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 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 ([ ]).