U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Olentangy Shale
  • Modifications:
    • Areal extent
    • Overview
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Appalachian basin
Publication:

Conkin, J.E., 1989, Olentangy Shale and its correlatives in Eastern United States: University of Louisville Studies in Paleontology and Stratigraphy, G, p. 221-243., Reprinted from 1987 Eastern Oil Shale Symp., Commonwealth of Kentucky


Summary:

Olentangy Shale consists of a lower and an upper member, which correlate with the Blocher and Selmier of IN and KY, the lower and upper Dowelltown of TN, the Genesee and Sonyea of NY, and the Harrell and Brallier of the Appalachians. Olentangy is missing in northern OH, MI, southern Ontario, and western TN. "The Olentangy Shale [and its correlatives] extends in outcrop from Delaware Co., central OH, to southern OH, on all sides of the Cincinnati arch in KY, southern and north-central IN, northern and eastern Highland Rims of TN, and Tishomingo Co., MS."

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


Map showing publication footprint
  • Usage in publication:
    • Olentangy Shale Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Chesnut, D.R., Jr., 1992, Stratigraphic and structural framework of the Carboniferous rocks of the central Appalachian basin in Kentucky: Kentucky Geological Survey Bulletin, 11th series, no. 3, 42 p.


Summary:

In this study, the Chattanooga Shale is divided into (ascending) Rhinestreet Shale, Upper Olentangy Shale, Ohio Shale, Bedford Shale, Berea Sandstone, and Sunbury Shale Members. The Chattanooga thins westward. Geophysical logs indicate that in the western region, unit consists of only the Sunbury, Berea-Bedford, and Ohio Members, the Rhinestreet and Olentangy having pinched out. [No mention is made of a lower Olentangy in this report. Usage of "Upper Olentangy Shale Member" is not recommended.] According to the author, formal nomenclature presented in this report has been accepted by the Kentucky Stratigraphic Nomenclature Committee. Report includes correlation charts, cross-sections, and measured sections.

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


Map showing publication footprint
  • Usage in publication:
    • Olentangy Shale*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

de Witt, Wallace, Jr., Roen, J.B., and Wallace, L.G., 1993, Stratigraphy of Devonian black shales and associated rocks in the Appalachian basin, IN Roen, J.B., and Kepferle, R.C., eds., Petroleum geology of the Devonian and Mississippian black shale of eastern North America: U.S. Geological Survey Bulletin, 1909-B, p. B1-B57.


Summary:

In central OH and northern KY, the Olentangy consists of a lower gray shale, and an upper greenish gray shale. Unit is generally less than 50 ft thick. It can only be identified with certainty in the subsurface a few mi east of its outcrop. At the western edge of the Pipe Creek Shale Member of the Java Formation, authors definitely drop the usage of the Olentangy. The upper greenish-gray shale is of Late Devonian age and appears to be the combined Angola Shale Member of the West Falls Formation and the Hanover Shale Member of the Java Formation based on the abundant calcareous nodules and scattered thin beds of black shale in both.

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


Search archives

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 ([ ]).