Usage:
Oldham Limestone Member of Noland Formation (KY,OH)
Oldham Member of Drowning Creek Formation of Crab Orchard Group (KY*)
Geologic age:
early Silurian (Llandovery)*
Type section, locality, area and/or origin of name:
Type section: cuts along Louisville and Atlantic RR between Panola and Brassfield where the railroad follows the northern slope of the valley of Oldham Branch, Madison Co., east-central KY (Foerste, 1906). [From GNU records (USGS DDS-6; Reston GNULEX).]
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 ([ ]).