Usage:
Union Valley Formation (OK)
Union Valley Sandstone (OK*)
Union Valley limestone (informal) (OK-subsurface of Okfuskee Co.)
For informal usage, the rank or lithologic term should not be capitalized.
Geologic age:
Early Pennsylvanian (Morrowan)*
Type section, locality, area and/or origin of name:
Type locality: near Union Valley Schoolhouse, Pontotoc Co., east-central OK (Hollingsworth, 1934).
AAPG geologic province:
Chautauqua platform Ouachita folded belt*
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 ([ ]).