Spiro Sandstone Member of Savanna Formation of Krebs Group (OK)
Pennsylvanian, Middle
Not designated. Origin of name not stated by author, but probably named from town of Spiro, Le Flore Co., OK (Wilson, 1935).
Arkoma basin
Chautauqua platform
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 ([ ]).