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  • Usage in publication:
    • Tanglewood Limestone Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Black, D.F.B., Cressman, E.R., and MacQuown, W.C., Jr., 1965, The Lexington Limestone (Middle Ordovician) of central Kentucky, IN Contributions to stratigraphy, 1965: U.S. Geological Survey Bulletin, 1224-C, p. C1-C29.


Summary:

Named as a member of Lexington Limestone. Named for Tanglewood, a suburb of Frankfort, Franklin Co., KY. Characterized by calcarenite, much of which is phosphatic, composed predominately of subrounded skeletal fragments, ranging from fine to coarse sand and generally cemented by sparry calcite. Its bedding character is somewhat variable, though bedding surfaces are commonly smooth and cross bedding in common. Total thickness at type section is 61 ft. At type section, underlain by the Brannon Member, overlain by Clays Ferry Formation. At type section, Tanglewood is divided into two parts by a 10-foot thick intercalation of Devils Hollow Member.

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


Map showing publication footprint
  • Usage in publication:
    • Tanglewood Limestone 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 Tanglewood Limestone Member of the Lexington Limestone consists of pinkish-gray, cross-bedded, phosphatic, medium-grained, well-sorted, bioclastic calcarenite that contains bryozoans, brachiopods, and crinoids. Thickness is 60 to 100 feet. Overlies and intertongues with the Grier Limestone Member, intertongues with the Perryville Member, Brannon Member, Devils Hollow Member, and Millersburg Member, all of the Lexington Limestone, and underlies and intertongues with the Sulphur Well Member of the Lexington Formation and the Clays Ferry Formation. The Tanglewood is interpreted to be deposited in a tidal environment.

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


Map showing publication footprint
  • Usage in publication:
    • Tanglewood Limestone 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:

Figure 3 shows that Tanglewood Limestone Member of Lexington Limestone is Champlainian (Shermanian) in age, but boundary between Shermanian and Edenian Stages (and therefore the top of the Tanglewood), is queried.

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).