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Map showing publication footprint
  • Usage in publication:
    • Plum Creek clay
  • Modifications:
    • First used
  • Dominant lithology:
    • Clay
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Foerste, A.F., 1905, Silurian clays, with notes on clays of the Waverly and Irvine formations, Part 2, IN Garner, J.H., Clays in several parts of Kentucky, with some account of sands, marls and limestones: Kentucky Geological Survey Bulletin, no. 6, p. 143-223.


Summary:

Pg. 145. See also entry under Foerste (1906). Plum Creek clay. Is lower of two beds in the Indian Fields formation; upper bed is Oldham limestone.
[According to GNU records (USGS DDS-6; Reston GNULEX, Nov. 17, 1986), this is "first published use" of the Plum Creek; proposal did not meet nomenclatural guidelines (shown on stratigraphic table).]

Source: Modified from GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Plum Creek clay
  • Modifications:
    • Named
  • Dominant lithology:
    • Clay
    • Limestone
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Foerste, A.F., 1906, The Silurian, Devonian, and Irvine formations of east-central Kentucky, with an account of their clays and limestones: Kentucky Geological Survey Bulletin, no. 7, 369 p.


Summary:

Pg. 10, 44, 61; also 1905, Kentucky Geol. Survey Bull., no. 6, p. 145. Plum Creek clay. Clay interbedded with thin limestones, 5 feet thick, forming part of Indian Fields formation (of Niagaran age). Overlain by Oldham limestone (top member of Indian Fields formation) and underlain by limestone, 1 to 2 feet thick, which forms basal part of Indian Fields formation and is regarded as belonging above the line of unconformity which in east-central Kentucky is marked by WHITFIELDELLA SUBQUADRATA [brachiopod] and an oolitic iron-ore bed. Age is Silurian (Niagaran). [In 1931 (Kentucky Geol. Survey, ser. 6, v. 36, p. 172, 173) Foerste assigned this clay to Medinian. In 1935 (Denison Univ. Bull., Sci. Lab. Jour., v. 30, p. 130-133) Foerste gave further details.]
Named from Plum Creek, Powell Co., east-central KY.

Source: US geologic names lexicon (USGS Bull. 896, p. 1683); supplemental information from GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Plum Creek Clay Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Rexroad, C.B., Branson, E.R., Smith, M.O., Summerson, C.H., and Boucot, A.J., 1965, The Silurian formations of east-central Kentucky and adjacent Ohio: Kentucky Geological Survey Bulletin, 10th series, no. 2, 34 p., Prepared in cooperation with Indiana Geol. Survey


Summary:

Reassigned as Plum Creek Clay Member of Noland Formation (new) of Crab Orchard Group. Consists of grayish-blue calcareous clay and thin interbeds of impure limestone, particularly in basal part. Thickness 4 to 7 ft. Underlies Oldham Limestone Member; overlies Brassfield Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Plum Creek Member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Simmons, G.C., 1967, Geologic map of the Clay City quadrangle, Powell and Estill Counties, Kentucky: U.S. Geological Survey Geologic Quadrangle Map, GQ-663, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_1972.htm]


Summary:

Reassigned as Plum Creek Member of Crab Orchard Formation and adopted by the USGS.

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


Map showing publication footprint
  • Usage in publication:
    • Plum Creek Shale Member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Cincinnati arch
Publication:

McDowell, R.C., 1983, Stratigraphy of the Silurian outcrop belt on the east side of the Cincinnati arch in Kentucky, with revisions in the nomenclature, IN Contributions to the geology of Kentucky: U.S. Geological Survey Professional Paper, 1151-F, p. F1-F27. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp1151F]


Summary:

Reassigned as Plum Creek Shale Member of Drowning Creek Formation of Crab Orchard Group and adopted by the USGS. Composed of greenish-gray, poorly fissile clay shale with few beds and lenses of dolomite. Ranges from 2 to 12 ft in thickness. Conformably underlain by Brassfield Member, conformably overlain by Oldham Member, both of Drowning Creek Formation.

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


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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 ( ).

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