Usage:
Osgood Formation (AL,IN*,KY*,OH*,TN*)
Osgood Shale (IN*,OH*)
Osgood Limestone of Wayne Group (TN)
Osgood Limestone Member of Wayne Formation (TN)
Osgood Member of Salamonie Dolomite (IN)
Osgood Formation of Wayne Group (TN*)
Geologic age:
early Silurian (Llandovery to Wenlock)*
Type section, locality, area and/or origin of name:
Osgood, Ripley Co., IN (Foerste, 1896).
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 ([ ]).