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Geologic Unit: Logana
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Map showing publication footprint
  • Usage in publication:
    • Logana bed
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Miller, A.M., 1905, The lead and zinc bearing rocks of central Kentucky, with notes on the mineral veins: Kentucky Geological Survey Bulletin, no. 2, 35 p.


Summary:

Named the Logana Bed of Lexington Limestone for Logana Station on L & A RR. Type locality is vicinity of Logana Station (now abandoned). Argillaceous limestone, very fossiliferous. 10 ft thick.

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


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

Cressman, E.R., 1964, Geology of the Tyrone quadrangle, Kentucky: U.S. Geological Survey Geologic Quadrangle Map, GQ-303, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_763.htm]


Summary:

Rank reduced to Logana Member of Lexington Limestone. Underlain by Curdsville Limestone Member, overlain by Grier Limestone Member. Thin- to thick-bedded, gray, fine- to medium-grained limestone with interbedded shale in upper and lower parts. Most of limestone is brachiopodal. 17-24 ft thick.

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


Map showing publication footprint
  • Usage in publication:
    • Logana Member
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Shrake, D.L., Wolfe, P.J., Richard, B.H., Wickstrom, L.H., Potter, P.E., and Sitler, G.W., 1990, Lithologic and geophysical description of a continuously cored hole in Warren County, Ohio, including description of the Middle Run Formation (Precambrian?) and a seismic profile across the core site: Ohio Division of Geological Survey Information Circular, no. 56, 11 p.


Summary:

Nomenclature of the Lexington in this report follows Stith (1986: OH Rept. Inv. 132) who extended the Curdsville and Logana Members to OH. Upper Lexington is undifferentiated and gradationally underlies Point Pleasant Formation in southwestern OH.

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


Map showing publication footprint
  • Usage in publication:
    • Logana Member*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Wahlman, G.P., 1992, Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati arch region, IN Pojeta, John, Jr., ed., Contributions to the Ordovician paleontology of Kentucky and nearby states: U.S. Geological Survey Professional Paper, 1066-O, p. O1-O203.


Summary:

The Logana Member of the Lexington Limestone in KY consists of interbedded dark, argillaceous calcisiltite and brownish gray, calcareous and dolomitic shale. Unit is generally unfossiliferous, but a few beds contain mollusks and brachiopods. Thickness is 50 feet in central KY and thins to the south. Overlies the Curdsville Limestone Member and underlies the Grier Limestone Member, both of the Lexington Limestone. The environment of deposition is interpreted to be deeper, quiet water with poor oxygenation.

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


Map showing publication footprint
  • Usage in publication:
    • Logana Member*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Frey, R.C., 1995, Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati arch region of Kentucky, Indiana, and Ohio, IN Pojeta, John, Jr., ed., Contributions to the Ordovician paleontology of Kentucky and nearby states: U.S. Geological Survey Professional Paper, 1066-P, p. P1-P126.


Summary:

Logana Member of Lexington Limestone is Champlainian (Kirkfieldian) in age.

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


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For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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