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National Geologic Map Database

Geologic Unit: Tyrone

Usage:

Tyrone Limestone of High Bridge Group (KY*)


Subunits:

FORMATION STATUS: Deicke K-bentonite Bed (KY*), /Boonesborough metabentonite beds [informal] .


Geologic age:

Late Ordovician (Mohawkian; Turinian)*


Type section, locality, area and/or origin of name:

Type area: vicinity of Tyrone, Anderson Co., KY (Miller, 1905).


AAPG geologic province:

Cincinnati arch*


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 ([ ]).