Admire group. The Hamlin shale formation includes in section from Forest City, Missouri, to DuBois, Nebraska, (descending) Oaks shale, Houchens Creek limestone, and Stine shale. Near Salem, Nebraska, the Oaks shale is about 17 to 18 feet thick. Consists of (ascending): greenish-gray calcareous shale, 14 to 15 feet; greenish-gray impure limestone, 4 to 6 inches; gray-green calcareous shale, 8 inches; and black, sub-fissile shale, 2 feet. Underlies Foraker limestone formation of Council Grove group. Age is considered Permian (lower part of Big Blue).

Source: Publication; US geologic names lexicon (USGS Bull. 896, p. 1525, Hamlin entry p. 902); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Oaks shale
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Forest City basin
Publication:

Wilmarth, M.G., 1936, [Selected Geologic Names Committee remarks (ca. 1935-1938) on Carboniferous and Permian rocks of the Midcontinent], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.


Summary:

E.C. Reed (Asst. State Geol. Nebraska), 1936 (letter dated Oct. 16). Type locality of Oaks shale is Oaks farm, southwest of Salem, in NE/4 sec. 9, T. 1 N., R. 15 E., Richardson Co., southeastern NE.

Source: US geologic names lexicon (USGS Bull. 896, p. 1525).


Map showing publication footprint
  • Usage in publication:
    • Oaks shale bed*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Forest City basin
Publication:

Moore, R.C., and Mudge, M.R., 1956, Reclassification of some Lower Permian and Upper Pennsylvanian strata in northern Midcontinent, IN Geological notes: American Association of Petroleum Geologists Bulletin, v. 40, no. 9, p. 2271-2278. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 2274 (fig. 1). Oaks shale bed of Hamlin shale member of Janesville shale. Rank reduced to bed in Hamlin shale herein reduced to member status in Janesville shale (new). Age is Early Permian (Wolfcampian).

Source: US geologic names lexicon (USGS Bull. 1200, p. 2791).


Map showing publication footprint
  • Usage in publication:
    • Oaks shale bed*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Nemaha anticline
Publication:

Boardman, D.R., II, Wardlaw, B.R., and Nestell, M.K., 2009, Stratigraphy and conodont biostratigraphy of the uppermost Carboniferous and Lower Permian from the North American Midcontinent: Kansas Geological Survey Bulletin, no. 255, 253 p.


Summary:

Pg. 218-219 (figs. 123, 124). Oaks shale bed of Hamlin Shale Member of Janesville Shale of Admire Group. Overlies Houchen Creek limestone bed of Hamlin Shale Member and underlies Americus Limestone Member of Foraker Limestone of Council Grove Group. Age is Late Pennsylvanian (late Gzhelian; STREPTOGNATHODUS FLEXUOSUS conodont zone), based on stratigraphic position.
Described from measured section in Pottawatomie County, eastern Kansas. (Loc. A13.)

Source: Publication.


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Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).