Usage:
/Boonesborough metabentonite beds [informal] of Tyrone Formation of High Bridge Group (KY)
/Boonesborough metabentonite beds [informal] (subsurface of OH,TN)
[Actually consists of 3 beds (Boonesborough metabentonite bed no. 1, Boonesborough metabentonite bed no. 2, and Boonesborough metabentonite bed no. 3). Use of identical geographic names to several minor units in one vertical sequence is considered informal nomenclature (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). The rank or lithologic term should not be capitalized.]
Geologic age:
Late Ordovician (Mohawkian; Turinian)
Type section, locality, area and/or origin of name:
Type section: roadcut on KY Highway 627, northeast of Memorial Bridge over Kentucky River, Clark Co., KY. Named from town of Boonesborough (Conkin and Conkin, 1983).
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 ([ ]).