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Geologic Unit: Westboro
Map showing publication footprint
  • Usage in publication:
    • Westboro K-bentonite zone
  • Modifications:
    • First used
  • Dominant lithology:
    • Bentonite
    • Claystone
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Schumacher, G.A., and Carlton, R.W., 1991, Impure K-bentonite beds from the Lexington Limestone and the Point Pleasant Formation (Middle Ordovician) of northern Kentucky and southwestern Ohio: Southeastern Geology, v. 32, no. 2, p. 83-105.


Summary:

A 7.9-m interval, occurring within the upper part of the Lexington Limestone and containing two to four impure K-bentonite beds is here informally named the Westboro K-bentonite zone. In hand sample, the Westboro is a fossiliferous claystone. Consists of a mixture of altered volcanic ash and marine sediments. Beds range from 0.03 m to 0.15 m thick. Zone occurs 3.6 m to 11.6 m below the Lexington-Point Pleasant contact and is assigned to the Mohawkian (Shermanian) Stage.

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


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 ( ).

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